Implements basic support for building with .nimble-link'ed packages.

src/nimblepkg/common.nim

@@ -18,6 +18,7 @@ when not defined(nimscript):
       isNimScript*: bool ## Determines if this pkg info was read from a nims file
       isMinimal*: bool
       isInstalled*: bool ## Determines if the pkg this info belongs to is installed
+      isLinked*: bool ## Determines if the pkg this info belongs to has been linked via `develop`
       postHooks*: HashSet[string] ## Useful to know so that Nimble doesn't execHook unnecessarily
       preHooks*: HashSet[string]
       name*: string

src/nimblepkg/packageinfo.nim

@@ -66,7 +66,7 @@ proc getNameVersion*(pkgpath: string): tuple[name, version: string] =
   ##
   ## Also works for file paths like:
   ##   ``/home/user/.nimble/pkgs/package-0.1/package.nimble``
-  if pkgPath.splitFile.ext == ".nimble" or pkgPath.splitFile.ext == ".babel":
+  if pkgPath.splitFile.ext in [".nimble", ".nimble-link", ".babel"]:
     return getNameVersion(pkgPath.splitPath.head)
 
   result.name = ""
@@ -281,7 +281,7 @@ proc findNimbleFile*(dir: string; error: bool): string =
     if kind in {pcFile, pcLinkToFile}:
       let ext = path.splitFile.ext
       case ext
-      of ".babel", ".nimble":
+      of ".babel", ".nimble", ".nimble-link":
         result = path
         inc hits
       else: discard
@@ -293,8 +293,16 @@ proc findNimbleFile*(dir: string; error: bool): string =
       raise newException(NimbleError,
           "Specified directory does not contain a .nimble file.")
     else:
-      display("Warning:", "No .nimble file found for " & dir, Warning,
-              HighPriority)
+      display("Warning:", "No .nimble or .nimble-link file found for " &
+              dir, Warning, HighPriority)
+
+  if result.splitFile.ext == ".nimble-link":
+    # Return the path of the real .nimble file.
+    let lines = readFile(result).splitLines()
+    result = lines[0]
+    if not fileExists(result):
+      raiseNimbleError("The .nimble-link file is pointing to a missing" &
+                       " file: " & result)
 
 proc getInstalledPkgsMin*(libsDir: string, options: Options):
         seq[tuple[pkginfo: PackageInfo, meta: MetaData]] =
@@ -309,13 +317,15 @@ proc getInstalledPkgsMin*(libsDir: string, options: Options):
       let nimbleFile = findNimbleFile(path, false)
       if nimbleFile != "":
         let meta = readMetaData(path)
-        let (name, version) = getNameVersion(nimbleFile)
+        let (name, version) = getNameVersion(path)
         var pkg = initPackageInfo(nimbleFile)
         pkg.name = name
         pkg.version = version
         pkg.specialVersion = version
         pkg.isMinimal = true
         pkg.isInstalled = true
+        pkg.isLinked =
+          cmpPaths(nimbleFile.splitFile().dir, path) != 0
         result.add((pkg, meta))
 
 proc withinRange*(pkgInfo: PackageInfo, verRange: VersionRange): bool =
@@ -369,7 +379,7 @@ proc findAllPkgs*(pkglist: seq[tuple[pkgInfo: PackageInfo, meta: MetaData]],
 
 proc getRealDir*(pkgInfo: PackageInfo): string =
   ## Returns the directory containing the package source files.
-  if pkgInfo.srcDir != "" and not pkgInfo.isInstalled:
+  if pkgInfo.srcDir != "" and (not pkgInfo.isInstalled or pkgInfo.isLinked):
     result = pkgInfo.mypath.splitFile.dir / pkgInfo.srcDir
   else:
     result = pkgInfo.mypath.splitFile.dir
@@ -515,6 +525,8 @@ when isMainModule:
       ("package", "#head")
   doAssert getNameVersion("/home/user/.nimble/libs/package-#branch-with-dashes") ==
       ("package", "#branch-with-dashes")
+  # readPackageInfo (and possibly more) depends on this not raising.
+  doAssert getNameVersion("/home/user/.nimble/libs/package") == ("package", "")
 
   doAssert toValidPackageName("foo__bar") == "foo_bar"
   doAssert toValidPackageName("jhbasdh!£$@%#^_&*_()qwe") == "jhbasdh_qwe"

src/nimblepkg/packageparser.nim

@@ -292,6 +292,11 @@ proc readPackageInfo(nf: NimbleFile, options: Options,
       result.version = minimalInfo.version
       result.isNimScript = true
       result.isMinimal = true
+
+      # It's possible this proc will receive a .nimble-link file eventually,
+      # I added this assert to hopefully make this error clear for everyone.
+      let msg = "No version detected. Received nimble-link?"
+      assert result.version.len > 0, msg
     else:
       try:
         readPackageInfoFromNims(nf, options, result)
@@ -386,6 +391,8 @@ proc getInstalledPkgs*(libsDir: string, options: Options):
           raise exc
 
         pkg.isInstalled = true
+        pkg.isLinked =
+          cmpPaths(nimbleFile.splitFile().dir, path) != 0
         result.add((pkg, meta))
 
 proc isNimScript*(nf: string, options: Options): bool =
@@ -393,7 +400,9 @@ proc isNimScript*(nf: string, options: Options): bool =
 
 proc toFullInfo*(pkg: PackageInfo, options: Options): PackageInfo =
   if pkg.isMinimal:
-    return getPkgInfoFromFile(pkg.mypath, options)
+    result = getPkgInfoFromFile(pkg.mypath, options)
+    result.isInstalled = pkg.isInstalled
+    result.isLinked = pkg.isLinked
   else:
     return pkg