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procfile.js
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procfile.js
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var fs = require('fs');
var cons = require('./console').Console;
var path = require('path');
// Parse Procfile
function procs(procdata){
var processes = {};
procdata.toString().split(/\n/).forEach(function(line, lineNo) {
if(!line || line[0] === '#') { return; }
lineNo += 1;
var tuple = /^([^:]*):(.*)$/m.exec(line);
var prockey = tuple && tuple[1].trim();
var command = tuple && tuple[2].trim();
if(!prockey) {
throw new Error('Syntax Error in Procfile, Line ' + lineNo + ': No Prockey Found');
}
if(!command) {
throw new Error('Syntax Error in Procfile, Line ' + lineNo + ': No Command Found');
}
processes[prockey] = command;
});
return processes;
}
// Look for a Procfile at the Specified Location
function loadProc(filename) {
try {
var data = fs.readFileSync(filename);
return procs(data);
} catch(e) {
cons.Warn(e.message);
if(fs.existsSync('package.json')) {
cons.Alert("package.json file found - trying 'npm start'");
return procs("web: npm start");
} else {
cons.Error("No Procfile and no package.json file found in Current Directory - See " + path.basename(process.argv[1]) + " --help");
return;
}
}
}
module.exports.loadProc = loadProc;
module.exports.procs = procs;