2 files changed, 18 insertions, 1 deletions

diff --git a/src/luarocks/fetch.lua b/src/luarocks/fetch.lua
index bdb448c7..b835b20e 100644
--- a/src/luarocks/fetch.lua
+++ b/src/luarocks/fetch.lua
@@ -302,7 +302,7 @@ function fetch_sources(rockspec, extract, dest_dir)
    if protocol == "http" or protocol == "https" or protocol == "ftp" or protocol == "file" then
       proto = require("luarocks.fetch")
    else
-      ok, proto = pcall(require, "luarocks.fetch."..protocol)
+      ok, proto = pcall(require, "luarocks.fetch."..protocol:gsub("[+-]", "_"))
       if not ok then
          return nil, "Unknown protocol "..protocol
       end
diff --git a/src/luarocks/fetch/git_file.lua b/src/luarocks/fetch/git_file.lua
new file mode 100644
index 00000000..1b18d0fa
--- /dev/null
+++ b/src/luarocks/fetch/git_file.lua
@@ -0,0 +1,17 @@
+
+--- Fetch back-end for retrieving sources from local Git repositories.
+module("luarocks.fetch.git_file", package.seeall)
+
+local git = require("luarocks.fetch.git")
+
+--- Fetch sources for building a rock from a local Git repository.
+-- @param rockspec table: The rockspec table
+-- @param extract boolean: Unused in this module (required for API purposes.)
+-- @param dest_dir string or nil: If set, will extract to the given directory.
+-- @return (string, string) or (nil, string): The absolute pathname of
+-- the fetched source tarball and the temporary directory created to
+-- store it; or nil and an error message.
+function get_sources(rockspec, extract, dest_dir)
+   rockspec.source.url = rockspec.source.url:gsub("^git.file://", "")
+   return git.get_sources(rockspec, extract, dest_dir)
+end