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index.js
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index.js
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var os = require('os');
var fs = require('fs');
var exec = require('child_process').execSync;
var format = require('string-format');
var nodemailer = require('nodemailer');
var transporter = nodemailer.createTransport();
format.extend(String.prototype);
function run_cmd(cmd) {
try {
exec(cmd);
} catch (e) {
return true;
}
}
/**
* Creates a new `PostReceive` instance.
* @name PostReceive
* @function
* @param {Object} options An object containing the following fields:
*
* - `cwd` (String): The working directory to start processing in
* - `logging` (Boolean): Output logs if `true`
* - `config` (Object): The `options.json` to use for the build process (see example)
*/
var PostReceive = function(options) {
var self = this;
self.wk_path = options.cwd;
self.logging = options.logging;
self.options = options.config;
self.hostname = options.hostname || os.hostname();
self.load_options();
};
/**
* Run the build process
* @name PostReceive.process
* @function
*/
PostReceive.prototype.process = function() {
var self = this;
self.orig_cwd = process.cwd();
process.chdir(self.wk_path);
if (self.options.build_cmd) {
self.run_commands(self.options.build_cmd);
}
if (self.options.copy_to) {
run_cmd('mkdir -p ' + self.options.copy_to);
self.options.ignore = (self.options.ignore || []).concat(['options.json', 'node_modules']);
self.clear_dir();
self.move_files();
process.chdir(self.options.copy_to);
if (self.options.start_cmd) {
self.run_commands(self.options.start_cmd);
}
} else {
self.error('no output directory specified in options.json');
}
self.log('finished');
process.chdir(self.orig_cwd);
if (self.options.url) {
self.log('site should now be live at ' + self.options.url);
}
};
/**
* Log a message if `this.logging`
* @name PostReceive.log
* @function
* @param {Anything} message Message to log to console
*/
PostReceive.prototype.log = function(message) {
if (this.logging) {
console.log('post-receive:', message);
}
};
/**
* Parse `this.options` to load host specific options
* @name PostReceive.load_options
* @function
*/
PostReceive.prototype.load_options = function() {
var self = this;
for (var option in (self.options.hosts && self.options.hosts[self.hostname])) {
self.options[option] = self.options.hosts[self.hostname][option];
}
};
/**
* Run list of shell commands sequentially, handling errors
* @name PostReceive.run_commands
* @function
* @param {Array} commands List of commands to run
*/
PostReceive.prototype.run_commands = function(commands) {
var self = this;
commands.forEach(function(cmd) {
self.log('running "{}"'.format(cmd));
if (run_cmd(cmd)) {
self.error('{} failed'.format(cmd));
}
});
};
/**
* Empty the `copy_to` directory, excluding paths in ignore list
* @name PostReceive.clear_dir
* @function
*/
PostReceive.prototype.clear_dir = function() {
var self = this;
var wk_path = process.cwd();
var directory = self.options.copy_to;
var patterns = self.options.ignore;
process.chdir(directory);
self.log('removing files from ' + directory);
patterns = patterns.map(function(p) {
return fs.existsSync(p) && fs.lstatSync(p).isDirectory() ? p + '/*' : p;
});
var d = "' ! -path './";
var cmd = "find . ! -path './{}' -delete".format(patterns.join(d));
run_cmd(cmd);
process.chdir(wk_path);
};
/**
* Copy processed files to `copy_to` directory, excluding paths in ignore list
* @name PostReceive.move_files
* @function
*/
PostReceive.prototype.move_files = function() {
var self = this;
var copy_from = self.options.copy_from;
var copy_to = self.options.copy_to;
var patterns = self.options.ignore;
self.log('copying files to ' + copy_to);
var cmd = 'rsync -r --exclude="{pattern}" {input}/. {out}'.format({
pattern: patterns.join('" --exclude="'),
input: copy_from || '.',
out: copy_to
});
run_cmd(cmd);
};
/**
* Handle build error
* @name PostReceive.error
* @function
* @param {String} message Error message to be logged and sent in build failed email
*/
PostReceive.prototype.error = function(message) {
var self = this;
var name = self.wk_path;
if (self.options.email) {
var subject = name + ' build failed';
var body = '{} failed to build correctly at {}\nError message: {}'
.format(name, Date.toString(), message);
transporter.sendMail({
to: self.options.email,
subject: subject,
text: body
});
}
process.chdir(self.orig_cwd);
throw('post-receive [error]: ' + message);
};
module.exports = PostReceive;