Use csources_v2 when applicable (#9)

Based on dom96#317

---------

Co-authored-by: ringabout <[email protected]>

Author: ire4ever1190

src/choosenimpkg/builder.nim

@@ -30,7 +30,7 @@ proc buildCompiler(version: Version, params: CliParams) =
     display("Warning:", "Building from latest C sources. They may not be " &
                         "compatible with the Nim version you have chosen to " &
                         "install.", Warning, HighPriority)
-    let path = downloadCSources(params)
+    let path = downloadCSources(version, params)
     let extractDir = getCurrentDir() / "csources"
     extract(path, extractDir)
 

src/choosenimpkg/download.nim

@@ -313,11 +313,19 @@ proc download*(version: Version, params: CliParams): string =
     raise newException(ChooseNimError, "Version $1 does not exist." %
                        $version)
 
-proc downloadCSources*(params: CliParams): string =
+template useCSourcesV2(version: Version): bool =
+  $version in ["#head", "#devel", "#version-2-0"] or version >= parseVersion("2.0.0")
+
+proc downloadCSources*(version: Version, params: CliParams): string =
+  let csourcesAdaptedUrl =
+    if useCSourcesV2(version):
+      csourcesUrl & "_v2"
+    else:
+      csourcesUrl
   let
-    commit = getLatestCommit(csourcesUrl, "master")
+    commit = getLatestCommit(csourcesAdaptedUrl, "master")
     archive = if commit.len != 0: commit else: "master"
-    csourcesArchiveUrl = $(parseUri(csourcesUrl) / (dlArchive % archive))
+    csourcesArchiveUrl = $(parseUri(csourcesAdaptedUrl) / (dlArchive % archive))
 
   var outputPath: string
   if not needsDownload(params, csourcesArchiveUrl, outputPath):