92 lines
2.9 KiB
Nim
92 lines
2.9 KiB
Nim
# Copyright (C) Dominik Picheta. All rights reserved.
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# BSD License. Look at license.txt for more info.
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#
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# Rough rules/philosophy for the messages that Nimble displays are the following:
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# - Green is only shown when the requested operation is successful.
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# - Blue can be used to emphasise certain keywords, for example actions such
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# as "Downloading" or "Reading".
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# - Red is used when the requested operation fails with an error.
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# - Yellow is used for warnings.
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#
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# - Dim for LowPriority.
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# - Bright for HighPriority.
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# - Normal for MediumPriority.
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import logging, terminal, sets, strutils
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type
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CLI* = ref object
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warnings: HashSet[(string, string)]
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Priority* = enum
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HighPriority, MediumPriority, LowPriority
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DisplayType* = enum
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Error, Warning, Message
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const
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longestCategory = len("Downloading")
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foregrounds: array[Error .. Message, ForegroundColor] = [fgRed, fgYellow, fgCyan]
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styles: array[HighPriority .. LowPriority, set[Style]] = [{styleBright}, {}, {styleDim}]
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proc newCLI(): CLI =
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result = CLI(
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warnings: initSet[(string, string)]()
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)
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var globalCLI = newCLI()
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proc calculateCategoryOffset(category: string): int =
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assert category.len <= longestCategory
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return longestCategory - category.len
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proc displayLine(category, line: string, displayType: DisplayType,
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priority: Priority) =
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# Calculate how much the `category` must be offset to align along a center
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# line.
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let offset = calculateCategoryOffset(category)
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# Display the category.
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setForegroundColor(stdout, foregrounds[displayType])
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writeStyled("$1$2 " % [repeatChar(offset), category], styles[priority])
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resetAttributes()
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# Display the message.
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echo(line)
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proc display*(category, msg: string, displayType = Message,
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priority = MediumPriority) =
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# Multiple warnings containing the same messages should not be shown.
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let warningPair = (category, msg)
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if displayType == Warning:
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if warningPair in globalCLI.warnings:
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return
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else:
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globalCLI.warnings.incl(warningPair)
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# Display each line in the message.
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var i = 0
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for line in msg.splitLines():
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if len(line) == 0: continue
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displayLine(if i == 0: category else: "...", line, displayType, priority)
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i.inc
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when isMainModule:
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display("Reading", "config file at /Users/dom/.config/nimble/nimble.ini",
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priority = LowPriority)
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display("Reading", "official package list",
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priority = LowPriority)
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display("Downloading", "daemonize v0.0.2 using Git",
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priority = HighPriority)
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display("Warning", "dashes in package names will be deprecated", Warning,
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priority = HighPriority)
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display("Error", """Unable to read package info for /Users/dom/.nimble/pkgs/nimble-0.7.11
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Reading as ini file failed with:
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Invalid section: .
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Evaluating as NimScript file failed with:
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Users/dom/.nimble/pkgs/nimble-0.7.11/nimble.nimble(3, 23) Error: cannot open 'src/nimblepkg/common'.
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""", Error, HighPriority)
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