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Diffstat (limited to 'src/node/cli/service_packager.js')
-rw-r--r-- | src/node/cli/service_packager.js | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/src/node/cli/service_packager.js b/src/node/cli/service_packager.js new file mode 100644 index 0000000000..f29180b252 --- /dev/null +++ b/src/node/cli/service_packager.js @@ -0,0 +1,142 @@ +/* + * + * Copyright 2015, Google Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ + +'use strict'; + +var fs = require('fs'); +var path = require('path'); + +var _ = require('underscore'); +var async = require('async'); +var pbjs = require('protobufjs/cli/pbjs'); +var parseArgs = require('minimist'); +var Mustache = require('mustache'); + +var package_json = require('../package.json'); + +var template_path = path.resolve(__dirname, 'service_packager'); + +var package_tpl_path = path.join(template_path, 'package.json.template'); + +var arg_format = { + string: ['include', 'out', 'name', 'version'], + alias: { + include: 'i', + out: 'o', + name: 'n', + version: 'v' + } +}; + +// TODO(mlumish): autogenerate README.md from proto file + +/** + * Render package.json file from template using provided parameters. + * @param {Object} params Map of parameter names to values + * @param {function(Error, string)} callback Callback to pass rendered template + * text to + */ +function generatePackage(params, callback) { + fs.readFile(package_tpl_path, {encoding: 'utf-8'}, function(err, template) { + if (err) { + callback(err); + } else { + var rendered = Mustache.render(template, params); + callback(null, rendered); + } + }); +} + +/** + * Copy a file + * @param {string} src_path The filepath to copy from + * @param {string} dest_path The filepath to copy to + */ +function copyFile(src_path, dest_path) { + fs.createReadStream(src_path).pipe(fs.createWriteStream(dest_path)); +} + +/** + * Run the script. Copies the index.js and LICENSE files to the output path, + * renders the package.json template to the output path, and generates a + * service.json file from the input proto files using pbjs. The arguments are + * taken directly from the command line, and handled as follows: + * -i (--include) : An include path for pbjs (can be dpulicated) + * -o (--output): The output path + * -n (--name): The name of the package + * -v (--version): The package version + * @param {Array} argv The argument vector + */ +function main(argv) { + var args = parseArgs(argv, arg_format); + var out_path = path.resolve(args.out); + var include_dirs = []; + if (args.include) { + include_dirs = _.map(_.flatten([args.include]), function(p) { + return path.resolve(p); + }); + } + args.grpc_version = package_json.version; + generatePackage(args, function(err, rendered) { + if (err) throw err; + fs.writeFile(path.join(out_path, 'package.json'), rendered, function(err) { + if (err) throw err; + }); + }); + copyFile(path.join(template_path, 'index.js'), + path.join(out_path, 'index.js')); + copyFile(path.join(__dirname, '..', 'LICENSE'), + path.join(out_path, 'LICENSE')); + + var service_stream = fs.createWriteStream(path.join(out_path, + 'service.json')); + var pbjs_args = _.flatten(['node', 'pbjs', + args._[0], + '-legacy', + _.map(include_dirs, function(dir) { + return "-path=" + dir; + })]); + var old_stdout = process.stdout; + process.__defineGetter__('stdout', function() { + return service_stream; + }); + var pbjs_status = pbjs.main(pbjs_args); + process.__defineGetter__('stdout', function() { + return old_stdout; + }); + if (pbjs_status !== pbjs.STATUS_OK) { + throw new Error('pbjs failed with status code ' + pbjs_status); + } +} + +exports.main = main; |