Version 1

[yaffs-website] / node_modules / grunt / node_modules / resolve / lib / async.js

diff --git a/node_modules/grunt/node_modules/resolve/lib/async.js b/node_modules/grunt/node_modules/resolve/lib/async.js
new file mode 100644 (file)
index 0000000..0f0eeca
--- /dev/null
+++ b/node_modules/grunt/node_modules/resolve/lib/async.js
@@ -0,0 +1,192 @@
+var core = require('./core');
+var fs = require('fs');
+var path = require('path');
+var caller = require('./caller.js');
+var nodeModulesPaths = require('./node-modules-paths.js');
+var splitRe = process.platform === 'win32' ? /[\/\\]/ : /\//;
+
+module.exports = function resolve (x, opts, cb) {
+    if (typeof opts === 'function') {
+        cb = opts;
+        opts = {};
+    }
+    if (!opts) opts = {};
+    if (typeof x !== 'string') {
+        return process.nextTick(function () {
+            cb(new Error('path must be a string'));
+        });
+    }
+    
+    var isFile = opts.isFile || function (file, cb) {
+        fs.stat(file, function (err, stat) {
+            if (err && err.code === 'ENOENT') cb(null, false)
+            else if (err) cb(err)
+            else cb(null, stat.isFile() || stat.isFIFO())
+        });
+    };
+    var readFile = opts.readFile || fs.readFile;
+    
+    var extensions = opts.extensions || [ '.js' ];
+    var y = opts.basedir || path.dirname(caller());
+    
+    opts.paths = opts.paths || [];
+    
+    if (/^(?:\.\.?(?:\/|$)|\/|([A-Za-z]:)?[\\\/])/.test(x)) {
+        var res = path.resolve(y, x);
+        if (x === '..') res += '/';
+        if (/\/$/.test(x) && res === y) {
+            loadAsDirectory(res, opts.package, onfile);
+        }
+        else loadAsFile(res, opts.package, onfile);
+    }
+    else loadNodeModules(x, y, function (err, n, pkg) {
+        if (err) cb(err)
+        else if (n) cb(null, n, pkg)
+        else if (core[x]) return cb(null, x);
+        else cb(new Error("Cannot find module '" + x + "' from '" + y + "'"))
+    });
+    
+    function onfile (err, m, pkg) {
+        if (err) cb(err)
+        else if (m) cb(null, m, pkg)
+        else loadAsDirectory(res, function (err, d, pkg) {
+            if (err) cb(err)
+            else if (d) cb(null, d, pkg)
+            else cb(new Error("Cannot find module '" + x + "' from '" + y + "'"))
+        })
+    }
+    
+    function loadAsFile (x, pkg, cb) {
+        if (typeof pkg === 'function') {
+            cb = pkg;
+            pkg = undefined;
+        }
+        
+        var exts = [''].concat(extensions);
+        load(exts, x, pkg)
+               
+               function load (exts, x, pkg) {
+            if (exts.length === 0) return cb(null, undefined, pkg);
+            var file = x + exts[0];
+            
+            if (pkg) onpkg(null, pkg)
+            else loadpkg(path.dirname(file), onpkg);
+            
+            function onpkg (err, pkg_, dir) {
+                pkg = pkg_;
+                if (err) return cb(err)
+                if (dir && pkg && opts.pathFilter) {
+                    var rfile = path.relative(dir, file);
+                    var rel = rfile.slice(0, rfile.length - exts[0].length);
+                    var r = opts.pathFilter(pkg, x, rel);
+                    if (r) return load(
+                        [''].concat(extensions.slice()),
+                        path.resolve(dir, r),
+                        pkg
+                    );
+                }
+                isFile(file, onex);
+            }
+            function onex (err, ex) {
+                if (err) cb(err)
+                else if (!ex) load(exts.slice(1), x, pkg)
+                else cb(null, file, pkg)
+            }
+        }
+    }
+    
+    function loadpkg (dir, cb) {
+        if (dir === '' || dir === '/') return cb(null);
+        if (process.platform === 'win32' && /^\w:[\\\/]*$/.test(dir)) {
+            return cb(null);
+        }
+        if (/[\\\/]node_modules[\\\/]*$/.test(dir)) return cb(null);
+        
+        var pkgfile = path.join(dir, 'package.json');
+        isFile(pkgfile, function (err, ex) {
+            // on err, ex is false
+            if (!ex) return loadpkg(
+                path.dirname(dir), cb
+            );
+            
+            readFile(pkgfile, function (err, body) {
+                if (err) cb(err);
+                try { var pkg = JSON.parse(body) }
+                catch (err) {}
+                
+                if (pkg && opts.packageFilter) {
+                    pkg = opts.packageFilter(pkg, pkgfile);
+                }
+                cb(null, pkg, dir);
+            });
+        });
+    }
+    
+    function loadAsDirectory (x, fpkg, cb) {
+        if (typeof fpkg === 'function') {
+            cb = fpkg;
+            fpkg = opts.package;
+        }
+        
+        var pkgfile = path.join(x, '/package.json');
+        isFile(pkgfile, function (err, ex) {
+            if (err) return cb(err);
+            if (!ex) return loadAsFile(path.join(x, '/index'), fpkg, cb);
+            
+            readFile(pkgfile, function (err, body) {
+                if (err) return cb(err);
+                try {
+                    var pkg = JSON.parse(body);
+                }
+                catch (err) {}
+                
+                if (opts.packageFilter) {
+                    pkg = opts.packageFilter(pkg, pkgfile);
+                }
+                
+                if (pkg.main) {
+                    if (pkg.main === '.' || pkg.main === './'){
+                        pkg.main = 'index'
+                    }
+                    loadAsFile(path.resolve(x, pkg.main), pkg, function (err, m, pkg) {
+                        if (err) return cb(err);
+                        if (m) return cb(null, m, pkg);
+                        if (!pkg) return loadAsFile(path.join(x, '/index'), pkg, cb);
+
+                        var dir = path.resolve(x, pkg.main);
+                        loadAsDirectory(dir, pkg, function (err, n, pkg) {
+                            if (err) return cb(err);
+                            if (n) return cb(null, n, pkg);
+                            loadAsFile(path.join(x, '/index'), pkg, cb);
+                        });
+                    });
+                    return;
+                }
+                
+                loadAsFile(path.join(x, '/index'), pkg, cb);
+            });
+        });
+    }
+    
+    function loadNodeModules (x, start, cb) {
+        (function process (dirs) {
+            if (dirs.length === 0) return cb(null, undefined);
+            var dir = dirs[0];
+            
+            var file = path.join(dir, '/', x);
+            loadAsFile(file, undefined, onfile);
+            
+            function onfile (err, m, pkg) {
+                if (err) return cb(err);
+                if (m) return cb(null, m, pkg);
+                loadAsDirectory(path.join(dir, '/', x), undefined, ondir);
+            }
+            
+            function ondir (err, n, pkg) {
+                if (err) return cb(err);
+                if (n) return cb(null, n, pkg);
+                process(dirs.slice(1));
+            }
+        })(nodeModulesPaths(start, opts));
+    }
+};