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| 1 | +import Limits from '../../limits' |
| 2 | +import Argv from '../argv' |
| 3 | +import { EMPTY_FILE_HUNKS } from '../empty-file-hunks' |
| 4 | +import Parse from '../parse' |
| 5 | +import type Types from '../types' |
| 6 | +import { isLastOfDiff } from './is-last-of-diff' |
| 7 | +import { withClosingLine } from './with-closing-line' |
| 8 | + |
| 9 | +/** |
| 10 | + * The rows' hunks against the base their counts were read against, from one |
| 11 | + * git child over their literal paths; each but the last, a closing empty row. |
| 12 | + * |
| 13 | + * A row with no body (untracked, binary, renamed, or staged then edited on |
| 14 | + * an unborn HEAD) is never named to git. Paths past MAX_PATHSPEC_CHARS and |
| 15 | + * files a cut answer left unread go to a further child. |
| 16 | + * |
| 17 | + * @param run runs git against the pinned repository |
| 18 | + * @param data the fetch the rows belong to |
| 19 | + * @param files the rows |
| 20 | + * @returns each row's parsed body by path, null where git failed |
| 21 | + */ |
| 22 | +export async function fetchHunks( |
| 23 | + run: Types.GitRun, |
| 24 | + data: Types.DiffData, |
| 25 | + files: readonly Types.FileStat[], |
| 26 | +): Promise<ReadonlyMap<string, Types.FileHunks | null>> { |
| 27 | + const bodied = files.filter( |
| 28 | + file => |
| 29 | + !file.isUntracked && |
| 30 | + !file.isBinary && |
| 31 | + file.renamedFrom === null && |
| 32 | + !data.stalePaths.includes(file.path), |
| 33 | + ) |
| 34 | + |
| 35 | + const bodiless = files |
| 36 | + .filter(file => !bodied.includes(file)) |
| 37 | + .map(file => [file.path, EMPTY_FILE_HUNKS] as const) |
| 38 | + |
| 39 | + if (bodied.length === 0) { |
| 40 | + return new Map(bodiless) |
| 41 | + } |
| 42 | + |
| 43 | + let spent = 0 |
| 44 | + |
| 45 | + const asked = bodied |
| 46 | + .map(file => file.path) |
| 47 | + .filter((path, at) => { |
| 48 | + spent += path.length |
| 49 | + |
| 50 | + return at === 0 || spent <= Limits.MAX_PATHSPEC_CHARS |
| 51 | + }) |
| 52 | + |
| 53 | + const { exitCode, stdout } = await run([ |
| 54 | + '--literal-pathspecs', |
| 55 | + ...Argv.DIFF_LEADING_ARGS, |
| 56 | + ...Argv.HUNKS_ARGS, |
| 57 | + data.baseRef, |
| 58 | + '--', |
| 59 | + ...asked, |
| 60 | + ]) |
| 61 | + |
| 62 | + const hasAnswered = exitCode === 0 |
| 63 | + |
| 64 | + const settled = hasAnswered |
| 65 | + ? Parse.parseFileDiffs(stdout, asked) |
| 66 | + : new Map<string, Types.FileHunks>() |
| 67 | + |
| 68 | + const waiting = bodied.filter(file => !settled.has(file.path)) |
| 69 | + const isStuck = settled.size === 0 |
| 70 | + |
| 71 | + const rest = isStuck |
| 72 | + ? waiting.map(file => [file.path, null] as const) |
| 73 | + : await fetchHunks(run, data, waiting) |
| 74 | + |
| 75 | + return new Map<string, Types.FileHunks | null>([ |
| 76 | + ...bodiless, |
| 77 | + ...bodied.flatMap(file => { |
| 78 | + const body = settled.get(file.path) |
| 79 | + const isLast = isLastOfDiff(data, file) |
| 80 | + |
| 81 | + return body |
| 82 | + ? [[file.path, isLast ? body : withClosingLine(body)] as const] |
| 83 | + : [] |
| 84 | + }), |
| 85 | + ...rest, |
| 86 | + ]) |
| 87 | +} |
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