| 1 | export interface TurnDiffFileSummary { |
| 2 | readonly path: string; |
| 3 | readonly previousPath?: string; |
| 4 | readonly additions: number; |
| 5 | readonly deletions: number; |
| 6 | } |
| 7 | |
| 8 | /** Reads Git's NUL-delimited numstat output without decoding display paths. */ |
| 9 | export function parseTurnDiffFilesFromNumstat(numstat: string): ReadonlyArray<TurnDiffFileSummary> { |
| 10 | const records = numstat.split("\0"); |
| 11 | const files: TurnDiffFileSummary[] = []; |
| 12 | |
| 13 | for (let index = 0; index < records.length; index += 1) { |
| 14 | const record = records[index]!; |
| 15 | const counts = /^(\d+|-)\t(\d+|-)\t/.exec(record); |
| 16 | if (!counts) continue; |
| 17 | |
| 18 | let path = record.slice(counts[0].length); |
| 19 | let previousPath: string | undefined; |
| 20 | if (path.length === 0) { |
| 21 | // Renames and copies use two more records: the source and destination. |
| 22 | previousPath = records[index + 1]; |
| 23 | path = records[index + 2] ?? ""; |
| 24 | index += 2; |
| 25 | } |
| 26 | if (path.length === 0) continue; |
| 27 | |
| 28 | files.push({ |
| 29 | path, |
| 30 | ...(previousPath === undefined ? {} : { previousPath }), |
| 31 | additions: counts[1] === "-" ? 0 : Number(counts[1]), |
| 32 | deletions: counts[2] === "-" ? 0 : Number(counts[2]), |
| 33 | }); |
| 34 | } |
| 35 | |
| 36 | return files.toSorted((left, right) => left.path.localeCompare(right.path)); |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * True when Git brought this file in and no work in the range touched it. |
| 41 | * `authoredPaths` comes from `CheckpointStore.listAuthoredPaths`; null means nothing was imported. |
| 42 | * A rename stays visible when either side was authored, because the summary shows it as one file. |
| 43 | */ |
| 44 | export function isGitImport( |
| 45 | file: TurnDiffFileSummary, |
| 46 | authoredPaths: ReadonlySet<string> | null, |
| 47 | ): boolean { |
| 48 | return ( |
| 49 | authoredPaths !== null && |
| 50 | !authoredPaths.has(file.path) && |
| 51 | (file.previousPath === undefined || !authoredPaths.has(file.previousPath)) |
| 52 | ); |
| 53 | } |