The Git Gatling Gun: Perform operations on multiple side-by-side git repositories.

git-gat

#!/bin/bash

# Git Gat: The Git Gatling Gun!
# Perform operations machine-gun style on side-by-side git repositories.
#
# Save this somewhere on your path as git-gat (or whatever you want to call it).
# Usage:
#
# git gat status
# git gat -f status # Perform operation even if the repo is dirty.
# git gat tag v1.0.2
# etc.
#
# Be careful when performing batch operations on multiple git repos.

# Check whether there are uncommitted changes in
# any of the repositories.

# These are commands that are safe to run even if a repo is dirty.
SAFELIST=( rev-parse status );

FORCE=false
if [[ $1 =~ ^-[fF]$ ]]; then
  FORCE=true;
  shift;
fi;

if [[ $FORCE = false ]]; then
  for ITEM in "${SAFELIST[@]}"; do
    if [[ $1 = $ITEM ]]; then
      FORCE=true;
      break;
    fi;
  done;
fi;

if [[ $FORCE = false ]]; then
  for REPO in *; do
    if [[ -d $REPO ]]; then
      cd "$REPO";
      # Is this a git repo?
      git rev-parse --git-dir > /dev/null 2>&1;
      if [[ $? -eq 0 ]]; then
        if [ \! -z "$(git status --porcelain)" ]; then
          read -p "You have uncommitted changes in the $REPO repository. Are you sure you want to proceed? [y/n] " -n 1 -r
          echo;
          if ! [[ $REPLY =~ ^[Yy]$ ]]; then
            exit 1;
          fi;
        fi;
      fi;
      cd ..;
    fi;
  done;
fi;

# Perform the actual git operation in each repo.

for REPO in *; do
  if [[ -d $REPO ]]; then
    cd "$REPO";
    git rev-parse --git-dir > /dev/null 2>&1;
    if [ $? -eq 0 ]; then
      if [[ $1 != only ]]; then
        echo "$REPO:"; # The only command handles this itself.
      fi;
      git "$@";
      if [[ $1 != only ]]; then
        echo;
      fi;
    fi;
    cd ..;
  fi;
done;