TOOLS: auto-commit.sh - Add script to group modified files by last commit and...

#!/usr/bin/env bash

set -euo pipefail

#######################################

# Globals

#######################################

declare -A commitmsg_to_files

declare -A commitmsg_to_date

declare -A file_status

MAX_FILES=0   # 0 = nessun limite

#######################################

# Logging

#######################################

log_info() { echo "$*"; }

log_warn() { echo "[WARN] $*" >&2; }

log_error() { echo "[ERROR] $*" >&2; }

usage() {

    cat <<EOF

Usage: $0 [-n NUM]

Options:

  -n NUM   Limit the number of analyzed files (0 = no limit)

  -h       Show this help

EOF

}

#######################################

# Git helpers

#######################################

get_modified_files() {

    git status --porcelain | while IFS= read -r line; do

        # primi 2 caratteri = status, poi spazio, poi filename

        status="${line:0:2}"

        file="${line:3}"

        echo "$status|$file"

    done

}

get_commits_for_file() {

    local file="$1"

    git log --follow --pretty=format:'%H|%ct|%s' -- "$file" | awk '!seen[$0]++'

}

#######################################

# Process a single file (include commit classification)

#######################################

process_file() {

    local status="$1"

    local file="$2"

    log_info "Analyse file: $file (status: $status)"

    file_status["$file"]="$status"

    # --- commit analysis inline ---

    mapfile -t commits < <(get_commits_for_file "$file")

    local count="${#commits[@]}"

    local commit_msg

    local commit_ts

    log_info "  Commits found: $count"

    if (( count == 0 )); then

        commit_msg="NO_COMMITS"

        commit_ts=0

        log_warn "  No commits found → classified as NO_COMMITS"

    elif (( count == 1 || count == 2 )); then

        selected="${commits[0]}"

        commit_ts="$(cut -d'|' -f2 <<< "$selected")"

        commit_msg="$(cut -d'|' -f3- <<< "$selected")"

    else

        selected="${commits[0]}"

        commit_ts="$(cut -d'|' -f2 <<< "$selected")"

        commit_msg="MULTIPLE_COMMITS"

        log_warn "  >2 commits → classified as MULTIPLE_COMMITS"

    fi

    # popula commitmsg_to_date se necessario

    if [[ -z "${commitmsg_to_date[$commit_msg]:-}" ]]; then

        commitmsg_to_date["$commit_msg"]="$commit_ts"

    fi

    commitmsg_to_files["$commit_msg"]+="$file"$'\n'

}

#######################################

# Output

#######################################

print_results() {

    log_info "Generate final output..."

    # ordinamento per timestamp

    mapfile -t ordered_msgs < <(

        for msg in "${!commitmsg_to_date[@]}"; do

            echo "${commitmsg_to_date[$msg]}|$msg"

        done | sort -nr | cut -d'|' -f2-

    )

    for msg in "${ordered_msgs[@]}"; do

        log_info "----------------------------------------"

        log_info ""

        log_info "Commit group: $msg"

        log_info "Files:"

        while IFS= read -r file; do

            [[ -z "$file" ]] && continue

            log_info "  $file"

        done <<< "${commitmsg_to_files[$msg]}"

        add_files=()

        rm_files=()

        while IFS= read -r file; do

            [[ -z "$file" ]] && continue

            status="${file_status[$file]}"

            if [[ "${status:0:1}" == "D" || "${status:1:1}" == "D" ]]; then

                rm_files+=("$file")

            else

                add_files+=("$file")

            fi

        done <<< "${commitmsg_to_files[$msg]}"

        if (( ${#add_files[@]} )); then

            log_info "  git add ${add_files[*]}"

        fi

        if (( ${#rm_files[@]} )); then

            log_info "  git rm ${rm_files[*]}"

        fi

        log_info "  git commit -m \"$msg (fixup)\""

    done

}

#######################################

# Main

#######################################

main() {

    while getopts ":n:h" opt; do

        case "$opt" in

            n)

                MAX_FILES="$OPTARG"

                [[ "$MAX_FILES" =~ ^[0-9]+$ ]] || {

                    log_error "-n requires a numeric argument"

                    exit 1

                }

                ;;

            h)

                usage

                exit 0

                ;;

            *)

                usage

                exit 1

                ;;

        esac

    done

    log_info "Detection of modified files..."

    mapfile -t entries < <(get_modified_files)

    if (( MAX_FILES > 0 && ${#entries[@]} > MAX_FILES )); then

        entries=( "${entries[@]:0:MAX_FILES}" )

        log_info "Limiting analysis to first $MAX_FILES files"

    fi

    log_info "Analysing ${#entries[@]} files"

    for entry in "${entries[@]}"; do

        status="${entry%%|*}"

        file="${entry#*|}"

        process_file "$status" "$file"

    done

    print_results

    log_info "Completed."

}

main "$@"