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gaia/tests/taskcluster/bin/autolander

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+#! /usr/bin/env node
+
+/**
+ * Gaia autoland task definitions and outputs content to /autolander.json.
+ */
+var decorate = require('../lib/decorate_task');
+var yaml = require('js-yaml');
+var fs = require('fs');
+var fsPath = require('path');
+var util = require('util');
+var template = require('json-templater/object');
+
+// Cache for task definitions...
+var TASK_DEFINITIONS = {};
+function loadTask(name, parameters) {
+  if (!TASK_DEFINITIONS[name]) {
+    var path = fsPath.resolve(__dirname + '/../tasks/' + name + '.yml');
+    TASK_DEFINITIONS[name] = yaml.safeLoad(fs.readFileSync(path));
+  }
+
+  // decorate_task hook.
+  parameters.externalHook = true;
+
+  return decorate(TASK_DEFINITIONS[name], parameters);
+}
+
+function params() {
+  return Array.prototype.slice.call(arguments).reduce(function(target, props) {
+    for (var key in props) target[key] = props[key];
+    return target;
+  }, {});
+}
+
+// List of all the possible definitions...
+var config = yaml.safeLoad(fs.readFileSync(__dirname + '/../autolander.yml'));
+
+// Final task graph definition place holder...
+var graph = {
+  tasks: []
+};
+
+// Expand all tasks based on the `tasks.yml` file...
+Object.keys(config.definitions).forEach(function(name) {
+  var definition = config.definitions[name];
+
+  // If we are not using chunks don't loop.
+  if (!definition || !definition.chunks) {
+    var task = loadTask(name, params(config.params, {
+      // Useful for environment variables.
+      process: process
+    }));
+
+    graph.tasks.push(task);
+    return;
+  }
+
+  // Handle all chunking options...
+  for (var chunk = 1; chunk <= definition.chunks; chunk++) {
+    // In practice relying on chunks in the graph is probably a bad idea unless
+    // doing it explicitly with some sort of specific logic but here for
+    // consistency.
+    var task = loadTask(name, params(config.params, {
+      // Allow process to be used in variables useful for process.env.
+      process: process,
+
+      // Chunk parameters
+      chunk: chunk,
+      totalChunks: definition.chunks,
+
+      // whether this is a private image
+      privateImage: definition.privateImage,
+    }));
+    graph.tasks.push(task);
+  }
+});
+
+graph.tasks = graph.tasks.map(function(task) {
+  return template(task);
+});
+
+// Write the content to autolander.json
+var jsonPath = fsPath.resolve(__dirname + '/../../../autolander.json');
+fs.writeFileSync(jsonPath, JSON.stringify(graph, null, 2));