#!/bin/bash
# post-commit hook: create SBo submission archive for added/updated packages
set -u

REPO_ROOT=$(git rev-parse --show-toplevel)
SBO_DIR="$REPO_ROOT/.extras/SBo"

# Find packages whose .SlackBuild was added (A) or modified (M) in this commit.
# git diff-tree output format: <status>\t<file>
# We only want files exactly one directory deep, e.g. hugo/hugo.SlackBuild.
PACKAGES=()
while IFS=$'\t' read -r status file; do
    [[ "$status" != "A" && "$status" != "M" ]] && continue
    dir=$(dirname "$file")
    base=$(basename "$file")
    # Only process packages at SlackBuilds/<pkg> depth
    [[ "$dir" =~ ^SlackBuilds/[^/]+$ ]] || continue
    [[ "$base" == *.SlackBuild ]] || continue
    PACKAGES+=("$dir")
done < <(git diff-tree --no-commit-id -r --name-status HEAD)

[[ ${#PACKAGES[@]} -eq 0 ]] && exit 0

for pkg in "${PACKAGES[@]}"; do
    echo ""
    echo "==> Package: $pkg"
    echo ""
    echo "Files to be archived:"
    echo "---------------------"
    while IFS= read -r f; do
        printf '%s\n' "${f#"$REPO_ROOT/"}"
    done < <(find "$REPO_ROOT/$pkg" -type f | sort)
    echo ""
    printf "Create SBo archive for '%s'? [y/N] " "$pkg"
    read -r answer </dev/tty
    case "$answer" in
        [yY]|[yY][eE][sS])
            mkdir -p "$SBO_DIR"
            if tar -czf "$SBO_DIR/$pkg.tar.gz" -C "$REPO_ROOT" "$pkg"; then
                echo "  -> Archive created: SBo/$pkg.tar.gz"
            else
                echo "  -> Archive FAILED." >&2
            fi
            ;;
        *)
            echo "  -> Skipped."
            ;;
    esac
done

exit 0