Remove lodash dependency

4 files changed, 54 insertions, 41 deletions

diff --git a/lib/utils/command.js b/lib/utils/command.js
index 93df750..083e72e 100644
--- a/lib/utils/command.js
+++ b/lib/utils/command.js
@@ -1,4 +1,3 @@
-var _ = require('lodash');
 var childProcess = require('child_process');
 var spawn = require('spawn-cmd').spawn;
 var Promise = require('./promise');
@@ -62,15 +61,22 @@ function escapeShellArg(s) {
 }
 
 function optionsToShellArgs(options) {
-    return _.chain(options)
-    .map(function(value, key) {
-        if (value === null || value === undefined || value === false) return null;
-        if (value === true) return key;
-        return key + '=' + escapeShellArg(value);
-    })
-    .compact()
-    .value()
-    .join(' ');
+    var result = [];
+
+    for (var key in options) {
+        var value = options[key];
+
+        if (value === null || value === undefined || value === false) {
+            continue;
+        }
+        if (value === true) {
+            result.push(key);
+        }
+
+        result.push(key + '=' + escapeShellArg(value));
+    }
+
+    return result.join(' ');
 }
 
 module.exports = {
diff --git a/lib/utils/git.js b/lib/utils/git.js
index 52b1096..6884b83 100644
--- a/lib/utils/git.js
+++ b/lib/utils/git.js
@@ -1,4 +1,4 @@
-var _ = require('lodash');
+var is = require('is');
 var path = require('path');
 var crc = require('crc');
 var URI = require('urijs');
@@ -69,7 +69,7 @@ Git.prototype.resolve = function(giturl) {
         if (this.resolveRoot(giturl)) return Promise(giturl);
         return Promise(null);
     }
-    if (_.isString(giturl)) giturl = Git.parseUrl(giturl);
+    if (is.string(giturl)) giturl = Git.parseUrl(giturl);
     if (!giturl) return Promise(null);
 
     // Clone or get from cache
@@ -88,8 +88,10 @@ Git.prototype.resolveRoot = function(filepath) {
 
     // Extract first directory (is the repo id)
     relativeToGit = path.relative(this.tmpDir, filepath);
-    repoId = _.first(relativeToGit.split(path.sep));
-    if (!repoId) return;
+    repoId = relativeToGit.split(path.sep)[0];
+    if (!repoId) {
+        return;
+    }
 
     // Return an absolute file
     return path.resolve(this.tmpDir, repoId);
@@ -114,10 +116,12 @@ Git.parseUrl = function(giturl) {
     // Extract file inside the repo (after the .git)
     fileParts = uri.path().split('.git');
     filepath = fileParts.length > 1? fileParts.slice(1).join('.git') : '';
-    if (filepath[0] == '/') filepath = filepath.slice(1);
+    if (filepath[0] == '/') {
+        filepath = filepath.slice(1);
+    }
 
     // Recreate pathname without the real filename
-    uri.path(_.first(fileParts)+'.git');
+    uri.path(fileParts[0] + '.git');
 
     return {
         host: uri.toString(),
diff --git a/lib/utils/logger.js b/lib/utils/logger.js
index fc9c394..3bde904 100644
--- a/lib/utils/logger.js
+++ b/lib/utils/logger.js
@@ -1,21 +1,22 @@
-var _ = require('lodash');
+var is = require('is');
 var util = require('util');
 var color = require('bash-color');
+var Immutable = require('immutable');
 
-var LEVELS = {
+var LEVELS = Immutable.Map({
     DEBUG: 0,
     INFO: 1,
     WARN: 2,
     ERROR: 3,
     DISABLED: 10
-};
+});
 
-var COLORS = {
+var COLORS = Immutable.Map({
     DEBUG: color.purple,
     INFO: color.cyan,
     WARN: color.yellow,
     ERROR: color.red
-};
+});
 
 function Logger(write, logLevel) {
     if (!(this instanceof Logger)) return new Logger(write, logLevel);
@@ -29,17 +30,18 @@ function Logger(write, logLevel) {
 
     this.setLevel(logLevel || 'info');
 
-    _.bindAll(this);
-
     // Create easy-to-use method like "logger.debug.ln('....')"
-    _.each(_.omit(LEVELS, 'DISABLED'), function(level, levelKey) {
+    LEVELS.forEach(function(level, levelKey) {
+        if (levelKey === 'DISABLED') {
+            return;
+        }
         levelKey = levelKey.toLowerCase();
 
-        this[levelKey] = _.partial(this.log, level);
-        this[levelKey].ln = _.partial(this.logLn, level);
-        this[levelKey].ok = _.partial(this.ok, level);
-        this[levelKey].fail = _.partial(this.fail, level);
-        this[levelKey].promise = _.partial(this.promise, level);
+        this[levelKey] =            this.log.bind(this, level);
+        this[levelKey].ln =         this.logLn.bind(this, level);
+        this[levelKey].ok =         this.ok.bind(this, level);
+        this[levelKey].fail =       this.fail.bind(this, level);
+        this[levelKey].promise =    this.promise.bind(this, level);
     }, this);
 }
 
@@ -49,7 +51,11 @@ function Logger(write, logLevel) {
     @param {String} logLevel
 */
 Logger.prototype.setLevel = function(logLevel) {
-    if (_.isString(logLevel)) logLevel = LEVELS[logLevel.toUpperCase()];
+    if (is.string(logLevel)) {
+        logLevel = logLevel.toUpperCase();
+        logLevel = LEVELS.get(logLevel);
+    }
+
     this.logLevel = logLevel;
 };
 
@@ -60,7 +66,7 @@ Logger.prototype.setLevel = function(logLevel) {
 */
 Logger.prototype.write = function(msg) {
     msg = msg.toString();
-    this.lastChar = _.last(msg);
+    this.lastChar = msg[msg.length - 1];
     return this._write(msg);
 };
 
@@ -88,12 +94,14 @@ Logger.prototype.writeLn = function(msg) {
 Logger.prototype.log = function(level) {
     if (level < this.logLevel) return;
 
-    var levelKey = _.findKey(LEVELS, function(v) { return v == level; });
+    var levelKey = LEVELS.findKey(function(v) {
+        return v === level;
+    });
     var args = Array.prototype.slice.apply(arguments, [1]);
     var msg = this.format.apply(this, args);
 
     if (this.lastChar == '\n') {
-        msg = COLORS[levelKey](levelKey.toLowerCase()+':')+' '+msg;
+        msg = COLORS.get(levelKey)(levelKey.toLowerCase()+':')+' '+msg;
     }
 
     return this.write(msg);
@@ -151,6 +159,5 @@ Logger.prototype.promise = function(level, p) {
 };
 
 Logger.LEVELS = LEVELS;
-Logger.COLORS = COLORS;
 
 module.exports =  Logger;
diff --git a/lib/utils/path.js b/lib/utils/path.js
index a4968c8..9daa8e6 100644
--- a/lib/utils/path.js
+++ b/lib/utils/path.js
@@ -1,6 +1,4 @@
-var _ = require('lodash');
 var path = require('path');
-
 var error = require('./error');
 
 // Normalize a filename
@@ -18,17 +16,15 @@ function isInRoot(root, filename) {
 // Throw error if file is outside this folder
 function resolveInRoot(root) {
     var input, result;
+    var args = Array.prototype.slice.call(arguments, 1);
 
-    input = _.chain(arguments)
-        .toArray()
-        .slice(1)
+    input = args
         .reduce(function(current, p) {
             // Handle path relative to book root ("/README.md")
             if (p[0] == '/' || p[0] == '\\') return p.slice(1);
 
             return current? path.join(current, p) : path.normalize(p);
-        }, '')
-        .value();
+        }, '');
 
     result = path.resolve(root, input);