Support for painless language autocomplete within monaco

.i18nrc.json

@@ -27,6 +27,7 @@
       "src/plugins/management"
     ],
     "maps_legacy": "src/plugins/maps_legacy",
+    "monaco": "packages/kbn-monaco/src",
     "indexPatternManagement": "src/plugins/index_pattern_management",
     "advancedSettings": "src/plugins/advanced_settings",
     "kibana_legacy": "src/plugins/kibana_legacy",

packages/kbn-monaco/scripts/constants.js

@@ -0,0 +1,52 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+module.exports = {
+  licenseHeader: `/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+`,
+  supportedContexts: [
+    'boolean_script_field_script_field',
+    'date_script_field',
+    'double_script_field_script_field',
+    'filter',
+    'ip_script_field_script_field',
+    'long_script_field_script_field',
+    'painless_test',
+    'processor_conditional',
+    'score',
+    'string_script_field_script_field',
+  ],
+};

packages/kbn-monaco/scripts/generate_autocomplete.js

@@ -0,0 +1,102 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+const { join } = require('path');
+const { readdirSync, readFileSync, writeFileSync } = require('fs');
+const minimist = require('minimist');
+const semver = require('semver');
+const ora = require('ora');
+const del = require('del');
+
+const {
+  cloneAndCheckout,
+  createAutocompleteDefinitions,
+  createAutocompleteExports,
+} = require('./utils');
+const { supportedContexts } = require('./constants');
+
+start(
+  minimist(process.argv.slice(2), {
+    string: ['tag', 'branch'],
+  })
+);
+
+function start(opts) {
+  const log = ora('Loading Elasticsearch repository').start();
+
+  if (opts.branch == null && semver.valid(opts.tag) === null) {
+    log.fail(`Missing or invalid tag: ${opts.tag}`);
+    return;
+  }
+
+  const autocompleteOutputFolder = join(
+    __dirname,
+    '..',
+    'src',
+    'painless',
+    'autocomplete_definitions'
+  );
+
+  log.text = 'Cleaning autocomplete definitions folder';
+  del.sync([`${autocompleteOutputFolder}/**`]);
+
+  cloneAndCheckout(
+    { log, tag: opts.tag, branch: opts.branch },
+    (err, { esPainlessContextFolder }) => {
+      if (err) {
+        log.fail(err.message);
+        return;
+      }
+
+      const painlessContextFolderContents = readdirSync(esPainlessContextFolder);
+
+      // Generate autocomplete definitions
+      painlessContextFolderContents
+        .filter((file) => {
+          // Expected filename format: whitelist-<contextName>.json
+          const contextName = file.split('.')[0].split('whitelist-').pop();
+          return supportedContexts.includes(contextName);
+        })
+        .forEach((file) => {
+          try {
+            const { name, classes: painlessClasses } = JSON.parse(
+              readFileSync(join(esPainlessContextFolder, file), 'utf8')
+            );
+            const filePath = join(autocompleteOutputFolder, `${name}.json`);
+            const code = JSON.stringify(
+              { suggestions: createAutocompleteDefinitions(painlessClasses) },
+              null,
+              2
+            );
+            writeFileSync(filePath, code, { encoding: 'utf8' });
+          } catch (err) {
+            log.fail(err.message);
+          }
+        });
+
+      // Create index.ts file for autocomplete definitions
+      const indexFilePath = join(autocompleteOutputFolder, 'index.ts');
+      const indexCode = createAutocompleteExports();
+
+      writeFileSync(indexFilePath, indexCode, { encoding: 'utf8' });
+
+      log.succeed('Painless autocomplete definitions generated successfully');
+    }
+  );
+}

packages/kbn-monaco/scripts/utils/clone_es.js

@@ -0,0 +1,149 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+const { accessSync, mkdirSync } = require('fs');
+const { join } = require('path');
+const simpleGit = require('simple-git');
+
+// Note: The generated whitelists have not yet been merged to master
+// so this script may fail until code in this branch has been merged:
+// https://github.com/stu-elastic/elasticsearch/tree/scripting/whitelists
+const esRepo = 'https://github.com/elastic/elasticsearch.git';
+
+const esFolder = join(__dirname, '..', '..', 'elasticsearch');
+const esPainlessContextFolder = join(
+  esFolder,
+  'modules',
+  'lang-painless',
+  'src',
+  'main',
+  'generated'
+);
+
+/**
+ * Checks if the given path exists
+ * @param {string} path
+ * @returns {boolean} true if exists, false if not
+ */
+const pathExist = (path) => {
+  try {
+    accessSync(path);
+    return true;
+  } catch (err) {
+    return false;
+  }
+};
+
+/**
+ * Creates the given folder
+ * @param {string} name
+ * @returns {boolean} true on success, false on failure
+ */
+const createFolder = (name) => {
+  try {
+    mkdirSync(name);
+    return true;
+  } catch (err) {
+    return false;
+  }
+};
+
+/**
+ * Sets the Elasticsearch repository to the given branch or tag.
+ * If the repository is not present in `esFolder` it will
+ * clone the repository and the checkout the branch or tag.
+ * If the repository is already present but it cannot checkout to
+ * the given tag, it will perform a pull and then try again.
+ *
+ * This code was largely borrowed from the ES JS client:
+ * https://github.com/elastic/elasticsearch-js/blob/master/scripts/utils/clone-es.js
+ *
+ * @param {object} options
+ * @param {function} callback
+ */
+const cloneAndCheckout = (opts, callback) => {
+  const { log, tag, branch } = opts;
+
+  let fresh = false;
+  let retry = 0;
+
+  if (!pathExist(esFolder)) {
+    if (!createFolder(esFolder)) {
+      log.fail('Failed to create ES folder');
+      return;
+    }
+    fresh = true;
+  }
+
+  const git = simpleGit(esFolder);
+
+  const pull = (cb) => {
+    log.text = 'Pulling Elasticsearch repository';
+
+    git.pull((err) => {
+      if (err) {
+        callback(err, { esPainlessContextFolder });
+        return;
+      }
+      cb();
+    });
+  };
+
+  const clone = (cb) => {
+    log.text = 'Cloning Elasticsearch repository';
+
+    git.clone(esRepo, esFolder, (err) => {
+      if (err) {
+        callback(err, { esPainlessContextFolder });
+        return;
+      }
+      cb();
+    });
+  };
+
+  const checkout = (alsoPull = false) => {
+    if (branch) {
+      log.text = `Checking out branch '${branch}'`;
+    } else {
+      log.text = `Checking out tag '${tag}'`;
+    }
+
+    git.checkout(branch || tag, (err) => {
+      if (err) {
+        if (retry++ > 0) {
+          callback(new Error(`Cannot checkout '${branch || tag}'`), { esPainlessContextFolder });
+          return;
+        }
+        return pull(checkout);
+      }
+      if (alsoPull) {
+        return pull(checkout);
+      }
+      callback(null, { esPainlessContextFolder });
+    });
+  };
+
+  if (fresh) {
+    clone(checkout);
+  } else {
+    checkout(Boolean(opts.branch));
+  }
+};
+
+module.exports = cloneAndCheckout;