git-preview: init

2017-09-21 23:36:34 +02:00 · 2017-09-21 23:36:34 +02:00 · 457f2f1345
commit 457f2f1345
parent 0075549f34
1 changed files with 15 additions and 0 deletions
--- a/krebs/5pkgs/simple/git-preview/default.nix
+++ b/krebs/5pkgs/simple/git-preview/default.nix
@ -0,0 +1,15 @@
+{ coreutils, git, stdenv, writeDashBin }:
+
+writeDashBin "git-preview" ''
+  PATH=${stdenv.lib.makeBinPath [
+    coreutils
+    git
+  ]}''${PATH+:$PATH}
+  hashes=$(git log --format=%h "..$1")
+  end=$(echo "$hashes" | head -1)
+  start=$(echo "$hashes" | tail -1)
+  # exit if no diff was found
+  test -z "$start" && exit 0
+  shift
+  git diff "$start^..$end" "$@"
+''