Bash script for checking local repositories for unpushed changes

check_repos_for_unpushed_changes.sh

#!/usr/bin/env bash
# 
# Check the status of a folder of repos to see if there are any unpushed commits.
#
# This is intended to help migrate to a new laptop, where you want to check
# that there are no unpushed local commits before switching to the new machine.
# 
# Needs `rg` and `fd` installed.

set -e

function check_all_repos {
    local base_dir="$1"
    repo_folders "$base_dir" | while read -r repo; do
        folder_name="$(basename "$repo")"
        echo "Checking repo '$folder_name'..."
        cd "$repo" || exit 1
        check_repo
    done
}

# Return the full paths to repos to examine.
function repo_folders {
    fd -t d -d 1 . "$1" 
}

# Check the status of the repo.
function check_repo {
    # Update local index.
    #git fetch 2> /dev/null

    # Loop over local branches and check if they are in sync.
    branches_to_check | while read -r branch; do
        tracking_branch=$(remote_tracking_branch "$branch")
        if [ -z "$tracking_branch" ]; then
            echo "  No tracking branch for '$branch'" >&2
        else
            if is_out_of_sync "$branch" "$tracking_branch"; then
                echo "  Branch '$branch' is out of sync" >&2
            fi
        fi
    done
}

# Return the branches to check.
function branches_to_check {
    # All branches except mainlines.
    git branch --format='%(refname:short)' | rg -v "^(master|main|production)$"
}

# Print the name of the remote tracking branch (or an empty string).
function remote_tracking_branch {
    if name=$(git rev-parse --abbrev-ref "$1@{upstream}" 2>/dev/null)
    then
        echo "$name"
    else
        echo ""
    fi
}

# Test if the two branches are out of sync with each other.
function is_out_of_sync {
    local local_branch="$1"
    local tracking_branch="$2"
    ahead=$(git rev-list --count "$local_branch...$tracking_branch")
    behind=$(git rev-list --count "$tracking_branch...$local_branch")
    [ "$ahead" -ne 0 ] || [ "$behind" -ne 0 ]
}

# Pass in the parent folder where the repos live.
check_all_repos "$HOME/Workspace/octo/"