Check in a quick git-specific hack for doing mass renames.

Review URL: http://codereview.chromium.org/3440022

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@60323 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 55 insertions, 0 deletions

diff --git a/tools/git/mass-rename.sh b/tools/git/mass-rename.sh
new file mode 100755
index 0000000..9b6cec3
--- /dev/null
+++ b/tools/git/mass-rename.sh
@@ -0,0 +1,55 @@
+#!/bin/bash
+# Copyright (c) 2010 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# mass-rename: update source files (gyp lists, #includes) to reflect
+# a rename.  Expects "git diff --cached -M" to list a bunch of renames.
+#
+# To use:
+#   1) git mv foo1 bar1; git mv foo2 bar2; etc.
+#   2) *without committing*, ./tools/git/mass-rename.sh
+#   3) look at git diff (without --cached) to see what the damage is
+
+# rename:
+# update all uses of |from| (first argument) to |to| (second argument).
+rename() {
+    from="$1"
+    to="$2"
+
+    # Fix references to the files in headers/gyp files.
+    echo "Processing: $from -> $to"
+    git grep -l "$from" -- '*.cc' '*.h' '*.m' '*.mm' '*.gyp*' | \
+        xargs sed -i -e "s|$from|$to|"
+
+    # Fix header guards.
+    if [ "${from##*.}" = "h" ]; then
+        hfrom=$(echo "$from" | tr 'a-z/' 'A-Z_' | sed -e 's|\..*$||')
+        hto=$(echo "$to" | tr 'a-z/' 'A-Z_' | sed -e 's|\..*$||')
+        echo "Processing: $hfrom -> $hto"
+        git grep -l "$hfrom" -- '*.cc' '*.h' '*.m' '*.mm' | \
+            xargs sed -i -e "s|$hfrom|$hto|"
+    fi
+
+    # Try again, stripping the first directory component -- helps with
+    # gyp files that rely on paths from the directory they're in.
+    from=$(echo "$from" | sed -e 's|^[^/]*/||')
+    to=$(echo "$to" | sed -e 's|^[^/]*/||')
+    echo "Processing: $from -> $to"
+    git grep -l "$from" -- '*.cc' '*.h' '*.m' '*.mm' '*.gyp*' | \
+        xargs sed -i -e "s|$from|$to|"
+}
+
+# Make the 'read' used in the while loop split only on tabs/newlines.
+IFS=$'\t\n'
+
+git diff --cached --raw -M | while read attrs from to; do
+    type=$(echo "$attrs" | cut -d' ' -f5)
+    if echo "$type" | grep -q "^R"; then
+        # It's a rename.
+        rename "$from" "$to"
+    else
+        echo "Skipping: $from -- not a rename?"
+    fi
+done
+