fix(CLI): Adds CLI config and link plugin (#1601)

There is a pending change against the RN CLI to allow platform plugins to provide their own configuration and, optionally, plug into the `link` and `unlink` commands.

In terms of net new changes, the only files that need to be reviewed are:
- local-cli/link/index.js
- local-cli/platform.js
- package.json

All other files are copy/paste from React Native.

local-cli/core/windows/findDependencyProject.js

@@ -0,0 +1,21 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const findProjectWithFilePattern = require('./findProjectWithFilePattern');
+
+/**
+ * Find a C# dependency project file
+ *
+ * @param {String} folder Name of the folder where to seek
+ * @return {String}
+ */
+module.exports = function findDependencyProject(folder) {
+  return findProjectWithFilePattern(folder, /class\s+\S+\s*:\s*IReactPackage/);
+};

local-cli/core/windows/findMainFile.js

@@ -0,0 +1,34 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const glob = require('glob');
+const path = require('path');
+
+/**
+ * Find the main file for the C# project
+ *
+ * @param {String} folder Name of the folder where to seek
+ * @return {String}
+ */
+module.exports = function findMainFile(folder) {
+  let mainFilePath = glob.sync('MainReactNativeHost.cs', {
+    cwd: folder,
+    ignore: ['node_modules/**', '**/build/**', 'Examples/**', 'examples/**'],
+  });
+
+  if (mainFilePath.length === 0) {
+    mainFilePath = glob.sync('MainPage.cs', {
+      cwd: folder,
+      ignore: ['node_modules/**', '**/build/**', 'Examples/**', 'examples/**'],
+    });
+  }
+
+  return mainFilePath && mainFilePath.length > 0 ? path.join(folder, mainFilePath[0]) : null;
+};

local-cli/core/windows/findNamespace.js

@@ -0,0 +1,30 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const fs = require('fs');
+const glob = require('glob');
+const path = require('path');
+
+/**
+ * Gets package's namespace
+ * by searching for its declaration in all C# files present in the folder
+ *
+ * @param {String} folder Folder to find C# files
+ */
+module.exports = function getNamespace(folder) {
+  const files = glob.sync('**/*.cs', { cwd: folder });
+
+  const packages = files
+    .map(filePath => fs.readFileSync(path.join(folder, filePath), 'utf8'))
+    .map(file => file.match(/namespace (.*)[\s\S]+IReactPackage/))
+    .filter(match => match);
+
+  return packages.length ? packages[0][1] : null;
+};

local-cli/core/windows/findPackageClassName.js

@@ -0,0 +1,30 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const fs = require('fs');
+const glob = require('glob');
+const path = require('path');
+
+/**
+ * Gets package's class name (class that implements IReactPackage)
+ * by searching for its declaration in all C# files present in the folder
+ *
+ * @param {String} folder Folder to find C# files
+ */
+module.exports = function getPackageClassName(folder) {
+  const files = glob.sync('**/*.cs', { cwd: folder });
+
+  const packages = files
+    .map(filePath => fs.readFileSync(path.join(folder, filePath), 'utf8'))
+    .map(file => file.match(/class (.*) : IReactPackage/))
+    .filter(match => match);
+
+  return packages.length ? packages[0][1] : null;
+};

local-cli/core/windows/findProject.js

@@ -0,0 +1,21 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const findProjectWithFilePattern = require('./findProjectWithFilePattern');
+
+/**
+ * Find a C# dependency project file
+ *
+ * @param {String} folder Name of the folder where to seek
+ * @return {String}
+ */
+module.exports = function findDependencyProject(folder) {
+  return findProjectWithFilePattern(folder, /class\s+\S+\s*:\s*(ReactNativeHost|ReactPage)/);
+};

local-cli/core/windows/findProjectGUID.js

@@ -0,0 +1,22 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const fs = require('fs');
+
+/**
+ * Gets GUID of dependency project.
+ *
+ * @param {String} folder Path to dependency project .csproj
+ */
+module.exports = function findProjectGuid(path) {
+  const file = fs.readFileSync(path, 'utf8');
+  const result = file.match(/<ProjectGuid>\{(.*)\}<\/ProjectGuid>/);
+  return result ? result[1] : null;
+};

local-cli/core/windows/findProjectName.js

@@ -0,0 +1,22 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const fs = require('fs');
+
+/**
+ * Gets name of dependency project.
+ *
+ * @param {String} folder Path to dependency project .csproj
+ */
+module.exports = function findProjectGuid(path) {
+  const file = fs.readFileSync(path, 'utf8');
+  const result = file.match(/<AssemblyName>(.*)<\/AssemblyName>/);
+  return result ? result[1] : null;
+};

local-cli/core/windows/findProjectWithFilePattern.js

@@ -0,0 +1,47 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const fs = require('fs');
+const glob = require('glob');
+const path = require('path');
+
+/**
+ * Find an C# project file
+ *
+ * @param {String} folder Name of the folder where to seek
+ * @return {String}
+ */
+module.exports = function findProjectWithFilePattern(folder, pattern) {
+  const csprojPaths = glob.sync(path.join('**', '*.csproj'), {
+    cwd: folder,
+    ignore: ['node_modules/**', '**/build/**', 'Examples/**', 'examples/**', '**/bin/**', '**/obj/**' ],
+  });
+
+  // Search all folders with *.csproj files for one that exports an `IReactPackage` 
+  for (var csprojPath of csprojPaths) {
+    const csprojFullPath = path.join(folder, csprojPath);
+    const csprojDir = path.dirname(csprojFullPath);
+    const files = glob.sync(path.join('**', '*.cs'), {
+      cwd: csprojDir,
+      ignore: ['node_modules/**', '**/build/**', 'Examples/**', 'examples/**', '**/bin/**', '**/obj/**' ],
+    });
+
+    const packages = files
+      .map(filePath => fs.readFileSync(path.join(csprojDir, filePath), 'utf8'))
+      .map(file => file.match(pattern))
+      .filter(match => match);
+
+    if (packages.length) {
+      return csprojFullPath;
+    }
+  }
+
+  return null;
+};

local-cli/core/windows/findWindowsSolution.js

@@ -0,0 +1,60 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const glob = require('glob');
+const path = require('path');
+
+/**
+ * Glob pattern to look for solution file
+ */
+const GLOB_PATTERN = '**/*.sln';
+
+/**
+ * Regexp matching all test projects
+ */
+const TEST_PROJECTS = /test|example|sample/i;
+
+/**
+ * Base windows folder
+ */
+const WINDOWS_BASE = 'windows';
+
+/**
+ * These folders will be excluded from search to speed it up
+ */
+const GLOB_EXCLUDE_PATTERN = ['**/@(node_modules)/**'];
+
+/**
+ * Finds windows project by looking for all .sln files
+ * in given folder.
+ *
+ * Returns first match if files are found or null
+ *
+ * Note: `./windows/*.sln` are returned regardless of the name
+ */
+module.exports = function findSolution(folder) {
+  const projects = glob
+    .sync(GLOB_PATTERN, {
+      cwd: folder,
+      ignore: GLOB_EXCLUDE_PATTERN,
+    })
+    .filter(project => {
+      return path.dirname(project) === WINDOWS_BASE || !TEST_PROJECTS.test(project);
+    })
+    .sort((projectA, projectB) => {
+      return path.dirname(projectA) === WINDOWS_BASE ? -1 : 1;
+    });
+
+  if (projects.length === 0) {
+    return null;
+  }
+
+  return projects[0];
+};

local-cli/core/windows/index.js

@@ -0,0 +1,100 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const findWindowsSolution = require('./findWindowsSolution');
+const findNamespace = require('./findNamespace');
+const findProject = require('./findProject');
+const findDependencyProject = require('./findDependencyProject');
+const findProjectName = require('./findProjectName');
+const findProjectGUID = require('./findProjectGUID');
+const findPackageClassName = require('./findPackageClassName');
+const findMainFile = require('./findMainFile');
+const path = require('path');
+
+const relativeProjectPath = (fullProjPath) => {
+  const windowsPath = fullProjPath
+                  .substring(fullProjPath.lastIndexOf("node_modules") - 1, fullProjPath.length)
+                  .replace(/\//g, '\\');
+
+  return path.join('..', windowsPath);
+};
+
+/**
+ * Gets windows project config by analyzing given folder and taking some
+ * defaults specified by user into consideration
+ */
+exports.projectConfig = function projectConfigWindows(folder, userConfig) {
+
+  const csSolution = userConfig.csSolution || findWindowsSolution(folder);
+  const projectPath = userConfig.projectPath || findProject(folder);
+
+  if (!csSolution || !projectPath) {
+    return null;
+  }
+
+  // expects solutions to be named the same as project folders
+  const solutionPath = path.join(folder, csSolution);
+  const sourceDir = userConfig.sourceDir || path.dirname(projectPath);
+  const mainFilePath = findMainFile(sourceDir);
+
+  return {
+    sourceDir,
+    solutionPath,
+    projectPath,
+    mainFilePath,
+    folder,
+    userConfig,
+  };
+};
+
+/**
+ * Same as projectConfigWindows except it returns
+ * different config that applies to packages only
+ */
+exports.dependencyConfig = function dependencyConfigWindows(folder, userConfig) {
+
+  const projectPath = userConfig.projectPath || findDependencyProject(folder);
+
+  if (!projectPath) {
+    return null;
+  }
+
+  const sourceDir = userConfig.sourceDir || path.dirname(projectPath);
+  const packageClassName = findPackageClassName(sourceDir);
+  const namespace = userConfig.namespace || findNamespace(sourceDir);
+
+  /**
+   * This module has no package to export or no namespace
+   */
+  if (!packageClassName || !namespace) {
+    return null;
+  }
+
+  const packageUsingPath = userConfig.packageUsingPath ||
+    `using ${namespace};`;
+
+  const packageInstance = userConfig.packageInstance ||
+    `new ${packageClassName}()`;
+
+  const projectGUID = findProjectGUID(projectPath);
+  const projectName = findProjectName(projectPath);
+  const relativeProjPath = relativeProjectPath(projectPath);
+
+  return {
+    sourceDir,
+    packageUsingPath,
+    packageInstance,
+    projectName,
+    projectPath,
+    folder,
+    projectGUID,
+    relativeProjPath,
+  };
+};