Initial commit

LICENSE.md

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+The MIT License (MIT)
+
+Copyright (c) 2015 Alexander Gugel <alexander.gugel@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

Makefile

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+CURRENT_DIR = $(shell pwd)
+INSTALL_DIR = /usr/local/lib/node_modules
+BIN_DIR = /usr/local/bin
+BIN = mpm
+
+PHONY: install
+
+# http://blog.jgc.org/2015/04/the-one-line-you-should-add-to-every.html
+print-%: ; @echo $*=$($*)
+
+preinstall:
+	mkdir -p $(INSTALL_DIR); \
+	mkdir -p $(BIN_DIR)
+
+link: preinstall
+	ln -s $(CURRENT_DIR) $(INSTALL_DIR)/$(BIN); \
+	ln -s $(INSTALL_DIR)/mpm/cli.js $(BIN_DIR)/mpm
+
+install: preinstall
+	cp -R $(CURRENT_DIR) $(INSTALL_DIR)/$(BIN); \
+	ln -s $(INSTALL_DIR)/mpm/cli.js $(BIN_DIR)/mpm
+
+uninstall:
+	rm -rf $(INSTALL_DIR)/$(BIN); \
+	rm $(BIN_DIR)/$(BIN)

README.md

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+mpm
+===
+
+A *roughly* [**npm install**](https://www.npmjs.com/)-compatible package manager for Node.JS in **~100** lines of code.
+
+* implements `npm`'s basic [install algorithm](https://docs.npmjs.com/cli/install#algorithm)
+* correctly resolves (circular) dependencies
+* supports [semver](http://semver.org/)
+* correctly deals with `devDependencies`
+* interfaces with the [npm registry](https://www.npmjs.org/)
+
+Installation
+------------
+
+```
+  git clone https://github.com/alexanderGugel/mpm mpm && cd $_ && make install
+```
+
+Usage
+-----
+
+TODO
+
+Dependencies
+------------
+
+The dependencies are checked into the repo. `mpm` does not rely on `npm` to install its dependencies.
+
+* [`semver`](https://www.npmjs.com/package/semver)
+* [`mkdirp`](https://www.npmjs.com/package/mkdirp)
+* [`gunzip-maybe`](https://www.npmjs.com/package/gunzip-maybe)
+* [`tar-fs`](https://www.npmjs.com/package/tar-fs)
+
+License
+-------
+
+See [LICENSE.md](LICENSE.md).

TODO.md

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+- [ ] Tests
+- [ ] Better error handling
+- [ ] `install -g`
+- [ ] Handle binaries
+- [ ] Scripts
+- [ ] Install from arbitrary tarball
+- [ ] Install from git repo
+- [ ] Install from BitTorrent (via DHT)

cli.js

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+#!/usr/bin/env node
+var path = require('path')
+var http = require('http')
+var fs = require('fs')
+var semver = require('semver')
+var gunzip = require('gunzip-maybe')
+var mkdirp = require('mkdirp')
+var tar = require('tar-fs')
+
+function resolve (dep, version, cb) {
+  console.info('resolving', dep + '@' + version)
+  http.get('http://registry.npmjs.org/' + dep, function (res) {
+    var raw = ''
+    res.on('data', function (chunk) { raw += chunk }).on('end', function () {
+      var parsed = JSON.parse(raw)
+      var resolved = parsed.versions[semver.maxSatisfying(Object.keys(parsed.versions), version)]
+      cb(resolved ? null : new Error('No satisfying target found for ' + dep + '@' + version), resolved)
+    }).on('error', cb)
+  }).on('error', cb)
+}
+
+function fetch (where, what) {
+  console.info('fetching', what.name + '@' + what.version, 'into', path.relative(__dirname, where))
+  http.get(what.dist.tarball, function (res) {
+    res.pipe(gunzip()).pipe(tar.extract(where, {
+      map: function (header) {
+        header.name = header.name.substr('package/'.length)
+        return header
+      },
+      ignore: function (name) {
+        return name === path.join(where, 'package.json')
+      }
+    }))
+  })
+}
+
+function install (where, what, family, entry) {
+  console.info('installing', what.name + '@' + what.version, 'into', path.relative(__dirname, where))
+  family = family.slice()
+  mkdirp.sync(where)
+  var deps = []
+  function onResolved (err, resolved) {
+    if (err) throw err
+    deps.push(resolved)
+    if (deps.length === Object.keys(what.dependencies).length) onResolvedAll()
+  }
+  function onResolvedAll () {
+    deps.forEach(function (dep) {
+      if (family.indexOf(dep.dist.shasum) > -1) return
+      family.push(dep.dist.shasum)
+      // `entry ? [] : family` ensures that uninstalling a single "immediate"
+      // dependency doesn't break subsequent dependencies.
+      process.nextTick(install.bind(null, path.join(where, 'node_modules', dep.name), dep, entry ? [] : family))
+    })
+  }
+  for (var dep in what.dependencies)
+    resolve(dep, what.dependencies[dep], onResolved)
+  if (entry) {
+    for (dep in what.devDependencies)
+      resolve(dep, what.devDependencies[dep], onResolved)
+  } else {
+    fs.writeFile(path.join(where, 'package.json'), JSON.stringify(what, null, 2))
+    fetch(where, what)
+  }
+}
+
+var target = process.argv[2]
+if (target) {
+  resolve(target, target.split('@')[1] || '*', function (err, what) {
+    if (err) throw err
+    install(path.join(__dirname, 'node_modules', what.name), what, [])
+  })
+} else {
+  var entry = JSON.parse(fs.readFileSync(path.join(__dirname, 'package.json')))
+  install(__dirname, entry, [], true)
+}