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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /tools/lint/eslint/eslint-plugin-mozilla/lib/rules/reject-eager-module-in-lazy-getter.js | |
parent | Initial commit. (diff) | |
download | thunderbird-upstream.tar.xz thunderbird-upstream.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/lint/eslint/eslint-plugin-mozilla/lib/rules/reject-eager-module-in-lazy-getter.js')
-rw-r--r-- | tools/lint/eslint/eslint-plugin-mozilla/lib/rules/reject-eager-module-in-lazy-getter.js | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/reject-eager-module-in-lazy-getter.js b/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/reject-eager-module-in-lazy-getter.js new file mode 100644 index 0000000000..df397ad253 --- /dev/null +++ b/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/reject-eager-module-in-lazy-getter.js @@ -0,0 +1,103 @@ +/** + * @fileoverview Reject use of lazy getters for modules that's loaded early in + * the startup process and not necessarily be lazy. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ + +"use strict"; +const helpers = require("../helpers"); + +function isString(node) { + return node.type === "Literal" && typeof node.value === "string"; +} + +function isEagerModule(resourceURI) { + return [ + "resource://gre/modules/Services", + "resource://gre/modules/XPCOMUtils", + "resource://gre/modules/AppConstants", + ].includes(resourceURI.replace(/(\.jsm|\.jsm\.js|\.js|\.sys\.mjs)$/, "")); +} + +function checkEagerModule(context, node, resourceURI) { + if (!isEagerModule(resourceURI)) { + return; + } + context.report({ + node, + messageId: "eagerModule", + data: { uri: resourceURI }, + }); +} + +module.exports = { + meta: { + docs: { + url: "https://firefox-source-docs.mozilla.org/code-quality/lint/linters/eslint-plugin-mozilla/tools/lint/eslint/eslint-plugin-mozilla/lib/rules/reject-eager-module-in-lazy-getter.html", + }, + messages: { + eagerModule: + 'Module "{{uri}}" is known to be loaded early in the startup process, and should be loaded eagerly, instead of defining a lazy getter.', + }, + schema: [], + type: "problem", + }, + + create(context) { + return { + CallExpression(node) { + if (node.callee.type !== "MemberExpression") { + return; + } + + let callerSource; + try { + callerSource = helpers.getASTSource(node.callee); + } catch (e) { + return; + } + + if ( + callerSource === "XPCOMUtils.defineLazyModuleGetter" || + callerSource === "ChromeUtils.defineModuleGetter" + ) { + if (node.arguments.length < 3) { + return; + } + const resourceURINode = node.arguments[2]; + if (!isString(resourceURINode)) { + return; + } + checkEagerModule(context, node, resourceURINode.value); + } else if ( + callerSource === "XPCOMUtils.defineLazyModuleGetters" || + callerSource === "ChromeUtils.defineESModuleGetters" + ) { + if (node.arguments.length < 2) { + return; + } + const obj = node.arguments[1]; + if (obj.type !== "ObjectExpression") { + return; + } + for (let prop of obj.properties) { + if (prop.type !== "Property") { + continue; + } + if (prop.kind !== "init") { + continue; + } + const resourceURINode = prop.value; + if (!isString(resourceURINode)) { + continue; + } + checkEagerModule(context, node, resourceURINode.value); + } + } + }, + }; + }, +}; |