git-stats-importer/lib/index.js

Imports your commits from a repository into git-stats history.

"use strict";

// Dependencies
var GitLogParser = require("gitlog-parser").parse,
    Ul = require("ul"),
    Typpy = require("typpy"),
    Events = require("events"),
    EventEmitter = Events.EventEmitter,
    GitStats = require("git-stats"),
    ParentSearch = require("parent-search"),
    OneByOne = require("one-by-one"),
    ChildProcess = require("child_process"),
    Spawn = ChildProcess.spawn,
    GitRepos = require("git-repos"),
    OArgv = require("oargv");

/**
 * Importer
 * Creates a new `Importer` instance.
 *
 * @name Importer
 * @function
 * @param {Object} options The `GitStatsImporter` options.
 * @param {GitStats} gs The `GitStats` instance.
 * @param {Object} data The commit data.
 * @return {Importer} The `Importer` instance.
 */
function Importer(options, gs, data) {
    this.path = options.path;
    this.emails = options.emails;
    this.ev = new EventEmitter();
    this.gs = gs;
    this.data = data;
}

/**
 * stream
 * Spawns the `git log` command and returns the stdout stream.
 *
 * @name stream
 * @function
 * @return {Stream} The stdout stream of `git log` command.
 */
Importer.prototype.stream = function () {
    var self = this,
        args = OArgv({
        author: this.emails,
        color: "never",
        __: "="
    }, "log"),
        pr = Spawn("git", args, { cwd: this.path });

    return pr.stdout;
};

/**
 * iterate
 * Emits the `commmit`, `error` and `finish` events.
 *
 * @name iterate
 * @function
 */
Importer.prototype.iterate = function () {
    var self = this;
    GitLogParser(self.stream()).on("commit", function (commit) {
        if (!commit) {
            return;
        }
        self.ev.emit("commit", commit);
    }).on("error", function (err) {
        self.emit("error");
    }).on("finish", function () {
        self.ev.emit("finish");
    });
};

/**
 * delete
 * Deletes the selected commits.
 *
 * @name delete
 * @function
 */
Importer.prototype.delete = function () {
    var self = this;
    self.ev.on("commit", function (commit) {
        self.gs.removeCommit({
            date: commit.date,
            hash: commit.hash,
            save: false,
            _data: self.data
        });
        self.ev.emit("delete", {
            path: self.path,
            commit: commit
        });
    });
    self.iterate();
};

/**
 * import
 * Imports the selected commits.
 *
 * @name import
 * @function
 */
Importer.prototype.import = function () {
    var self = this;
    self.ev.on("commit", function (commit) {
        self.gs.record({
            date: commit.date,
            hash: commit.hash,
            save: false,
            _data: self.data
        });
        self.ev.emit("import", {
            path: self.path,
            commit: commit
        });
    });
    self.iterate();
};

/**
 * GitStatsImporter
 * Creates a new instance of `GitStatsImporter`.
 *
 * @name GitStatsImporter
 * @function
 * @param {Object} options An object containing the following fields:
 *
 *  - `path` (String): The repository path.
 *  - `delete` (Boolean): If `true`, it will delete the commits from the history.
 *  - `recursive` (Boolean): If `true` the tool will search for repositories in the specified path, recursively.
 *  - `emails` (Array): An array with the emails that were used in the commits you want to import.
 *
 * @return {GitStatsImporter} The `GitStatsImporter` instance.
 */
function GitStatsImporter(options) {

    var ev = new EventEmitter(),
        gs = new GitStats();

    if (Typpy(options, String)) {
        options = {
            path: options
        };
    }

    options = Ul.merge(options, {
        delete: false,
        path: process.cwd(),
        recursive: false
    });

    function start() {
        // Init the config
        OneByOne([gs.initConfig.bind(gs), gs.get.bind(gs), function (next, data) {
            var queue = [],
                searcher = null;

            function importPath(path, cb) {
                var ops = Ul.clone(options);
                ops.path = path;

                var importer = new Importer(ops, gs, data);

                importer.ev.on("error", ev.emit.bind(ev, "delete"));
                importer.ev.on("import", ev.emit.bind(ev, "import"));
                importer.ev.on("delete", ev.emit.bind(ev, "delete"));
                importer.ev.on("finish", function () {
                    cb();
                });

                if (options.delete) {
                    importer.delete();
                } else {
                    importer.import();
                }
            }

            if (options.recursive) {
                var foos = [];
                searcher = GitRepos(options.path, function (err, dir) {
                    if (err) {
                        return ev.emit("error", err);
                    }
                    ev.emit("gitFolder", dir);
                    foos.push(importPath.bind(this, dir));
                });
                searcher.on("end", function () {
                    OneByOne(foos, function (err) {
                        next(err, data);
                    });
                });
            } else {
                importPath(options.path, function (err) {
                    next(err, data);
                });
            }
        }, function (next, data) {
            gs.save(data, next);
        }], function (err, data) {
            ev.emit("finish", err, data);
        });
    }

    if (!options.recursive) {
        ParentSearch(options.path, ".git", {
            obj: true
        }, function (err, d) {
            if (err) {
                return ev.emit("error", err);
            }
            if (d === null) {
                return ev.emit("error", new Error("This is not a git repository."));
            }
            options.path = d.d;
            start();
        });
    } else {
        process.nextTick(start);
    }

    return ev;
}

module.exports = GitStatsImporter;