vimspector/README.md

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# vimspector - A multi language graphical debugger for Vim
For a tutorial and usage overview, take a look at the
[Vimspector website][website]
![Build](https://github.com/puremourning/vimspector/workflows/Build/badge.svg?branch=master) [![Gitter](https://badges.gitter.im/vimspector/Lobby.svg)](https://gitter.im/vimspector/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
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* [Features and Usage](#features-and-usage)
* [Supported debugging features](#supported-debugging-features)
* [Supported languages](#supported-languages)
* [Other languages](#other-languages)
* [Installation](#installation)
* [Quick Start](#quick-start)
* [Dependencies](#dependencies)
* [Neovim differences](#neovim-differences)
* [Windows differences](#windows-differences)
* [Trying it out](#trying-it-out)
* [Cloning the plugin](#cloning-the-plugin)
* [Install some gadgets](#install-some-gadgets)
* [VimspectorInstall and VimspectorUpdate commands](#vimspectorinstall-and-vimspectorupdate-commands)
* [install_gadget.py](#install_gadgetpy)
* [Manual gadget installation](#manual-gadget-installation)
* [The gadget directory](#the-gadget-directory)
* [Upgrade](#upgrade)
* [About](#about)
* [Background](#background)
* [Status](#status)
* [Experimental](#experimental)
* [Mappings](#mappings)
* [Visual Studio / VSCode](#visual-studio--vscode)
* [Human Mode](#human-mode)
* [Usage](#usage)
* [Launch and attach by PID:](#launch-and-attach-by-pid)
* [Launch with options](#launch-with-options)
* [Debug configuration selection](#debug-configuration-selection)
* [Get configurations](#get-configurations)
* [Breakpoints](#breakpoints)
* [Exception breakpoints](#exception-breakpoints)
* [Clear breakpoints](#clear-breakpoints)
* [Run to Cursor](#run-to-cursor)
* [Stepping](#stepping)
* [Variables and scopes](#variables-and-scopes)
* [Watches](#watches)
* [Watch autocompletion](#watch-autocompletion)
* [Stack Traces](#stack-traces)
* [Program Output](#program-output)
* [Console](#console)
* [Console autocompletion](#console-autocompletion)
* [Log View](#log-view)
* [Closing debugger](#closing-debugger)
* [Debug adapter configuration](#debug-adapter-configuration)
* [C, C , Rust, etc.](#c-c-rust-etc)
* [Rust](#rust)
* [Remote debugging](#remote-debugging)
* [Remote launch and attach](#remote-launch-and-attach)
* [Python](#python)
* [Remote Debugging](#remote-debugging-1)
* [Remote launch and attach](#remote-launch-and-attach-1)
* [Legacy: vscode-python](#legacy-vscode-python)
* [TCL](#tcl)
* [C♯](#c)
* [Go](#go)
* [PHP](#php)
* [Debug web application](#debug-web-application)
* [Debug cli application](#debug-cli-application)
* [JavaScript, TypeScript, etc.](#javascript-typescript-etc)
* [Java](#java)
* [Usage with YouCompleteMe](#usage-with-youcompleteme)
* [Other LSP clients](#other-lsp-clients)
* [Lua](#lua)
* [Other servers](#other-servers)
* [Customisation](#customisation)
* [Changing the default signs](#changing-the-default-signs)
* [Sign priority](#sign-priority)
* [Changing the default window sizes](#changing-the-default-window-sizes)
* [Changing the terminal size](#changing-the-terminal-size)
* [Advanced UI customisation](#advanced-ui-customisation)
* [Customising the WinBar](#customising-the-winbar)
* [Example](#example)
* [FAQ](#faq)
* [Motivation](#motivation)
* [License](#license)
* [Sponsorship](#sponsorship)
<!-- Added by: ben, at: Sun 22 Nov 2020 14:35:00 GMT -->
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# Features and Usage
The plugin is a capable Vim graphical debugger for multiple languages.
It's mostly tested for c++, python and TCL, but in theory supports any
language that Visual Studio Code supports (but see caveats).
The [Vimspector website][website] has an overview of the UI, along with basic
instructions for configuration and setup.
But for now, here's a (rather old) screenshot of Vimsepctor debugging Vim:
![vimspector-vim-screenshot](https://puremourning.github.io/vimspector-web/img/vimspector-overview.png)
And a couple of brief demos:
[![asciicast](https://asciinema.org/a/VmptWmFHTNLPfK3DVsrR2bv8S.svg)](https://asciinema.org/a/VmptWmFHTNLPfK3DVsrR2bv8S)
[![asciicast](https://asciinema.org/a/1wZJSoCgs3AvjkhKwetJOJhDh.svg)](https://asciinema.org/a/1wZJSoCgs3AvjkhKwetJOJhDh)
## Supported debugging features
- flexible configuration syntax that can be checked in to source control
- breakpoints (function, line and exception breakpoints)
- conditional breakpoints (function, line)
- step in/out/over/up, stop, restart
- run to cursor
- launch and attach
- remote launch, remote attach
- locals and globals display
- watch expressions with autocompletion
- call stack display and navigation
- variable value display hover
- interactive debug console with autocompletion
- launch debugee within Vim's embedded terminal
- logging/stdout display
- simple stable API for custom tooling (e.g. integrate with language server)
## Supported languages
The following table lists the languages that are "built-in" (along with their
runtime dependencies). They are categorised by their level of support:
* `Tested` : Fully supported, Vimspector regression tests cover them
* `Supported` : Fully supported, frequently used and manually tested
* `Experimental`: Working, but not frequently used and rarely tested
* `Legacy`: No longer supported, please migrate your config
| Language | Status | Switch (for `install_gadget.py`) | Adapter (for `:VimspectorInstall`) | Dependencies |
|--------------------|--------------|----------------------------------|------------------------------------|--------------------------------------------|
| C, C++, etc. | Tested | `--all` or `--enable-c` | vscode-cpptools | mono-core |
| Rust, C, C++, etc. | Supported | `--force-enable-rust` | CodeLLDB | Python 3 |
| Python | Tested | `--all` or `--enable-python` | debugpy | Python 2.7 or Python 3 |
| Go | Tested | `--enable-go` | vscode-go | Go, [Delve][] |
| TCL | Supported | `--all` or `--enable-tcl` | tclpro | TCL 8.5 |
| Bourne Shell | Supported | `--all` or `--enable-bash` | vscode-bash-debug | Bash v?? |
| Lua | Supported | `--all` or `--enable-lua` | local-lua-debugger-vscode | Node >=12.13.0, Npm, Lua interpreter |
| Node.js | Supported | `--force-enable-node` | vscode-node-debug2 | 6 < Node < 12, Npm |
| Javascript | Supported | `--force-enable-chrome` | debugger-for-chrome | Chrome |
| Java | Supported | `--force-enable-java ` | vscode-java-debug | Compatible LSP plugin (see [later](#java)) |
| C# (dotnet core) | Experimental | `--force-enable-csharp` | netcoredbg | DotNet core |
| C# (mono) | Experimental | `--force-enable-csharp` | vscode-mono-debug | Mono |
| Python.legacy | Legacy | `--force-enable-python.legacy` | vscode-python | Node 10, Python 2.7 or Python 3 |
## Other languages
Vimspector should work for any debug adapter that works in Visual Studio Code.
To use Vimspector with a language that's not "built-in", see this
[wiki page](https://github.com/puremourning/vimspector/wiki/languages).
# Installation
## Quick Start
There are 2 installation methods:
* Using a release tarball and vim packages
* Using a clone of the repo (e.g. package manager)
Release tarballs come with debug adapters for the default languages
pre-packaged. To use a release tarball:
1. Check the dependencies
2. Untar the release tarball for your OS into `$HOME/.vim/pack`:
```
$ mkdir -p $HOME/.vim/pack
$ curl -L <url> | tar -C $HOME/.vim/pack zxvf -
```
3. Add `packadd! vimspector` to you `.vimrc`
4. (optionally) Enable the default set of mappings:
```
let g:vimspector_enable_mappings = 'HUMAN'
```
3. Configure your project's debug profiles (create `.vimspector.json`)
Alternatively, you can clone the repo and select which gadgets are installed:
1. Check the dependencies
1. Install the plugin as a Vim package. See `:help packages`.
2. Add `packadd! vimspector` to you `.vimrc`
2. Install some 'gadgets' (debug adapters) - see `:VimspectorInstall ...`
3. Configure your project's debug profiles (create `.vimspector.json`)
If you prefer to use a plugin manager, see the plugin manager's docs. For
Vundle, use:
```vim
Plugin 'puremourning/vimspector'
```
The following sections expand on the above brief overview.
## Dependencies
Vimspector requires:
* One of:
* Vim 8.2 Huge build compiled with Python 3.6 or later
* Neovim 0.4.3 with Python 3.6 or later (experimental)
* One of the following operating systems:
* Linux
* macOS Mojave or later
* Windows (experimental)
Why such a new vim ? Well 2 reasons:
1. Because vimspector uses a lot of new Vim features
2. Because there are Vim bugs that vimspector triggers that will frustrate you
if you hit them.
Why is neovim experimental? Because the author doesn't use neovim regularly, and
there are no regression tests for vimspector in neovim, so it's likely to break
frequently. Issue reports are handled on best-efforts basis, and PRs are
welcome to fix bugs. See also the next section descibing differences for neovim
vs vim.
Why Windows support experimental? Because it's effort and it's not a priority
for the author. PRs are welcome to fix bugs. Windows will not be regularly
tested.
Which Linux versions? I only test on Ubuntu 18.04 and later and RHEL 7.
## Neovim differences
neovim doesn't implement some features Vimspector relies on:
* WinBar - used for the buttons at the top of the code window and for changing
the output window's current output.
* Prompt Buffers - used to send commands in the Console and add Watches.
(*Note*: prompt buffers are available in neovim nightly)
* Balloons - used to display the values of variables when debugging.
Workarounds are in place as follows:
* WinBar - There are [mappings](#mappings),
[`:VimspectorShowOutput`](#program-output) and
[`:VimspectorReset`](#closing-debugger)
* Prompt Buffers - There are [`:VimspectorEval`](#console)
and [`:VimspectorWatch`](#watches)
There is no workaroud for the lack of balloons; you'll just have to use
`:VimspectorEval` or `:VimspectorWatch`, or switch to Vim.
## Windows differences
The following features are not implemented for Windows:
* Tailing the vimspector log in the Output Window.
## Trying it out
If you just want to try out vimspector without changing your vim config, there
are example projects for a number of languages in `support/test`, including:
* Python (`support/test/python/simple_python`)
* Go (`support/test/go/hello_world`)
* Nodejs (`support/test/node/simple`)
* Chrome (`support/test/chrome/`)
* etc.
To test one of these out, cd to the directory and run:
```
vim -Nu /path/to/vimspector/tests/vimrc --cmd "let g:vimspector_enable_mappings='HUMAN'"
```
Then press `<F5>`.
There's also a C++ project in `tests/testdata/cpp/simple/` with a `Makefile`
which can be used to check everything is working. This is used by the regression
tests in CI so should always work, and is a good way to check if the problem is
your configuration rather than a bug.
## Cloning the plugin
If you're not using a release tarball, you'll need to clone this repo to the
appropriate place.
1. Clone the plugin
There are many Vim plugin managers, and I'm not going to state a particular
preference, so if you choose to use one, follow the plugin manager's
documentation. For example, for Vundle, use:
```viml
Plugin 'puremourning/vimspector'
```
If you don't use a plugin manager already, install vimspector as a Vim package
by cloning this repository into your package path, like this:
```
$ git clone https://github.com/puremourning/vimspector ~/.vim/pack/vimspector/opt/vimspector
```
2. Configure vimspector in your `.vimrc`, for example to enable the standard
mapings:
```viml
let g:vimspector_enable_mappings = 'HUMAN'
```
3. Load vimspector at runtime. This can also be added to your `.vimrc` after
configuring vimspector:
```
packadd! vimspector
```
See support/doc/example_vimrc.vim for a minimal example.
## Install some gadgets
Vimspector is a generic client for Debug Adapters. Debug Adapters (referred to
as 'gadgets' or 'adapters') are what actually do the work of talking to the real
debugers.
In order for Vimspector to be useful, you need to have some adapters installed.
There are a few ways to do this:
* If you downloaded a tarball, gadgets for main supported langauges are already
installed for you.
* Using `:VimspectorInstall <adapter> <args...>` (use TAB `wildmenu` to see the
options, also accepts any `install_gadget.py` option)
* Using `python3 install_gadget.py <args>` (use `--help` to see all options)
* Attempting to launch a debug configuration; if the configured adapter
can't be found, vimspector will suggest installing one.
* Using `:VimspectorUpdate` to install the latest supported versions of the
gadgets.
Here's a demo of doing somee installs and an upgrade:
[![asciicast](https://asciinema.org/a/Hfu4ZvuyTZun8THNen9FQbTay.svg)](https://asciinema.org/a/Hfu4ZvuyTZun8THNen9FQbTay)
Both `install_gadget.py` and `:VimspectorInstall` do the same set of things,
though the default behaviours are slightly different. For supported languages,
they will:
* Download the relevant debug adapter at a version that's been tested from the
internet, either as a 'vsix' (Visusal Studio plugin), or clone from GitHub. If
you're in a corporate environment and this is a problem, you may need to
install the gadgets manually.
* Perform any necessary post-installation actions, such as:
* Building any binary components
* Ensuring scripts are executable, because the VSIX pacakges are usually
broken in this regard.
* Set up the `gadgetDir` symlinks for the platform.
For example, to install the tested debug adapter for a language, run:
| To install | Script | Command |
| --- | --- | --- |
| `<adapter>` | | `:VimspectorInstall <adapter>` |
| `<adapter1>`, `<adapter2>`, ... | | `:VimspectorInstall <adapter1> <adapter2> ...` |
| `<language>` | `./install_gadget.py --enable-<language> ...` | `:VimspectorInstall --enable-<language> ...` |
| Supported adapters | `./install_gadget.py --all` | `:VimspectorInstall --all` |
| Supported adapters, but not TCL | `./install_gadget.py --all --disable-tcl` | `:VimspectorInstall --all --disable-tcl` |
| Supported and experimental adapters | `./install_gadget.py --all --force-all` | `:VimspectorInstall --all` |
| Adapter for specific debug config | | Suggested by Vimspector when starting debugging |
### VimspectorInstall and VimspectorUpdate commands
`:VimspectorInstall` runs `install_gadget.py` in the background with some of
the options defaulted.
`:VimspectorUpdate` runs `install_gadget.py` to re-install (i.e. update) any
gadgets already installed in your `.gadgets.json`.
The output is minimal, to see the full output add `--verbose` to the command, as
in `:VimspectorInstall --verbose ...` or `:VimspectorUpdate --verbose ...`.
If the installation is successful, the output window is closed (and the output
lost forever). Use a `!` to keep it open (e.g. `:VimspectorInstall! --verbose
--all` or `:VimspectorUpdate!` (etc.).
If you know in advance which gadgets you want to install, for example so that
you can reproduce your config from source control, you can set
`g:vimspector_install_gadgets` to a list of gadgets. This will be used when:
* Running `:VimspectorInstall` with no arguments, or
* Running `:VimspectorUpdate`
For example:
```viml
let g:vimspector_install_gadgets = [ 'debugpy', 'vscode-cpptools', 'CodeLLDB' ]
```
### install\_gadget.py
By default `install_gadget.py` will overwrite your `.gadgets.json` with the set
of adapters just installed, whereas `:VimspectorInstall` will _update_ it,
overwriting only newly changed or installed adapters.
If you want to just add a new adapter using the script without destroying the
existing ones, add `--update-gadget-config`, as in:
```bash
$ ./install_gadget.py --enable-tcl
$ ./install_gadget.py --enable-rust --update-gadget-config
$ ./install_gadget.py --enable-java --update-gadget-config
```
If you want to maintain `configurations` outside of the vimspector repository
(this can be useful if you have custom gadgets or global configurations),
you can tell the installer to use a different basedir, then set
`g:vimspector_base_dir` to point to that directory, for example:
```bash
$ ./install_gadget.py --basedir $HOME/.vim/vimspector-config --all --force-all
```
Then add this to your `.vimrc`:
```viml
let g:vimspector_base_dir=expand( '$HOME/.vim/vimspector-config' )
```
When usnig `:VimspectorInstall`, the `g:vimspector_base_dir` setting is
respected unless `--basedir` is manually added (not recommended).
See `--help` for more info on the various options.
## Manual gadget installation
If the language you want to debug is not in the supported list above, you can
probably still make it work, but it's more effort.
You essentially need to get a working installation of the debug adapter, find
out how to start it, and configure that in an `adapters` entry in either your
`.vimspector.json` or in `.gadgets.json`.
The simplest way in practice is to install or start Visusal Studio Code and use
its extension manager to install the relevant extension. You can then configure
the adapter manually in the `adapters` section of your `.vimspector.json` or in
a `gadgets.json`.
PRs are always welcome to add supported languages (which roughly translates to
updating `python/vimspector/gadgets.py` and testing it).
### The gadget directory
Vimspector uses the following directory by default to look for a file named
`.gadgets.json`: `</path/to/vimspector>/gadgets/<os>`.
This path is exposed as the vimspector _variable_ `${gadgetDir}`. This is useful
for configuring gadget command lines.
Where os is one of:
* `macos`
* `linux`
* `windows` (though note: Windows is not supported)
The format is the same as `.vimspector.json`, but only the `adapters` key is
used:
Example:
```json
{
"adapters": {
"lldb-vscode": {
"variables": {
"LLVM": {
"shell": "brew --prefix llvm"
}
},
"attach": {
"pidProperty": "pid",
"pidSelect": "ask"
},
"command": [
"${LLVM}/bin/lldb-vscode"
],
"env": {
"LLDB_LAUNCH_FLAG_LAUNCH_IN_TTY": "YES"
},
"name": "lldb"
},
"vscode-cpptools": {
"attach": {
"pidProperty": "processId",
"pidSelect": "ask"
},
"command": [
"${gadgetDir}/vscode-cpptools/debugAdapters/OpenDebugAD7"
],
"name": "cppdbg"
},
"vscode-python": {
"command": [
"node",
"${gadgetDir}/vscode-python/out/client/debugger/debugAdapter/main.js"
],
"name": "vscode-python"
}
}
}
```
The gadget file is automatically written by `install_gadget.py` (or
`:VimspectorInstall`).
Vimspector will also load any fies matching:
`</path/to/vimspector>/gadgets/<os>/.gadgets.d/*.json`. These have the same
format as `.gadgets.json` but are not overwritten when running
`install_gadget.py`.
## Upgrade
After updating the Vimspector code (either via `git pull` or whatever package
manager), run `:VimspectorUpdate` to update any already-installed gadets.
# About
## Background
The motivation is that debugging in Vim is a pretty horrible experience,
particularly if you use multiple languages. With pyclewn no more and the
built-in termdebug plugin limited to gdb, I wanted to explore options.
While Language Server Protocol is well known, the Debug Adapter Protocol is less
well known, but achieves a similar goal: language agnostic API abstracting
debuggers from clients.
The aim of this project is to provide a simple but effective debugging
experience in Vim for multiple languages, by leveraging the debug adapters that
are being built for Visual Studio Code.
The ability to do remote debugging is a must. This is key to my workflow, so
baking it in to the debugging experience is a top bill goal for the project. So
vimspector has first-class support for executing programs remotely and attaching
to them. This support is unique to vimspector and on top of (complementary to)
any such support in actual debug adapters.
## Status
Vimspector is a work in progress, and any feedback/contributions are more
than welcome.
The backlog can be [viewed on Trello](https://trello.com/b/yvAKK0rD/vimspector).
### Experimental
The plugin is currently _experimental_. That means that any part of it
can (and probably will) change, including things like:
- breaking changes to the configuration
- keys, layout, functionatlity of the UI
However, I commit to only doing this in the most extreme cases and to annouce
such changes on Gitter well in advance. There's nothing more annoying than stuff
just breaking on you. I get that.
# Mappings
By default, vimspector does not change any of your mappings. Mappings are very
personal and so you should work out what you like and use vim's powerful mapping
features to set your own mappings. To that end, Vimspector defines the following
`<Plug>` mappings:
* `<Plug>VimspectorContinue`
* `<Plug>VimspectorStop`
* `<Plug>VimspectorRestart`
* `<Plug>VimspectorPause`
* `<Plug>VimspectorToggleBreakpoint`
* `<Plug>VimspectorToggleConditionalBreakpoint`
* `<Plug>VimspectorAddFunctionBreakpoint`
* `<Plug>VimspectorStepOver`
* `<Plug>VimspectorStepInto`
* `<Plug>VimspectorStepOut`
* `<Plug>VimspectorRunToCursor`
These map roughly 1-1 with the API functions below.
For example, if you want `<F5>` to start/continue debugging, add this to some
appropriate place, such as your `vimrc` (hint: run `:e $MYVIMRC`).
```viml
nmap <F5> <Plug>VimspectorContinue
```
That said, many people are familiar with particular debuggers, so the following
mappings can be enabled by setting `g:vimspector_enable_mappings` to the
specified value.
Please note: Currently there are no `<plug>` mappings. These will be added in
future to make custom mappings much easier.
## Visual Studio / VSCode
To use Visual Studio-like mappings, add the following to your `vimrc` **before
loading vimspector**:
```viml
let g:vimspector_enable_mappings = 'VISUAL_STUDIO'
```
| Key | Function | API |
| --- | --- | --- |
| `F5` | When debugging, continue. Otherwise start debugging. | `vimspector#Continue()` |
| `Shift F5` | Stop debugging. | `vimspector#Stop()` |
| `Ctrl Shift F5` | Restart debugging with the same configuration. | `vimspector#Restart()` |
| `F6` | Pause debugee. | `vimspector#Pause()` |
| `F9` | Toggle line breakpoint on the current line. | `vimspector#ToggleBreakpoint()` |
| `Shift F9` | Add a function breakpoint for the expression under cursor | `vimspector#AddFunctionBreakpoint( '<cexpr>' )` |
| `F10` | Step Over | `vimspector#StepOver()` |
| `F11` | Step Into | `vimspector#StepInto()` |
| `Shift F11` | Step out of current function scope | `vimspector#StepOut()` |
## Human Mode
If, like me, you only have 2 hands and 10 fingers, you probably don't like
Ctrl-Shift-F keys. Also, if you're running in a terminal, there's a real
possibility of terminfo being wrong for shifted-F-keys, particularly if your
`TERM` is `screen-256color`. If these issues (number of hands, `TERM` variables)
are unfixable, try the following mappings, by adding the following **before
loading vimspector**:
```viml
let g:vimspector_enable_mappings = 'HUMAN'
```
| Key | Function | API |
| --- | --- | --- |
| `F5` | When debugging, continue. Otherwise start debugging. | `vimspector#Continue()` |
| `F3` | Stop debugging. | `vimspector#Stop()` |
| `F4` | Restart debugging with the same configuration. | `vimspector#Restart()` |
| `F6` | Pause debugee. | `vimspector#Pause()` |
| `F9` | Toggle line breakpoint on the current line. | `vimspector#ToggleBreakpoint()` |
| `<leader>F9` | Toggle conditional line breakpoint on the current line. | `vimspector#ToggleBreakpoint( { trigger expr, hit count expr } )` |
| `F8` | Add a function breakpoint for the expression under cursor | `vimspector#AddFunctionBreakpoint( '<cexpr>' )` |
| `<leader>F8` | Run to Cursor | `vimspector#RunToCursor()` |
| `F10` | Step Over | `vimspector#StepOver()` |
| `F11` | Step Into | `vimspector#StepInto()` |
| `F12` | Step out of current function scope | `vimspector#StepOut()` |
# Usage
## Launch and attach by PID:
* Create `.vimspector.json`. See [below](#supported-languages).
* `:call vimspector#Launch()` and select a configuration.
![debug session](https://puremourning.github.io/vimspector-web/img/vimspector-overview.png)
### Launch with options
To launch a specific debug configuration, or specify [replacement
variables][vimspector-ref-var] for the launch, you can use:
* `:call vimspector#LaunchWithSettings( dict )`
The argument is a `dict` with the following keys:
* `configuration`: (optional) Name of the debug configuration to launch
* `<anything else>`: (optional) Name of a variable to set
This allows for some intergration and automation. For example, if you have a
configuration named `Run Test` that contains a [replacement
variable][vimspector-ref-var] named `${Test}` you could write a mapping which
ultimately executes:
```viml
vimspector#LaunchWithSettings( #{ configuration: 'Run Test'
\ Test: 'Name of the test' } )
```
This would start the `Run Test` configuration with `${Test}` set to `'Name of
the test'` and Vimspector would _not_ prompt the user to enter or confirm these
things.
See [our YouCompleteMe integration guide](#usage-with-youcompleteme) for
another example where it can be used to specify the port to connect the [java
debugger](#java---partially-supported)
### Debug configuration selection
Vimspector uses the following logic to choose a configuration to launch:
1. If a configuration was specified in the launch options (as above), use that.
2. Otherwise if there's only one configuration and it doesn't have `autoselect`
set to `false`, use that.
3. Otherwise if there's exactly one configuration with `default` set to `true`
and without `autoselect` set to `false`, use that.
4. Otherwise, prompt the user to select a configuration.
See [the reference guide][vimspector-ref-config-selection] for details.
### Get configurations
* Use `vimspector#GetConfigurations()` to get a list of configurations
For example, to get an array of configurations and fuzzy matching on the result
```viml
:call matchfuzzy(vimspector#GetConfigurations(), "test::case_1")
```
## Breakpoints
* Use `vimspector#ToggleBreakpoint([ { 'condition': '<condition expr>' } ])`
to set/disable/delete a line breakpoint, with optional condition.
* Use `vimspector#AddFunctionBreakpoint( '<name>' [, { 'condition': '<condition expr>' } ] )`
to add a function breakpoint with optional condition.
Both of these functions take a single optional argument which is a dictionary of
options. The dictionary can have the following keys:
* `condition`: An optional expression evaluated to deterimie if the breakpoint
should fire. Not supported by all debug adapters. For example, to break when
`abc` is `10`, enter something like `abc == 10`, depending on the language.
* `hitCondition`: An optional expression evaluated to determine a number of
times the breakpoint should be ignored. Should (probablty?) not be used in
combination with `condition`. Not supported by all debug adapters. For
example, to break on the 3rd time hitting this line, enter `3`.
In both cases, the expression is evaluated by the debugger, so should be in
whatever dialect the debugger understands when evaluating expressions.
When using the `<leader><F9>` mapping, the user is prompted to enter these
expressions in a command line (with history).
### Exception breakpoints
When starting debugging, you may be asekd a few questions about how to handle
exceptoins. These are "exception breakpoints" and vimspector remembers your
choices while Vim is still running.
Typically you can accept the defaults (just keep pressing `<CR>`!) as most debug
adapter defaults are sane, but if you want to break on, say `uncaught exception`
then answer `Y` to that (for example).
You can configure your choices in the `.vimspector.json`. See
[the configuration guide][vimspector-ref-exception] for details on that.
### Clear breakpoints
* Use `vimspector#ClearBreakpoints()`
to clear all breakpoints including the memory of exception breakpoint choices.
### Run to Cursor
* Use `vimspector#RunToCursor` or `<leader><F8>`: this creates a temporary
breakpoint on the current line, then continues execution, clearing the
breakpiont when it is hit.
## Stepping
* Step in/out, finish, continue, pause etc. using the WinBar, or mappings.
* If you really want to, the API is `vimspector#StepInto()` etc.
![code window](https://puremourning.github.io/vimspector-web/img/vimspector-code-window.png)
## Variables and scopes
* Current scope shows values of locals.
* Use `<CR>`, or double-click with left mouse to expand/collapse (+, -).
* When changing the stack frame the locals window updates.
* While paused, hover to see values
![locals window](https://puremourning.github.io/vimspector-web/img/vimspector-locals-window.png)
Scopes and variables are represented by the buffer `vimspector.Variables`.
## Watches
The watch window is used to inspect variables and expressions. Expressions are
evaluated in the selected stack frame which is "focussed"
The watches window is a prompt buffer, where that's available. Enter insert mode
to add a new watch expression.
* Add watches to the variables window by entering insert mode and
typing the expression. Commit with `<CR>`.
* Alternatively, use `:VimspectorWatch <expression>`. Tab-completion for
expression is available in some debug adapters.
* Expand result with `<CR>`, or double-click with left mouse.
* Delete with `<DEL>`.
![watch window](https://puremourning.github.io/vimspector-web/img/vimspector-watch-window.png)
The watches are represented by the buffer `vimspector.StackTrace`.
### Watch autocompletion
The watch prompt buffer has its `omnifunc` set to a function that will
calcualte completion for the current expression. This is trivailly used with
`<Ctrl-x><Ctrl-o>` (see `:help ins-completion`), or integrated with your
favourite completion system. The filetype in the buffer is set to
`VimspectorPrompt`.
For YouCompleteMe, the following config works well:
```viml
let g:ycm_semantic_triggers = {
\ 'VimspectorPrompt': [ '.', '->', ':', '<' ]
}
```
## Stack Traces
The stack trace window shows the state of each progream thread. Threads which
are stopped can be expanded to show the strack trace of that thread.
Often, but not always, all threads are stopped when a breakpoint is hit. The
status of a thread is show in parentheses after the thread's name. Where
supported by the underlying debugger, threads can be paused and continued
individually from within the Stack Trace window.
A particular thread, highlighted with the `CursorLine` highlight group is the
"focussed" thread. This is the thread that receives commands like "Stop In",
"Stop Out", "Continue" and "Pause" in the code window. The focussed thread can
be changed manually to "switch to" that thread.
* Use `<CR>`, or double-click with left mouse to expand/collapse a thread stack
trace, or use the WinBar button.
* Use `<CR>`, or double-click with left mouse on a stack frame to jump to it.
* Use the WinBar or `vimspector#PauseContinueThread()` to individually pause or
continue the selected thread.
* Use the "Focus" WinBar button, `<leader><CR>` or `vimspector#SetCurrentThread()`
to set the "focussed" thread to the currently selected one. If the selected
line is a stack frame, set the focussed thread to the thread of that frame and
jump to that frame in the code window.
![stack trace](https://puremourning.github.io/vimspector-web/img/vimspector-callstack-window.png)
The stack trace is represented by the buffer `vimspector.StackTrace`.
## Program Output
* In the outputs window use the WinBar to select the output channel.
* Alternatively, use `:VimspectorShowOutput <category>`. Use command-line
completion to see the categories.
* The debugee prints to the stdout channel.
* Other channels may be useful for debugging.
![output window](https://puremourning.github.io/vimspector-web/img/vimspector-output-window.png)
If the output window is closed, a new one can be opened with
`:VimspectorShowOutput <category>` (use tab-completion - `wildmenu` to see the
options).
### Console
The console window is a prompt buffer, where that's available, and can be used
as an interactive CLI for the debug adapter. Support for this varies amongt
adapters.
* Enter insert mode to enter a command to evaluate.
* Alternatively, `:VimspectorEval <expression>`. Completion is available with
some debug adapters.
* Commit the request with `<CR>`
* The request and subsequent result are printed.
NOTE: See also [Watches](#watches) above.
If the output window is closed, a new one can be opened with
`:VimspectorShowOutput Console`.
### Console autocompletion
The console prompt buffer has its `omnifunc` set to a function that will
calcualte completion for the current command/expression. This is trivailly used
with `<Ctrl-x><Ctrl-o>` (see `:help ins-completion`), or integrated with your
favourite completion system. The filetype in the buffer is set to
`VimspectorPrompt`.
For YouCompleteMe, the following config works well:
```viml
let g:ycm_semantic_triggers = {
\ 'VimspectorPrompt': [ '.', '->', ':', '<' ]
}
```
### Log View
The Vimspector log file contains a full trace of the communication between
Vimspector and the debug adapter. This is the primary source of diagnostic
information when something goes wrong that's not a Vim traceback.
If you just want to see the Vimspector log file, use `:VimspectorToggleLog`,
which will tail it in a little window (doesn't work on Windows).
## Closing debugger
To close the debugger, use:
* `Reset` WinBar button (`set mouse=a`)
* `:VimspectorReset` when the WinBar is not available.
* `call vimspector#Reset()`
# Debug adapter configuration
For an introduction to the configuration of `.vimspector.json`, take a look at
the Getting Started section of the [Vimspector website][website].
For full explanation, including how to use variables, substitutions and how to
specify exception breakpoints, see [the docs][vimspector-ref].
The JSON configuration file allows C-style comments:
* `// comment to end of line ...`
* `/* inline comment ... */`
Current tested with the following debug adapters.
## C, C++, Rust, etc.
* [vscode-cpptools](https://github.com/Microsoft/vscode-cpptools)
* On macOS, I *strongly* recommend using [CodeLLDB](#rust) instead for C and C++
projects. It's really excellent, has fewer dependencies and doesn't open console
apps in another Terminal window.
Example `.vimspector.json` (works with both `vscode-cpptools` and `lldb-vscode`.
For `lldb-vscode` replace the name of the adapter with `lldb-vscode`:
* vscode-cpptools Linux/MacOS:
```
{
"configurations": {
"Launch": {
"adapter": "vscode-cpptools",
"configuration": {
"request": "launch",
"program": "<path to binary>",
"args": [ ... ],
"cwd": "<working directory>",
"environment": [ ... ],
"externalConsole": true,
"MIMode": "<lldb or gdb>"
}
},
"Attach": {
"adapter": "vscode-cpptools",
"configuration": {
"request": "attach",
"program": "<path to binary>",
"MIMode": "<lldb or gdb>"
}
}
...
}
}
```
* vscode-cpptools Windows
***NOTE FOR WINDOWS USERS:*** You need to install `gdb.exe`. I recommend using
`scoop install gdb`. Vimspector cannot use the visual studio debugger due to
licensing.
```
{
"configurations": {
"Launch": {
"adapter": "vscode-cpptools",
"configuration": {
"request": "launch",
"program": "<path to binary>",
"stopAtEntry": true
}
}
}
}
```
* CodeLLDB (MacOS)
CodeLLDB is superior to vscode-cpptools in a number of ways on macOS at least.
See [Rust](#rust).
* lldb-vscode (MacOS)
An alternative is to to use `lldb-vscode`, which comes with llvm. Here's how:
* Install llvm (e.g. with HomeBrew: `brew install llvm`)
* Create a file named
`/path/to/vimspector/gadgets/macos/.gadgets.d/lldb-vscode.json`:
```json
{
"adapters": {
"lldb-vscode": {
"variables": {
"LLVM": {
"shell": "brew --prefix llvm"
}
},
"attach": {
"pidProperty": "pid",
"pidSelect": "ask"
},
"command": [
"${LLVM}/bin/lldb-vscode"
],
"env": {
"LLDB_LAUNCH_FLAG_LAUNCH_IN_TTY": "YES"
},
"name": "lldb"
}
}
}
```
## Rust
Rust is supported with any gdb/lldb-based debugger. So it works fine with
`vscode-cpptools` and `lldb-vscode` above. However, support for rust is best in
[`CodeLLDB`](https://github.com/vadimcn/vscode-lldb#features).
* `./install_gadget.py --force-enable-rust` or `:VimspectorInstall CodeLLDB`
* Example: `support/test/rust/vimspector_test`
```json
{
"configurations": {
"launch": {
"adapter": "CodeLLDB",
"configuration": {
"request": "launch",
"program": "${workspaceRoot}/target/debug/vimspector_test"
}
}
}
}
```
* Docs: https://github.com/vadimcn/vscode-lldb/blob/master/MANUAL.md
### Remote debugging
The cpptools documentation describes how to attach cpptools to gdbserver using
`miDebuggerAddress`. Note that when doing this you should use the
`"request": "attach"`.
### Remote launch and attach
If you're feeling fancy, checkout the [reference guide][remote-debugging] for
an example of getting Vimspector to remotely launch and attach.
## Python
* Python: [debugpy][]
* Install with `install_gadget.py --enable-python` or `:VimspectorInstall
debugpy`, ideally requires a working compiler and the python development
headers/libs to build a C python extension for performance.
* Full options: https://github.com/microsoft/debugpy/wiki/Debug-configuration-settings
**Migrating from `vscode-python`**: change `"adapter": "vscode-python"` to
`"adapter": "debugpy"`.
```json
{
"configurations": {
"<name>: Launch": {
"adapter": "debugpy",
"configuration": {
"name": "<name>: Launch",
"type": "python",
"request": "launch",
"cwd": "<working directory>",
"python": "/path/to/python/interpreter/to/use",
"stopOnEntry": true,
"console": "externalTerminal",
"debugOptions": [],
"program": "<path to main python file>"
}
}
...
}
}
```
### Remote Debugging
In order to use remote debugging with debugpy, you have to connect Vimspector
directly to the application that is being debugged. This is easy, but it's a
little different from how we normally configure things. Specifically, you need
to:
* Start your application with debugpy, specifying the `--listen` argument. See
[the debugpy
documentation](https://github.com/microsoft/debugpy#debugpy-cli-usage) for
details.
* Use the built-in "multi-session" adapter. This just asks for the host/port to
connect to. For example:
```json
{
"configurations": {
"Python Attach": {
"adapter": "multi-session",
"configuration": {
"request": "attach",
"pathMappings": [
// mappings here (optional)
]
}
}
}
}
```
See [details of the launch
configuration](https://github.com/microsoft/debugpy/wiki/Debug-configuration-settings)
for explanation of things like `pathMappings`.
Additional documentation, including how to do this when the remote machine can
only be contacted via SSH [are provided by
debugpy](https://github.com/microsoft/debugpy/wiki/Debugging-over-SSH).
### Remote launch and attach
If you're feeling fancy, checkout the [reference guide][remote-debugging] for
an example of getting Vimspector to remotely launch and attach.
### Legacy: vscode-python
* No longer installed by default - please pass `--force-enable-python.legacy` if
you just want to continue using your working setup.
* [vscode-python](https://github.com/Microsoft/vscode-python)
* NOTE: You must be running `node` 10. See [this issue](https://github.com/puremourning/vimspector/issues/105)
```json
{
"configurations": {
"<name>: Launch": {
"adapter": "vscode-python",
"configuration": {
"name": "<name>: Launch",
"type": "python",
"request": "launch",
"cwd": "<working directory>",
"stopOnEntry": true,
"console": "externalTerminal",
"debugOptions": [],
"program": "<path to main python file>"
}
}
...
}
}
```
## TCL
* TCL (TclProDebug)
See [my fork of TclProDebug](https://github.com/puremourning/TclProDebug) for instructions.
## C♯
* C# - dotnet core
Install with `install_gadget.py --force-enable-csharp` or `:VimspectorInstall
netcoredbg`
```json
{
"configurations": {
"launch - netcoredbg": {
"adapter": "netcoredbg",
"configuration": {
"request": "launch",
"program": "${workspaceRoot}/bin/Debug/netcoreapp2.2/csharp.dll",
"args": [],
"stopAtEntry": true,
"cwd": "${workspaceRoot}"
}
}
}
}
```
* C# - mono
Install with `install_gadget.py --force-enable-csharp` or `:VimspectorInstall
vscode-mono-debug`.
***Known not to work.***
```json
{
"configurations": {
"launch - mono": {
"adapter": "vscode-mono-debug",
"configuration": {
"request": "launch",
"program": "${workspaceRoot}/bin/Debug/netcoreapp2.2/csharp.dll",
"args": [],
"cwd": "${workspaceRoot}",
"runtimeExecutable": "mono",
"runtimeArgs": [],
"env": [],
"externalConsole": false,
"console": "integratedTerminal"
}
}
}
}
```
## Go
* Go
Requires:
* `install_gadget.py --enable-go` or `:VimspectorInstall vscode-go`
* [Delve][delve-install] installed, e.g. `go get -u github.com/go-delve/delve/cmd/dlv`
* Delve to be in your PATH, or specify the `dlvToolPath` launch option
```json
{
"configurations": {
"run": {
"adapter": "vscode-go",
"configuration": {
"request": "launch",
"program": "${fileDirname}",
"mode": "debug",
"dlvToolPath": "$HOME/go/bin/dlv"
}
}
}
}
```
See the vscode-go docs for
[troubleshooting information](https://github.com/golang/vscode-go/blob/master/docs/debugging.md#troubleshooting)
## PHP
This uses the php-debug, see
https://marketplace.visualstudio.com/items?itemName=felixfbecker.php-debug
Requires:
* (optional) Xdebug helper for chrome https://chrome.google.com/webstore/detail/xdebug-helper/eadndfjplgieldjbigjakmdgkmoaaaoc
* `install_gadget.py --force-enable-php` or `:VimspectorInstall
vscode-php-debug`
* configured php xdebug extension
```ini
zend_extension=xdebug.so
xdebug.remote_enable=on
xdebug.remote_handler=dbgp
xdebug.remote_host=localhost
xdebug.remote_port=9000
```
replace `localhost` with the ip of your workstation.
lazy alternative
```ini
zend_extension=xdebug.so
xdebug.remote_enable=on
xdebug.remote_handler=dbgp
xdebug.remote_connect_back=true
xdebug.remote_port=9000
```
* .vimspectory.json
```json
{
"configurations": {
"Listen for XDebug": {
"adapter": "vscode-php-debug",
"configuration": {
"name": "Listen for XDebug",
"type": "php",
"request": "launch",
"port": 9000,
"stopOnEntry": false,
"pathMappings": {
"/var/www/html": "${workspaceRoot}"
}
}
},
"Launch currently open script": {
"adapter": "vscode-php-debug",
"configuration": {
"name": "Launch currently open script",
"type": "php",
"request": "launch",
"program": "${file}",
"cwd": "${fileDirname}",
"port": 9000
}
}
}
}
```
### Debug web application
append `XDEBUG_SESSION_START=xdebug` to your query string
```
curl "http://localhost?XDEBUG_SESSION_START=xdebug"
```
or use the previously mentioned Xdebug Helper extension (which sets a `XDEBUG_SESSION` cookie)
### Debug cli application
```
export XDEBUG_CONFIG="idekey=xdebug"
php <path to script>
```
## JavaScript, TypeScript, etc.
* Node.js
Requires:
* `install_gadget.py --force-enable-node`
* For installation, a Node.js environemt that is < node 12. I believe this is an
incompatibility with gulp. Advice, use [nvm][] with `nvm install --lts 10; nvm
use --lts 10; ./install_gadget.py --force-enable-node ...`
* Options described here:
https://code.visualstudio.com/docs/nodejs/nodejs-debugging
* Example: `support/test/node/simple`
```json
{
"configurations": {
"run": {
"adapter": "vscode-node",
"configuration": {
"request": "launch",
"protocol": "auto",
"stopOnEntry": true,
"console": "integratedTerminal",
"program": "${workspaceRoot}/simple.js",
"cwd": "${workspaceRoot}"
}
}
}
}
```
* Chrome
This uses the chrome debugger, see
https://marketplace.visualstudio.com/items?itemName=msjsdiag.debugger-for-chrome.
It allows you to debug scripts running inside chrome from within Vim.
* `./install_gadget.py --force-enable-chrome` or `:VimspectorInstall
debugger-for-chrome`
* Example: `support/test/chrome`
```json
{
"configurations": {
"launch": {
"adapter": "chrome",
"configuration": {
"request": "launch",
"url": "http://localhost:1234/",
"webRoot": "${workspaceRoot}/www"
}
}
}
}
```
## Java
Vimspector works well with the [java debug server][java-debug-server], which
runs as a jdt.ls (Java Language Server) plugin, rather than a standalone
debug adapter.
Vimspector is not in the business of running language servers, only debug
adapters, so this means that you need a compatible Language Server Protocol
editor plugin to use Java. I recommend [YouCompleteMe][], which has full support
for jdt.ls, and most importantly a trivial way to load the debug adapter and to
use it with Vimspector.
### Usage with YouCompleteMe
* Set up [YCM for java][YcmJava].
* Get Vimspector to download the java debug plugin:
`install_gadget.py --force-enable-java <other options...>` or
`:VimspectorInstall java-debug-adapter`
* Configure Vimspector for your project using the `vscode-java` adapter, e.g.:
```json
{
"configurations": {
"Java Attach": {
"adapter": "vscode-java",
"configuration": {
"request": "attach",
"hostName": "${host}",
"port": "${port}",
"sourcePaths": [
"${workspaceRoot}/src/main/java",
"${workspaceRoot}/src/test/java"
]
}
}
}
}
```
* Tell YCM to load the debugger plugin. This should be the `gadgets/<os>`
directory, not any specific adapter. e.g. in `.vimrc`
```viml
" Tell YCM where to find the plugin. Add to any existing values.
let g:ycm_java_jdtls_extension_path = [
\ '</path/to/Vimspector/gadgets/<os>'
\ ]
```
* Create a mapping, such as `<leader><F5>` to start the debug server and launch
vimspector, e.g. in `~/.vim/ftplugin/java.vim`:
```viml
let s:jdt_ls_debugger_port = 0
function! s:StartDebugging()
if s:jdt_ls_debugger_port <= 0
" Get the DAP port
let s:jdt_ls_debugger_port = youcompleteme#GetCommandResponse(
\ 'ExecuteCommand',
\ 'vscode.java.startDebugSession' )
if s:jdt_ls_debugger_port == ''
echom "Unable to get DAP port - is JDT.LS initialized?"
let s:jdt_ls_debugger_port = 0
return
endif
endif
" Start debugging with the DAP port
call vimspector#LaunchWithSettings( { 'DAPPort': s:jdt_ls_debugger_port } )
endfunction
nnoremap <silent> <buffer> <Leader><F5> :call <SID>StartDebugging()<CR>
```
You can then use `<Leader><F5>` to start debugging rather than just `<F5>`.
If you see "Unable to get DAP port - is JDT.LS initialized?", try running
`:YcmCompleter ExecuteCommand vscode.java.startDebugSession` and note the
output. If you see an error like `ResponseFailedException: Request failed:
-32601: No delegateCommandHandler for vscode.java.startDebugSession`, make sure
that:
* Your YCM jdt.ls is actually working, see the
[YCM docs](https://github.com/ycm-core/YouCompleteMe#troubleshooting) for
troubleshooting
* The YCM jdt.ls has had time to initialize before you start the debugger
* That `g:ycm_java_jdtls_extension_path` is set in `.vimrc` or prior to YCM
starting
For the launch arguments, see the
[vscode document](https://code.visualstudio.com/docs/java/java-debugging).
### Other LSP clients
See [this issue](https://github.com/puremourning/vimspector/issues/3) for more
background.
## Lua
Lua is supported through
[local-lua-debugger-vscode](https://github.com/tomblind/local-lua-debugger-vscode).
This debugger uses stdio to communicate with the running process, so calls to
`io.read` will cause problems.
* `./install_gadget.py --enable-lua` or `:VimspectorInstall local-lua-debugger-vscode`
* Examples: `support/test/lua/simple` and `support/test/lua/love`
```json
{
"$schema": "https://puremourning.github.io/vimspector/schema/vimspector.schema.json#",
"configurations": {
"lua": {
"adapter": "lua-local",
"configuration": {
"request": "launch",
"type": "lua-local",
"cwd": "${workspaceFolder}",
"program": {
"lua": "lua",
"file": "${file}"
}
}
},
"luajit": {
"adapter": "lua-local",
"configuration": {
"request": "launch",
"type": "lua-local",
"cwd": "${workspaceFolder}",
"program": {
"lua": "luajit",
"file": "${file}"
}
}
},
"love": {
"adapter": "lua-local",
"configuration": {
"request": "launch",
"type": "lua-local",
"cwd": "${workspaceFolder}",
"program": {
"command": "love"
},
"args": ["${workspaceFolder}"]
}
}
}
}
```
## Other servers
* Java - vscode-javac. This works, but is not as functional as Java Debug
Server. Take a look at [this
comment](https://github.com/puremourning/vimspector/issues/3#issuecomment-576916076)
for instructions.
# Customisation
There is very limited support for customistaion of the UI.
## Changing the default signs
Vimsector uses the following signs internally. If they are defined before
Vimsector uses them, they will not be replaced. So to customise the signs,
define them in your `vimrc`.
| Sign | Description | Priority |
|------------------------|-------------------------------------|----------|
| `vimspectorBP` | Line breakpoint | 9 |
| `vimspectorBPCond` | Conditional line breakpiont | 9 |
| `vimspectorBPDisabled` | Disabled breakpoint | 9 |
| `vimspectorPC` | Program counter (i.e. current line) | 200 |
| `vimspectorPCBP` | Program counter and breakpoint | 200 |
The default symbols are the equivalent of something like the following:
```viml
sign define vimspectorBP text=\ ● texthl=WarningMsg
sign define vimspectorBPCond text=\ ◆ texthl=WarningMsg
sign define vimspectorBPDisabled text=\ ● texthl=LineNr
sign define vimspectorPC text=\ ▶ texthl=MatchParen linehl=CursorLine
sign define vimspectorPCBP text=●▶ texthl=MatchParen linehl=CursorLine
```
If the signs don't display properly, your font probably doesn't contain these
glyphs. You can easily change them by deifining the sign in your vimrc. For
example, you could put this in your `vimrc` to use some simple ASCII symbols:
```viml
sign define vimspectorBP text=o texthl=WarningMsg
sign define vimspectorBPCond text=o? texthl=WarningMsg
sign define vimspectorBPDisabled text=o! texthl=LineNr
sign define vimspectorPC text=\ > texthl=MatchParen
sign define vimspectorPCBP text=o> texthl=MatchParen
```
## Sign priority
Many different plugins provide signs for various purposes. Examples include
diagnostic signs for code errors, etc. Vim provides only a single priority to
determine which sign should be displayed when multiple signs are placed at a
single line. If you are finding that other signs are interfering with
vimspector's (or vice-versa), you can customise the priority used by vimspector
by setting the following dictionary:
```viml
let g:vimspector_sign_priority = {
\ '<sign-name>': <priority>,
\ }
```
For example:
```viml
let g:vimspector_sign_priority = {
\ 'vimspectorBP': 3,
\ 'vimspectorBPCond': 2,
\ 'vimspectorBPDisabled': 1,
\ 'vimspectorPC': 999,
\ }
```
All keys are optional. If a sign is not customised, the default priority it used
(as shown above).
See `:help sign-priority`. The default priority is 10, larger numbers override
smaller ones.
## Changing the default window sizes
> ***Please Note***: This cusomiation API is ***unstable***, meaning that it may
change at any time. I will endeavour to reduce the impact of this and annouce
changes in Gitter.
The following options control the default sizes of the UI windows (all of them
are numbers)
- `g:vimspector_sidebar_width` (default: 50 columns):
The width in columns of the left utility windows (variables, watches, stack
trace)
- `g:vimspector_bottombar_height` (default 10 lines):
The height in rows of the output window below the code window.
Example:
```viml
let g:vimspector_sidebar_width = 75
let g:vimspector_bottombar_height = 15
```
## Changing the terminal size
The terminal is typically created as a vertical split to the righ of the code
window, and that window is re-used for subsequent terminal buffers.
The following control the sizing of the terminal window used
for debuggee input/output when using Vim's built-in terminal.
- `g:vimspector_code_minwidth` (default: 82 columns):
Minimum number of columns to try and maintain for the code window when
splitting to create the terminal window.
- `g:vimspector_terminal_maxwidth` (default: 80 columns):
Maximum number of columns to use for the terminal.
- `g:vimspector_terminal_minwidth` (default: 10 columns):
Minimum number of columns to use when it is not possible to fit
`g:vimspector_terminal_maxwidth` columns for the terminal.
That's a lot of options, but essentially we try to make sure that there are at
least `g:vimspector_code_minwidth` columns for the main code window and that the
terminal is no wider than `g:vimspector_terminal_maxwidth` columns.
`g:vimspector_terminal_minwidth` is there to ensure that there's a reasonable
number of columns for the terminal even when there isn't enough horizontal space
to satisfy the other contraints.
Example:
```viml
let g:vimspector_code_minwidth = 90
let g:vimspector_terminal_maxwidth = 75
let g:vimspector_terminal_minwidth = 20
```
## Advanced UI customisation
> ***Please Note***: This cusomiation API is ***unstable***, meaning that it may
change at any time. I will endeavour to reduce the impact of this and annouce
changes in Gitter.
The above customisation of window sizes is limited intentionally to keep things
simple. Vimspector also provides a way for you to customise the UI without
restrictions, by running a `User` autocommand just after creating the UI or
opening the terminal. This requires you to write some vimscript, but allows you
to do things like:
* Hide a particular window or windows
* Move a particular window or windows
* Resize windows
* Have multiple windows for a particular buffer (say, you want 2 watch windows)
* etc.
You can essentially do anything you could do manually by writing a little
vimscript code.
The `User` autocommand is raised with `pattern` set with the following values:
* `VimspectorUICreated`: Just after setting up the UI for a debug session
* `VimspectorTerminalOpened`: Just after opening the terminal window for program
input/output.
The following global variable is set up for you to get access to the UI
elements: `g:vimspector_session_windows`. This is a `dict` with the following
keys:
* `g:vimspector_session_windows.tagpage`: The tab page for the session
* `g:vimspector_session_windows.variables`: Window ID of the variables window,
containing the `vimspector.Variables` buffer.
* `g:vimspector_session_windows.watches`: Window ID of the watches window,
containng the `vimspector.Watches` buffer.
* `g:vimspector_session_windows.stack_trace`: Window ID of the stack trade
window containing the `vimspector.StackTrace` buffer.
* `g:vimspector_session_windows.code`: Window ID of the code window.
* `g:vimspector_session_windows.output`: Window ID of the output window.
In addition, the following key is added when triggering the
`VimspectorTerminalOpened` event:
* `g:vimspector_session_windows.terminal`: Window ID of the terminal window
## Customising the WinBar
You can even customise the WinBar buttons by simply running the usual `menu`
(and `unmanu`) commands.
By default, Vimspector uses something a bit like this:
```viml
nnoremenu WinBar.■\ Stop :call vimspector#Stop()<CR>
nnoremenu WinBar.▶\ Cont :call vimspector#Continue()<CR>
nnoremenu WinBar.▷\ Pause :call vimspector#Pause()<CR>
nnoremenu WinBar.↷\ Next :call vimspector#StepOver()<CR>
nnoremenu WinBar.→\ Step :call vimspector#StepInto()<CR>
nnoremenu WinBar.←\ Out :call vimspector#StepOut()<CR>
nnoremenu WinBar.⟲: :call vimspector#Restart()<CR>
nnoremenu WinBar.✕ :call vimspector#Reset()<CR>
```
If you prefer a different layout or if the unicode symbols don't render
correctly in your font, you can customise this in the `VimspectorUICreated`
autocommand, for example:
```viml
func! CustomiseUI()
call win_gotoid( g:vimspector_session_windows.code )
" Clear the existing WinBar created by Vimspector
nunmenu WinBar
" Cretae our own WinBar
nnoremenu WinBar.Kill :call vimspector#Stop()<CR>
nnoremenu WinBar.Continue :call vimspector#Continue()<CR>
nnoremenu WinBar.Pause :call vimspector#Pause()<CR>
nnoremenu WinBar.Step\ Over :call vimspector#StepOver()<CR>
nnoremenu WinBar.Step\ In :call vimspector#StepInto()<CR>
nnoremenu WinBar.Step\ Out :call vimspector#StepOut()<CR>
nnoremenu WinBar.Restart :call vimspector#Restart()<CR>
nnoremenu WinBar.Exit :call vimspector#Reset()<CR>
endfunction
augroup MyVimspectorUICustomistaion
autocmd!
autocmd User VimspectorUICreated call s:CustomiseUI()
augroup END
```
## Example
There is some example code in `support/custom_ui_vimrc` showing how you can use
the window IDs to modify various aspects of the UI using some basic vim
commands, primarily `win_gotoid` funciton and the `wincmd` ex command.
To try this out `vim -Nu support/custom_ui_vimrc <some file>`.
Here's a rather smaller example. A simple way to use this is to drop it into a
file named `my_vimspector_ui.vim` in `~/.vim/plugin` (or paste into your
`vimrc`):
```viml
" Set the basic sizes
let g:vimspector_sidebar_width = 80
let g:vimspector_code_minwidth = 85
let g:vimspector_terminal_minwidth = 75
function! s:CustomiseUI()
" Customise the basic UI...
" Close the output window
call win_gotoid( g:vimspector_session_windows.output )
q
endfunction
function s:SetUpTerminal()
" Customise the terminal window size/position
" For some reasons terminal buffers in Neovim have line numbers
call win_gotoid( g:vimspector_session_windows.terminal )
set norelativenumber nonumber
endfunction
augroup MyVimspectorUICustomistaion
autocmd!
autocmd User VimspectorUICreated call s:CustomiseUI()
autocmd User VimspectorTerminalOpened call s:SetUpTerminal()
augroup END
```
# FAQ
1. Q: Does it work? A: Yeah. It's a bit unpolished.
2. Q: Does it work with _this_ language? A: Probably, but it won't
necessarily be easy to work out what to put in the `.vimspector.json`. As you
can see above, some of the servers aren't really editor agnostic, and require
very-specific unique handling.
3. How do I stop it starting a new Terminal.app on macOS? See [this
comment](https://github.com/puremourning/vimspector/issues/90#issuecomment-577857322)
4. Can I specify answers to the annoying questions about exception breakpoints
in my `.vimspector.json` ? Yes, see [here][vimspector-ref-exception].
5. Do I have to specify the file to execute in `.vimspector.json`, or could it be the current vim file?
You don't need to. You can specify $file for the current active file. See [here][vimspector-ref-var] for complete list of replacements in the configuration file.
6. You allow comments in `.vimspector.json`, but Vim highlights these as errors,
do you know how to make this not-an-error? Yes, put this in
`~/.vim/after/syntax/json.vim`:
```viml
syn region jsonComment start="/\*" end="\*/"
hi link jsonCommentError Comment
hi link jsonComment Comment
```
7. What is the difference between a `gadget` and an `adapter`? A gadget is
somethin you install with `:VimspectorInstall` or `install_gadget.py`, an
`adapter` is something that Vimspector talks to (actually it's the Vimspector
config describing that thing). These are _usually_ one-to-one,
but in theory a single gadget can supply multiple `adapter` configs.
Typically this happens when a `gadget` supplies different `adapter` config
for, say remote debugging, or debugging in a container, etc.
8. The signs and winbar display funny symbols. How do i fix them? See
[this](#changing-the-default-signs) and [this](#customising-the-winbar)
# Motivation
A message from the author about the motivation for this plugin:
> Many development environments have a built-in debugger. I spend an inordinate
> amount of my time in Vim. I do all my development in Vim and I have even
> customised my workflows for building code, running tests etc.
>
> For many years I have observed myself, friends and colleagues have been
> writing `printf`, `puts`, `print`, etc. debugging statements in all sorts of
> files simply because there is no _easy_ way to run a debugger for _whatever_
> language we happen to be developing in.
>
> I truly believe that interactive, graphical debugging environments are the
> best way to understand and reason about both unfamiliar and familiar code, and
> that the lack of ready, simple access to a debugger is a huge hidden
> productivity hole for many.
>
> Don't get me wrong, I know there are literally millions of developers out
> there that are more than competent at developing without a graphical debugger,
> but I maintain that if they had the ability to _just press a key_ and jump
> into the debugger, it would be faster and more enjoyable that just cerebral
> code comprehension.
>
> I created Vimspector because I find changing tools frustrating. `gdb` for c++,
> `pdb` for python, etc. Each has its own syntax. Each its own lexicon. Each its
> own foibles.
>
> I designed the configuration system in such a way that the configuration can
> be committed to source control so that it _just works_ for any of your
> colleagues, friends, collaborators or complete strangers.
>
> I made remote debugging a first-class feature because that's a primary use
> case for me in my job.
>
> With Vimspector I can _just hit `<F5>`_ in all of the languages I develop in
> and debug locally or remotely using the exact same workflow, mappings and UI.
> I have integrated this with my Vim in such a way that I can hit a button and
> _run the test under the cursor in Vimspector_. This kind of integration has
> massively improved my workflow and productivity. It's even made the process
> of learning a new codebase... fun.
>
> \- Ben Jackson, Creator.
# License
[Apache 2.0](http://www.apache.org/licenses/LICENSE-2.0)
Copyright © 2018 Ben Jackson
# Sponsorship
If you like Vimspector so much that you're wiling to part with your hard-earned cash, please consider donating to one of the following charities, which are meaningful to the author of Vimspector (in order of prefernce):
* [Greyhound Rescue Wales](https://greyhoundrescuewales.co.uk)
* [Cancer Research UK](https://www.cancerresearchuk.org)
* [ICCF Holland](https://iccf.nl)
* Any charity of your choosing.
[ycmd]: https://github.com/Valloric/ycmd
[gitter]: https://gitter.im/vimspector/Lobby?utm_source=share-link&utm_medium=link&utm_campaign=share-link
[java-debug-server]: https://github.com/Microsoft/java-debug
[website]: https://puremourning.github.io/vimspector-web/
[delve]: https://github.com/go-delve/delve
[delve-install]: https://github.com/go-delve/delve/tree/master/Documentation/installation
[vimspector-ref]: https://puremourning.github.io/vimspector/configuration.html
[vimspector-ref-var]: https://puremourning.github.io/vimspector/configuration.html#replacements-and-variables
[vimspector-ref-exception]: https://puremourning.github.io/vimspector/configuration.html#exception-breakpoints
[vimspector-ref-config-selection]: https://puremourning.github.io/vimspector/configuration.html#configuration-selection
[debugpy]: https://github.com/microsoft/debugpy
[YouCompleteMe]: https://github.com/ycm-core/YouCompleteMe#java-semantic-completion
[remote-debugging]: https://puremourning.github.io/vimspector/configuration.html#remote-debugging-support