git-sync

#!/bin/sh
# What: sync several git repos to some common remote
# How: git-sync myremote repo1 path/to/repo2
# Assumption: remotes are configured; remotes do not have uncommitted data;
# remotes are bare (i.e. not necessary to update their working trees)
# Author: Diggory Hardy

if [ "$#" -lt "1" ]; then
    echo "Usage: $0 REMOTE [REPO] [REPO...]"
    exit 1
fi

REMOTE=$1
shift
if [ "$#" -gt "0" ]; then
    REPOS="$@"
else
    echo "Usage: $0 REMOTE [REPO] [REPO...]"
    exit 1
fi

sync(){
    echo "Synching $1 ..." && \
    cd "$1" && \
    if [ "$(git status -uno -s | wc -l)" -gt "0" ]; then
        echo "Warning: uncommitted changes"
        git fetch $REMOTE && \
        git push --all $REMOTE || \
        echo "Sync failure"
    else
        git pull --ff-only $REMOTE $(git branch|cut -d' ' -f2) && \
        git push --all $REMOTE || \
        echo "Sync failure"
    fi
}

CWD="$(pwd)"
for repo in $REPOS; do
    cd "$CWD"
    if [ -d "$repo" ]; then
        sync "$repo"
    else
        echo "Skipping missing repository: $repo"
    fi
done