Add a test case for nimble develop --global

Related to #948

src/nimble.nim

@@ -1151,7 +1151,7 @@ proc saveLinkFile(pkgInfo: PackageInfo, options: Options) =
 
   pkgLinkDir.createDir
   writeFile(pkgLinkFilePath, pkgLinkFileContent)
-  displaySuccess(&"Package link file saved to \"{pkgLinkFilePath}\".")
+  displaySuccess(pkgLinkFileSavedMsg(pkgLinkFilePath))
 
 proc developFromDir(pkgInfo: PackageInfo, options: var Options) =
   assert options.action.typ == actionDevelop,

src/nimblepkg/displaymessages.nim

@@ -157,3 +157,6 @@ proc pkgAlreadyExistsInTheCacheMsg*(pkgInfo: PackageInfo): string =
 proc skipDownloadingInAlreadyExistingDirectoryMsg*(dir, name: string): string =
   &"The download directory \"{dir}\" already exists.\n" &
   &"Skipping the download of \"{name}\"."
+
+proc pkgLinkFileSavedMsg*(path: string): string =
+  &"Package link file \"{path}\" is saved."

tests/tdevelopfeature.nim

@@ -6,7 +6,7 @@
 import unittest, os, strutils, strformat, json, sets
 import testscommon, nimblepkg/displaymessages, nimblepkg/paths
 
-from nimblepkg/common import cd
+from nimblepkg/common import cd, getLinkFileName, getLinkFileDir
 from nimblepkg/developfile import developFileName, pkgFoundMoreThanOnceMsg
 from nimblepkg/version import newVersion, parseVersionRange
 from nimblepkg/nimbledatafile import nimbleDataFileName, NimbleDataJsonKeys
@@ -81,6 +81,26 @@ suite "develop feature":
         check lines.inLinesOrdered(pkgSetupInDevModeMsg(
           pkgBName, installDir / pkgBName))
 
+  test "can develop global":
+    cdCleanDir installDir:
+      usePackageListFile &"../develop/{pkgListFileName}":
+        let (output, exitCode) = execNimble("develop", "--global", pkgAName)
+        check exitCode == QuitSuccess
+        var lines = output.processOutput
+        let linkFilePath = installDir / "links" / pkgAName.getLinkFileDir /
+                           pkgAName.getLinkFileName
+        check lines.inLinesOrdered(pkgLinkFileSavedMsg(linkFilePath))
+        check lines.inLinesOrdered(pkgSetupInDevModeMsg(
+          pkgAName, installDir / pkgAName))
+        check linkFilePath.fileExists
+        let linkFileLines = linkFilePath.readFile.split('\n')
+        let lowerCasePkgAName = pkgAName.toLower
+        let expectedLinkPath = installDir / lowerCasePkgAName
+        let expectedLinkNimbleFilePath =
+          expectedLinkPath / lowerCasePkgAName & ".babel"
+        check linkFileLines[0] == expectedLinkNimbleFilePath
+        check linkFileLines[1] == expectedLinkPath
+
   test "cannot remove package with develop reverse dependency":
     cdCleanDir installDir:
       usePackageListFile &"../develop/{pkgListFileName}":