wehub-resource-sync
40 lines
1.2 KiB
TypeScript
40 lines
1.2 KiB
TypeScript
import type { RenderResult, CommandDetectionResult } from "./types.ts";
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import { NO_RENDER } from "./types.ts";
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/**
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* RTK semantic renderer for `git diff` / `git show` output.
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*
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* Keeps only:
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* - `diff --git a/... b/...` file header lines
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* - `@@ ... @@` hunk headers
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* - change lines starting with `+` or `-` (but NOT `+++`/`---`)
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*
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* Everything else (context lines, index lines, mode lines, etc.) is dropped.
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* If no hunk header is found, returns no-op (input is not a real diff).
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*/
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export function renderGitDiff(text: string, _detection: CommandDetectionResult): RenderResult {
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// Guard: must have at least one hunk header
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if (!text.includes("@@ ")) {
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return NO_RENDER(text);
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}
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const kept: string[] = [];
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for (const line of text.split("\n")) {
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if (
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line.startsWith("diff --git ") ||
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line.startsWith("@@ ")
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) {
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kept.push(line);
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} else if (/^[+-](?![+-])/.test(line)) {
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// change line (+foo or -foo) but NOT +++ or ---
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kept.push(line);
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}
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// drop: context lines (space), index lines, --- a/, +++ b/, mode lines, etc.
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}
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const out = kept.join("\n");
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if (out === text) return NO_RENDER(text);
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return { text: out, changed: true, renderer: "git-diff" };
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}
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