[FYI PATCH] Added a git search and replace command

[FYI PATCH] Added a git search and replace command

[Sverre Rabbelier]

A simple script that uses 'git ls-files' and xargs to
search and replace all the specified files.
---

Not meant for inclusion, just a simple script I wrote up
when I wanted to change a function name in my repository
but didn't want to figure out which magic argument to find
does what I want. Another advantage of using git ls-files
is that it will prevent that any unrevertable changes will
be made (since the script checks if the tree is dirty or
not). I'm sure there's plenty of room for improvement here,
it's probably not portable at all either, so comments are
welcome :).

 .gitignore |    1 +
 Makefile   |    1 +
 git-sar.sh |   61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 63 insertions(+), 0 deletions(-)
 create mode 100755 git-sar.sh

diff --git a/.gitignore b/.gitignore
index a213e8e..451cb93 100644
--- a/.gitignore
+++ b/.gitignore
@@ -108,6 +108,7 @@ git-rev-list
 git-rev-parse
 git-revert
 git-rm
+git-sar
 git-send-email
 git-send-pack
 git-sh-setup
diff --git a/Makefile b/Makefile
index b01cf1c..979e9ea 100644
--- a/Makefile
+++ b/Makefile
@@ -252,6 +252,7 @@ SCRIPT_SH += git-sh-setup.sh
 SCRIPT_SH += git-stash.sh
 SCRIPT_SH += git-submodule.sh
 SCRIPT_SH += git-web--browse.sh
+SCRIPT_SH += git-sar.sh
 
 SCRIPT_PERL += git-add--interactive.perl
 SCRIPT_PERL += git-archimport.perl
diff --git a/git-sar.sh b/git-sar.sh
new file mode 100755
index 0000000..db6317b
--- /dev/null
+++ b/git-sar.sh
@@ -0,0 +1,61 @@
+#!/bin/bash
+
+do_sed () {
+  sed "$2" $3 > $3.replaced
+  mv $3.replaced $3
+}
+
+do_git_find() {
+  # Sanity check
+  if is_dirty_tree
+  then
+    echo "Refusing to work on a dirty tree"
+  fi
+
+  files=`git ls-files "$1"`
+  if test -z "$files"
+  then
+    echo "Your pathspec did not match any files."
+    exit 1
+  fi
+  echo "$files" | xargs -n 1 git-sar --replace $2
+}
+
+is_dirty_tree () {
+  `git diff --quiet`
+  test $? -ne 0
+}
+
+do_show_usage() {
+  echo "usage: git-sar pathspec sed"
+  exit 128
+}
+
+do_main() {
+  # Verify argument size
+  if test "$#" -le 1 -o "$#" -ge 4
+  then
+    do_show_usage
+  fi
+
+  # Two argument form
+  if test "$#" -eq 2
+  then
+    do_git_find "$@"
+  fi
+
+  # Three argument form, we're calling ourselves through sed
+  if test "$#" -eq 3
+  then
+    # Double check if the user typoed or if we are indeed meta-calling
+    if test "$1" != "--replace"
+    then
+      do_show_usage
+    fi
+
+    do_sed "$@"
+  fi
+}
+
+do_main "$@"
+
-- 
1.5.6.4.570.g052e.dirty