Better download dir names for URL dependencies.

babel.nim

@@ -323,14 +323,14 @@ proc installFromDir(dir: string, latest: bool, options: TOptions): string =
 
 proc downloadPkg(url: string, verRange: PVersionRange,
                  downMethod: TDownloadMethod): string =
-  let downloadDir = (getTempDir() / "babel" / "url_unknown")
+  let downloadDir = (getTempDir() / "babel" / getDownloadDirName(url, verRange))
   if not existsDir(getTempDir() / "babel"): createDir(getTempDir() / "babel")
   echo("Downloading ", url, " into ", downloadDir, " using ", downMethod, "...")
   doDownload(url, downloadDir, verRange, downMethod)
   result = downloadDir
 
 proc downloadPkg(pkg: TPackage, verRange: PVersionRange): string =
-  let downloadDir = (getTempDir() / "babel" / pkg.name)
+  let downloadDir = (getTempDir() / "babel" / getDownloadDirName(pkg, verRange))
   if not existsDir(getTempDir() / "babel"): createDir(getTempDir() / "babel")
   let downMethod = pkg.downloadMethod.getDownloadMethod()
   echo("Downloading ", pkg.name, " into ", downloadDir, " using ", downMethod, "...")

tools.nim

@@ -2,8 +2,8 @@
 # BSD License. Look at license.txt for more info.
 #
 # Various miscellaneous utility functions reside here.
-import osproc, pegs, strutils, os
+import osproc, pegs, strutils, os, parseurl
-import version, common
+import version, common, packageinfo
 
 # TODO: Merge with common.nim?
 
@@ -46,3 +46,24 @@ proc changeRoot*(origRoot, newRoot, path: string): string =
   else:
     raise newException(EInvalidValue,
       "Cannot change root of path: Path does not begin with original root.")
+
+proc getDownloadDirName*(url: string, verRange: PVersionRange): string =
+  ## Creates a directory name based on the specified ``url``
+  result = ""
+  let purl = parseUrl(url)
+  for i in purl.hostname:
+    case i
+    of strutils.Letters, strutils.Digits:
+      result.add i
+    else: nil
+  result.add "_"
+  for i in purl.path:
+    case i
+    of strutils.Letters, strutils.Digits:
+      result.add i
+    else: nil
+  result.add "_"
+  result.add getSimpleString(verRange)
+
+proc getDownloadDirName*(pkg: TPackage, verRange: PVersionRange): string =
+  result = pkg.name & "_" & verRange.getSimpleString

version.nim

@@ -202,6 +202,19 @@ proc `$`*(verRange: PVersionRange): String =
 
   result.add(string(verRange.ver))
 
+proc getSimpleString*(verRange: PVersionRange): string =
+  ## Gets a string with no special symbols and spaces. Used for dir name creation
+  ## in tools.nim
+  case verRange.kind
+  of verSpecial:
+    result = $verRange.spe
+  of verLater, verEarlier, verEqLater, verEqEarlier, verEq:
+    result = $verRange.ver
+  of verIntersect:
+    result = getSimpleString(verRange.verILeft) & "_" & getSimpleString(verRange.verIRight)
+  of verAny:
+    result = ""
+
 proc newVRAny*(): PVersionRange =
   new(result)
   result.kind = verAny