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install.js
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install.js
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'use strict';
var fs = require('fs');
var path = require('path');
var os = require('os');
var exists = fs.existsSync || path.existsSync;
var PREFIX = 'commit-msg:';
console.log(PREFIX + ' ' + __dirname);
if (~__dirname.indexOf('/lib/node_modules')) {
console.log(PREFIX + " Could not be install global");
return 0;
}
var root = path.resolve(__dirname, '..', '..');
var packageJson = path.resolve(root, 'package.json');
var packageJsonContent = '';
try {
console.log(PREFIX);
console.log(PREFIX + ' Try to read package.json');
console.log(PREFIX);
packageJsonContent = fs.readFileSync(packageJson);
if (packageJsonContent) {
packageJsonContent = JSON.parse(packageJsonContent);
}
console.log(PREFIX);
console.log(PREFIX + ' Successfully read package.json');
console.log(PREFIX);
} catch (e) {
console.error(PREFIX);
console.error(PREFIX + ' Failed to read package.json file');
console.error(PREFIX + ' ' + e.message);
console.error(PREFIX);
}
var git = getGitFolderPath(root);
var hooks = path.resolve(git, 'hooks');
var commitMsg = path.resolve(hooks, 'commit-msg');
var regex = '(([a-z]+-[0-9]+:|merge).{6,})';
var errorMsg = 'Your commit message must match the pattern <task_namespace>-<#task>: <text>’, or to be a merge message';
if (packageJsonContent && packageJsonContent['commit-msg']) {
var commitMsgObj = packageJsonContent['commit-msg'];
if (commitMsgObj['regex']) {
regex = commitMsgObj['regex'];
}
if (commitMsgObj['error-message']) {
errorMsg = commitMsgObj['error-message'];
}
}
/**
* Bail out if we don't have an `.git` directory as the hooks will not get
* triggered. If we do have directory create a hooks folder if it doesn't exist.
*/
if (!git) {
console.log(PREFIX);
console.log(PREFIX + 'Not found any .git folder for installing commit-msg hook');
console.log(PREFIX);
return;
}
/**
* Resolve git directory for submodules
*/
if (exists(git) && fs.lstatSync(git).isFile()) {
var gitinfo = fs.readFileSync(git).toString();
var gitdirmatch = /gitdir: (.+)/.exec(gitinfo);
var gitdir = gitdirmatch.length === 2 ? gitdirmatch[1] : null;
if (gitdir !== null) {
git = path.resolve(root, gitdir);
hooks = path.resolve(git, 'hooks');
commitMsg = path.resolve(hooks, 'commit-msg');
}
}
if (!exists(hooks)) fs.mkdirSync(hooks);
/**
* If there's an existing `commit-msg` hook we want to back it up instead of
* overriding it and losing it completely as it might contain something
* important.
*/
if (exists(commitMsg) && !fs.lstatSync(commitMsg).isSymbolicLink()) {
console.log(PREFIX);
console.log(PREFIX + ' Detected an existing git commit-msg hook');
fs.writeFileSync(commitMsg + '.old', fs.readFileSync(commitMsg));
console.log(PREFIX + ' Old commit-msg hook backuped to commit-msg.old');
console.log(PREFIX);
}
/**
* We cannot create a symlink over an existing file so make sure it's gone and
* finish the installation process.
*/
try {
fs.unlinkSync(commitMsg);
}
catch (e) {
}
/**
* Dynamically create commit-msg hook file (os.EOL for cross-OS)
*/
var commitMsgContent = [
'#!/usr/bin/env bash',
'BRANCH=`git rev-parse --abbrev-ref HEAD`',
'if [[ "$BRANCH" == "master" || "$BRANCH" == "develop" ]]; then',
' echo "You are on branch $BRANCH. Are you sure you want to commit to this branch?"',
' echo "If so, commit with -n to skip this hook."',
' exit 1',
'fi',
'if [[ "$BRANCH" = "hotfix/"* ]]; then',
' echo "It\'s hotfix branch. Skip validation"',
' exit 0',
'fi',
'commit_regex=\'' + regex + '\'',
'error_msg="' + errorMsg + '"',
'if ! grep -iqE "$commit_regex" "$1"; then',
' echo "$error_msg" >&2',
' exit 1',
'fi'
].join(os.EOL) + os.EOL;
/**
* It could be that we do not have rights to this folder which could cause the
* installation of this module to completely fail. We should just output the
* error instead destroying the whole npm install process.
*/
try {
fs.writeFileSync(commitMsg, commitMsgContent);
}
catch (e) {
console.error(PREFIX);
console.error(PREFIX + ' Failed to create the hook file in your .git/hooks folder because:');
console.error(PREFIX + ' ' + e.message);
console.error(PREFIX + ' The hook was not installed.');
console.error(PREFIX);
}
try {
fs.chmodSync(commitMsg, '777');
}
catch (e) {
console.error(PREFIX);
console.error(PREFIX + ' chmod 0777 the commit-msg file in your .git/hooks folder because:');
console.error(PREFIX + ' ' + e.message);
console.error('PREFIX');
}
// Function to recursively finding .git folder
function getGitFolderPath(currentPath) {
var git = path.resolve(currentPath, '.git');
if (!exists(git) || !fs.lstatSync(git).isDirectory()) {
console.log(PREFIX);
console.log(PREFIX + ': Not found .git folder in', git);
var newPath = path.resolve(currentPath, '..');
// Stop if we on top folder
if (currentPath === newPath) {
return null;
}
return getGitFolderPath(newPath);
}
console.log(PREFIX);
console.log(PREFIX = ' Found .git folder in', git);
return git;
}