Small refactoring.

src/nimblepkg/packageinstaller.nim

@@ -1,9 +1,9 @@
 # Copyright (C) Dominik Picheta. All rights reserved.
 # BSD License. Look at license.txt for more info.
-import os, strutils
+import os, strutils, sets, json
 
 # Local imports
-import cli, common, options
+import cli, common, options, tools
 
 when defined(windows):
   # This is just for Win XP support.
@@ -66,4 +66,41 @@ proc setupBinSymlink*(symlinkDest, symlinkFilename: string,
     writeFile(bashDest, "\"" & symlinkDest & "\" \"$@\"\n")
     result.add bashDest.extractFilename
   else:
-    {.error: "Sorry, your platform is not supported.".}
+    {.error: "Sorry, your platform is not supported.".}
+
+proc saveNimbleMeta*(pkgDestDir, url, vcsRevision: string,
+                    filesInstalled, bins: HashSet[string],
+                    isLink: bool = false) =
+  ## Saves the specified data into a ``nimblemeta.json`` file inside
+  ## ``pkgDestDir``.
+  ##
+  ## filesInstalled - A list of absolute paths to files which have been
+  ##                  installed.
+  ## bins - A list of binary filenames which have been installed for this
+  ##        package.
+  ##
+  ## isLink - Determines whether the installed package is a .nimble-link.
+  var nimblemeta = %{"url": %url}
+  if not vcsRevision.isNil:
+    nimblemeta["vcsRevision"] = %vcsRevision
+  let files = newJArray()
+  nimblemeta["files"] = files
+  for file in filesInstalled:
+    files.add(%changeRoot(pkgDestDir, "", file))
+  let binaries = newJArray()
+  nimblemeta["binaries"] = binaries
+  for bin in bins:
+    binaries.add(%bin)
+  nimblemeta["isLink"] = %isLink
+  writeFile(pkgDestDir / "nimblemeta.json", $nimblemeta)
+
+proc saveNimbleMeta*(pkgDestDir, pkgDir, vcsRevision: string) =
+  ## Overload of saveNimbleMeta for linked (.nimble-link) packages.
+  ##
+  ## pkgDestDir - The directory where the package has been installed.
+  ##              For example: ~/.nimble/pkgs/jester-#head/
+  ##
+  ## pkgDir - The directory where the original package files are.
+  ##          For example: ~/projects/jester/
+  saveNimbleMeta(pkgDestDir, "file://" & pkgDir, vcsRevision,
+                 initSet[string](), initSet[string](), true)