From a8603605aaaf780aa45edd0f16c8c9588455ccf2 Mon Sep 17 00:00:00 2001
From: Shea Levy <shea@shealevy.com>
Date: Thu, 1 Jan 2015 08:34:56 -0500
Subject: fetchgit: give output a nicer name

Instead of git-export, we get the basename of the repo, plus the
shortrev if the commit-ish is a rev.
---
 pkgs/build-support/fetchgit/default.nix | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

(limited to 'pkgs/build-support/fetchgit/default.nix')

diff --git a/pkgs/build-support/fetchgit/default.nix b/pkgs/build-support/fetchgit/default.nix
index c52a26b7165d..2ba48189833e 100644
--- a/pkgs/build-support/fetchgit/default.nix
+++ b/pkgs/build-support/fetchgit/default.nix
@@ -1,6 +1,20 @@
-{stdenv, git, cacert}:
-{url, rev ? "HEAD", md5 ? "", sha256 ? "", leaveDotGit ? false, fetchSubmodules ? true
-, name ? "git-export"
+{stdenv, git, cacert}: let
+  urlToName = url: rev: let
+    base = baseNameOf url;
+
+    matched = (builtins.match or (x: y:
+      abort "This version of fetchgit requires Nix >= 1.8, please upgrade!"
+    )) "(.*).git" base;
+
+    short = builtins.substring 0 7 rev;
+
+    appendShort = if (builtins.match "[a-f0-9]*" rev) != null
+      then "-${short}"
+      else "";
+  in "${if matched == null then base else builtins.head matched}${appendShort}";
+in {url, rev ? "HEAD", md5 ? "", sha256 ? "", leaveDotGit ? false
+, fetchSubmodules ? true
+, name ? urlToName url rev
 }:
 
 /* NOTE:
-- 
cgit 1.4.1