@naandalist/patch-package/dist/patch/reverse.js

Fix broken node modules with no fuss

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.reversePatch = void 0;
const parse_1 = require("./parse");
const assertNever_1 = require("../assertNever");
function reverseHunk(hunk) {
    const header = {
        original: hunk.header.patched,
        patched: hunk.header.original,
    };
    const parts = [];
    for (const part of hunk.parts) {
        switch (part.type) {
            case "context":
                parts.push(part);
                break;
            case "deletion":
                parts.push({
                    type: "insertion",
                    lines: part.lines,
                    noNewlineAtEndOfFile: part.noNewlineAtEndOfFile,
                });
                break;
            case "insertion":
                parts.push({
                    type: "deletion",
                    lines: part.lines,
                    noNewlineAtEndOfFile: part.noNewlineAtEndOfFile,
                });
                break;
            default:
                (0, assertNever_1.assertNever)(part.type);
        }
    }
    // swap insertions and deletions over so deletions always come first
    for (let i = 0; i < parts.length - 1; i++) {
        if (parts[i].type === "insertion" && parts[i + 1].type === "deletion") {
            const tmp = parts[i];
            parts[i] = parts[i + 1];
            parts[i + 1] = tmp;
            i += 1;
        }
    }
    const result = {
        header,
        parts,
        source: hunk.source,
    };
    (0, parse_1.verifyHunkIntegrity)(result);
    return result;
}
function reversePatchPart(part) {
    switch (part.type) {
        case "file creation":
            return {
                type: "file deletion",
                path: part.path,
                hash: part.hash,
                hunk: part.hunk && reverseHunk(part.hunk),
                mode: part.mode,
            };
        case "file deletion":
            return {
                type: "file creation",
                path: part.path,
                hunk: part.hunk && reverseHunk(part.hunk),
                mode: part.mode,
                hash: part.hash,
            };
        case "rename":
            return {
                type: "rename",
                fromPath: part.toPath,
                toPath: part.fromPath,
            };
        case "patch":
            return {
                type: "patch",
                path: part.path,
                hunks: part.hunks.map(reverseHunk),
                beforeHash: part.afterHash,
                afterHash: part.beforeHash,
            };
        case "mode change":
            return {
                type: "mode change",
                path: part.path,
                newMode: part.oldMode,
                oldMode: part.newMode,
            };
    }
}
const reversePatch = (patch) => {
    return patch.map(reversePatchPart).reverse();
};
exports.reversePatch = reversePatch;
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