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-rwxr-xr-xlib/gitlab/git/support/format-git-cat-file-input21
1 files changed, 21 insertions, 0 deletions
diff --git a/lib/gitlab/git/support/format-git-cat-file-input b/lib/gitlab/git/support/format-git-cat-file-input
new file mode 100755
index 00000000000..2e93c646d0f
--- /dev/null
+++ b/lib/gitlab/git/support/format-git-cat-file-input
@@ -0,0 +1,21 @@
+#!/usr/bin/env ruby
+
+# This script formats the output of the `git diff <old_rev> <new_rev> --raw`
+# command so it can be processed by `git cat-file`
+
+# We need to convert this:
+# ":100644 100644 5f53439... 85bc2f9... R060\tfiles/js/commit.js.coffee\tfiles/js/commit.coffee"
+# To:
+# "85bc2f9 R\tfiles/js/commit.js.coffee\tfiles/js/commit.coffee"
+
+ARGF.each do |line|
+ _, _, old_blob_id, new_blob_id, rest = line.split(/\s/, 5)
+
+ old_blob_id.gsub!(/[^\h]/, '')
+ new_blob_id.gsub!(/[^\h]/, '')
+
+ # We can't pass '0000000...' to `git cat-file` given it will not return info about the deleted file
+ blob_id = new_blob_id =~ /\A0+\z/ ? old_blob_id : new_blob_id
+
+ $stdout.puts "#{blob_id} #{rest}"
+end