git-sync

git-sync

#!/usr/bin/env bash

# git-sync: pull, prune, trim all branches.
# requires: (optional) git-trim

set -euo pipefail

CURRENT=$(git branch --show-current)

do-ff() {
        local INPUT_REMOTE="${1}"
        local LOCAL REMOTE UPSTREAM
        git branch --list --format "%(refname:short):%(upstream:remotename):%(upstream:short)" \
        | while IFS=":" read -r LOCAL REMOTE UPSTREAM
        do
                if [ "${LOCAL}" == "${CURRENT}" ]; then
                        continue
                fi
                if [ "${REMOTE}" != "${INPUT_REMOTE}" ]; then
                        continue
                fi
                if [ -z "${UPSTREAM}" ]; then
                        continue
                fi
                if ! git show-ref --quiet "${UPSTREAM}"; then
                        continue
                fi
                if ! git merge-base --is-ancestor "${LOCAL}" "${UPSTREAM}"; then
                        echo "Not possible to fast-forward branch '${LOCAL}' to '${UPSTREAM}'"
                        continue
                fi
                git branch --force "${LOCAL}" "${UPSTREAM}"
        done
}

git fetch --all --prune

for REMOTE in $(git remote); do
        do-ff "${REMOTE}"
done

if [ -n "${CURRENT}" ]; then
        UPSTREAM=$(git branch --list --format "%(upstream:short)" "${CURRENT}")
        if [ -n "${UPSTREAM}" ]; then
                echo "Fast-forward branch '${CURRENT}' to '${UPSTREAM}'"
                git merge --ff-only "${UPSTREAM}" || true
        fi
fi

if which git-trim >/dev/null; then
        echo "git trim"
        git trim --no-update
fi