git-unzip-all/git-config-pre-commit at master · org-lduran2/git-unzip-all · GitHub

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#!/usr/bin/env bash
# Canonical : https://github.com/lduran2/git-unzip-all/git-config-pre-commit
# Configure the pre-commit hook to run hooks/unzip-all.
# By        : Leomar Duran <https://github.com/lduran2>
# When      : 2022-02-01t09:15R
# Version   : 1.3.2
#
# CHANGELOG :
#   v1.3.2 - 2022-02-01t09:15R
#       cleaned up logs, `HOOK_TO_SKIP`
#
#   v1.3.1 - 2022-02-01t09:03R
#       logging for pre-commit templating
#
#   v1.3.0 - 2022-02-01t08:52R
#       single file for pre-commit template
#       variable template
#
#   v1.2.3 - 2022-02-01t07:32R
#       checking for hook file before assembly
#
#   v1.2.2 - 2022-02-01t06:30R
#       staging pattern file
#
#   v1.2.1 - 2022-02-01t06:02R
#       fixed `$SCRIPT_ROOT.` -> `$SOURCE_DIR`
#
#   v1.2.0 - 2022-02-01t05:11R
#       use `dirname` to hangle resource locality
#
#   v1.1.4 - 2022-01-25t22:42R
#       add variable references in strings
#
#   v1.1.3 - 2022-01-25t22:32R
#       added `SCRIPT_ROOT` for files rel to script
#
#   v1.1.2 - 2022-01-25t22:24R
#       fixed the unformated strings for the life cycle messages
#
#   v1.1.1 - 2022-01-25t22:16R
#       fixed the template strings for the config filenames
#
#   v1.1.0 - 2022-01-25t22:02R
#       sets up the pattern file
#       reconfigured for submodule
#
#   v1.0.0 - 2022-01-25t19:39R
#       composes the hook file for pre-commit
#

# working directories
declare -r SOURCE_DIR=$(dirname $0)
declare -r ROOT_DIR="$SOURCE_DIR/../.."
declare -r TEMPLATE_DIR="$SOURCE_DIR/templates"

# hook file to which to attach `./main`
declare -r HOOK_FILE="$ROOT_DIR/.git/hooks/pre-commit"
# contains the patterns of files to unzip (relative to root)
declare -r ROOT_TO_PATTERN_FILE=".unzip"
# the unzip pattern file resolved to this script
declare -r PATTERN_FILE="$ROOT_DIR/$ROOT_TO_PATTERN_FILE"

# line in the template to which to skip (if the hook file exists)
declare -r HOOK_TO_SKIP=2
# find this directory relative to the repo root
declare -r ROOT_TO_SOURCE=$(realpath --relative-to=$ROOT_DIR $SOURCE_DIR)

# check if the hook file exists before starting assembling
# [] returns 0 if the file exists, 1 otherwise
[ -f "$HOOK_FILE" ] ; should_create_hook=$?

# read from the template
cat "$TEMPLATE_DIR/pre-commit" |
    # if the hook file does not exist
    if [ $should_create_hook -ne 0 ] ; then
         >&2 echo 'Creating the pre-commit hook file . . .'
        # just forward the file as is
        cat
    else # to [ $should_create_hook -ne 0 ]
         >&2 echo 'Appending `unzip-all` to the pre-commit hook file . . .'
        # otherwise, newline and skip the script shebang
        echo ''
        tail "-n+$HOOK_TO_SKIP"
    fi | # [ $should_create_hook -ne 0 ]
        # replace the template source path
        sed -e "s:\\\$ROOT_TO_SOURCE:$ROOT_TO_SOURCE:g" >> "$HOOK_FILE"
# end cat "$TEMPLATE_DIR/pre-commit"

# if the pattern file does not exist
if [[ ! -f "$PATTERN_FILE" ]] ; then
    >&2 echo "Creating the pattern file \`/$ROOT_TO_PATTERN_FILE\` . . ."
    # copy it from the template
    cat "$TEMPLATE_DIR/$ROOT_TO_PATTERN_FILE" > "$PATTERN_FILE"
fi # [[ ! -f "$PATTERN_FILE" ]]

>&2 echo "Staging the pattern file \`/$ROOT_TO_PATTERN_FILE\` . . ."
# either way, stage the pattern file
git add "$PATTERN_FILE"

# confirm finished
>&2 echo 'Done.'