Bohdan Triapitsyn
d8f0ef074b
Uses hunk contents to find the first modified line instead of the hunk start Handles added, removed, and binary-only patches more accurately Adds tests for patch parsing edge cases
37 lines
801 B
TypeScript
37 lines
801 B
TypeScript
export const getFirstChangedModifiedLineFromPatch = (patch: string): number | null => {
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if (!patch) {
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return null;
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}
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const lines = patch.split('\n');
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let modifiedLine: number | null = null;
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for (const line of lines) {
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const hunkMatch = line.match(/^@@\s*-\d+(?:,\d+)?\s+\+(\d+)(?:,\d+)?\s*@@/);
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if (hunkMatch) {
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const parsed = Number.parseInt(hunkMatch[1] ?? '', 10);
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modifiedLine = Number.isFinite(parsed) && parsed >= 1 ? parsed : null;
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continue;
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}
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if (modifiedLine === null) {
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continue;
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}
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if (line.startsWith(' ')) {
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modifiedLine += 1;
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continue;
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}
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if (line.startsWith('+')) {
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return modifiedLine;
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}
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if (line.startsWith('-')) {
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return Math.max(1, modifiedLine);
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}
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}
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return null;
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};
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