full.js

'use strict';
const gulp = require('gulp');
const filter = require('gulp-filter');
const combiner = require('stream-combiner2').obj;
const gilp = require('gilp')(gulp);
const print = require('gulp-print');

const eslint = require('gulp-eslint');
const flake8 = require('gulp-flake8');
const mergeConflict = require('gilp-merge-conflict');
const checkCommit = require('gilp-check-commit');
const checkBranchName = require('gilp-check-branch-name');
const checkGrep = require('gulp-check-grep');
const filenameHint = require('gulp-filename-hint');

function js () {
  const src = filter([
    'app/**/*.js',
    'app/node_modules/**',
    '!app/**/vendor/**',
    '!app/assets/**'
  ], { restore: true });
  return combiner(
    src,
    print(),
    filenameHint({ regExp: /(^|\/)[a-z0-9.-]+\.js$/ }),
    eslint(),
    eslint.format(),
    eslint.failAfterError(),
    checkGrep(/console\.log(.(?!noqa$))+$/gm, { message: 'console.log' }),
    checkGrep(/debugger$(.(?!noqa$))+$/gm, { message: 'debugger' }),
    checkGrep.failOnError(),
    src.restore
  );
}

function py () {
  const src = filter(['app/**/*.py'], { restore: true });
  return combiner(
    src,
    print(),
    filenameHint({ regExp: /(^|\/)[a-z_0-9]+\.py$/ }),
    flake8('.flake8'),
    flake8.failOnError(),
    checkGrep(/datetime\.now\(\)/g, { message: 'Replace datetime.now by timezone.now' }),
    checkGrep(/gettext/g, { message: 'Remove i18n' }),
    checkGrep(/print\((.(?!noqa$))+$/gm, { message: 'print call' }),
    checkGrep.failOnError(),
    src.restore
  );
}

function html () {
  const src = filter(['app/**/*.html'], { restore: true });
  return combiner(
    src,
    print(),
    filenameHint({ regExp: /(^|\/)[a-z0-9-]+\.html$/ }),
    checkGrep(/{%\s+load\s+i18n\s+%\}/g, { message: 'Remove i18n' }),
    checkGrep(/\{%\s+trans\s+[^%]+/g, { message: 'Remove trans tags' }),
    checkGrep(/\{%\s+block\s+[a-z0-9_]*[A-Z-]+[a-z0-9_]*/g, { message: 'Use snake_case for block tags' }),
    checkGrep.failOnError(),
    src.restore
  );
}

gilp.hook('pre-commit', function () {
  return gilp.srcFromStaged(['./app/**/*'])
    .pipe(js())
    .pipe(py())
    .pipe(html())
    .pipe(checkBranchName({
      allow: [/^(dev-([0-9]+|NA)-[a-z0-9_]+)$/, 'hotfix'],
      disallow: [/^dev$/, '^master$']
    }))
    .pipe(mergeConflict())
    .pipe(mergeConflict.failOnError());
});

gilp.hook('commit-msg', function () {
  return gilp.srcFromStaged(['**/*'])
    .pipe(checkCommit(/^(NA|[0-9]+):\s[A-Z0-9].*\.$/gm, 'Invalid commit message format: Example > 4566: First letter in uppercase and end with a period.\n'
    ));
});