gistfile1.txt

'use strict';
var _ = require('lodash');
var argv = require('yargs').argv;
var exec = require('child_process').exec;
module.exports = function(gulp) {
    gulp.task('mercurial-tag', function(done) {
        var buildLabel = argv.build_label;
        if (_.isUndefined(buildLabel)) {
            throw 'label is required for versioning';
        }
        var message = 'Tagging build ' + buildLabel;
        var tag = buildLabel;
        exec('hg revert --all', function(error, stdout, stderr) {
            if (error !== null) {
                throw error;
            }
            exec('hg tag --force --message "' + message + '" "' + tag + '"', function(error, stdout, stderr) {
                if (error !== null) {
                    throw error;
                }
                done();
            });
        });
    });
    gulp.task('mercurial-push', function(done) {
        var attemptPush = function(currentTry, maxTry) {
            if (currentTry > maxTry) {
                throw 'Took more than ' + maxTry + ' to push.';
            }
            exec('hg pull', function(error, stdout, stderr) {
                if (error !== null) {
                    throw error;
                }
                exec('hg heads . --template "." --topo', function(error, stdout, stderr) {
                    if (error !== null) {
                        throw error;
                    }
                    var headCount = stdout.match(/\./g).length;
                    var push = function() {
                        exec('hg push --branch .', function(error, stdout, stderr) {
                            if (error !== null) {
                                console.log('Error pushing to remote, trying again.');
                                attemptPush(currentTry + 1, maxTry);
                            }
                            done();
                        });
                    };
                    if (headCount > 1) {
                        var mergeCommand = 'hg merge ';
                        mergeCommand += '--config "merge-patterns..hgtags=merge-tags" ';
                        mergeCommand += '--config "merge-tools.merge-tags.executable=powershell.exe" ';
                        mergeCommand += '--config "merge-tools.merge-tags.args=-ExecutionPolicy Unrestricted -File .\\Scripts\\MergeTags.ps1 -local \\"$local\\" -other \\"$other\\" -output \\"$output\\""';
                        exec(mergeCommand, function(error, stdout, stderr) {
                            if (error !== null) {
                                throw error;
                            }
                            exec('hg commit -m "Merge"', function(error, stdout, stderr) {
                                if (error !== null) {
                                    throw error;
                                }
                                push();
                            });
                        });
                    } else {
                        push();
                    }
                });
            });
        };
        attemptPush(1, 10);
    });
};