84 lines
2.1 KiB
TypeScript
84 lines
2.1 KiB
TypeScript
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import { editor, markdown, YAML } from "$sb/syscalls.ts";
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import { LintDiagnostic } from "$sb/types.ts";
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import {
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findNodeOfType,
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renderToText,
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traverseTreeAsync,
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} from "$sb/lib/tree.ts";
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export async function lintYAML(): Promise<LintDiagnostic[]> {
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const text = await editor.getText();
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const tree = await markdown.parseMarkdown(text);
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const diagnostics: LintDiagnostic[] = [];
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await traverseTreeAsync(tree, async (node) => {
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if (node.type === "FrontMatterCode") {
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const lintResult = await lintYaml(
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renderToText(node),
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node.from!,
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);
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if (lintResult) {
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diagnostics.push(lintResult);
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}
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return true;
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}
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if (node.type === "FencedCode") {
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const codeInfo = findNodeOfType(node, "CodeInfo")!;
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if (!codeInfo) {
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return true;
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}
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const codeLang = codeInfo.children![0].text!;
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// All known YAML formats
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if (
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codeLang === "template" || codeLang === "yaml" ||
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codeLang.startsWith("#")
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) {
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const codeText = findNodeOfType(node, "CodeText");
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if (!codeText) {
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return true;
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}
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const yamlCode = renderToText(codeText);
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const lintResult = await lintYaml(
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yamlCode,
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codeText.from!,
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);
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if (lintResult) {
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diagnostics.push(lintResult);
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}
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return true;
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}
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}
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return false;
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});
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return diagnostics;
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}
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const errorRegex = /at line (\d+),? column (\d+)/;
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async function lintYaml(
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yamlText: string,
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from: number,
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): Promise<LintDiagnostic | undefined> {
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try {
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await YAML.parse(yamlText);
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} catch (e) {
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const errorMatch = errorRegex.exec(e.message);
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if (errorMatch) {
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console.log("YAML error", e.message);
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const line = parseInt(errorMatch[1], 10) - 1;
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const yamlLines = yamlText.split("\n");
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let pos = from;
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for (let i = 0; i < line; i++) {
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pos += yamlLines[i].length + 1;
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}
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const endPos = pos + yamlLines[line]?.length || pos;
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return {
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from: pos,
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to: endPos,
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severity: "error",
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message: e.message,
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};
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}
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}
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}
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