Initial commit

Co-Authored-By: Eric Tuvesson <eric.tuvesson@gmail.com>
Co-Authored-By: mikaeltellhed <2311083+mikaeltellhed@users.noreply.github.com>
Co-Authored-By: kotte <14197736+mrtamagotchi@users.noreply.github.com>
Co-Authored-By: Anders Larsson <64838990+anders-topp@users.noreply.github.com>
Co-Authored-By: Johan  <4934465+joolsus@users.noreply.github.com>
Co-Authored-By: Tore Knudsen <18231882+torekndsn@users.noreply.github.com>
Co-Authored-By: victoratndl <99176179+victoratndl@users.noreply.github.com>

packages/noodl-git/src/core/stash-files.ts

@@ -0,0 +1,59 @@
+import { git } from "./client";
+import { parseChangedFiles } from "./logs";
+import { CommittedFileChange } from "./models/status";
+
+/**
+ * Get the files that were changed in the given stash commit.
+ *
+ * This is different than `getChangedFiles` because stashes
+ * have _3 parents(!!!)_
+ */
+export async function getStashedFiles(
+  repositoryDir: string,
+  stashSha: string
+): Promise<ReadonlyArray<CommittedFileChange>> {
+  const [trackedFiles, untrackedFiles] = await Promise.all([
+    getChangedFilesWithinStash(repositoryDir, stashSha),
+    getChangedFilesWithinStash(repositoryDir, `${stashSha}^3`),
+  ]);
+
+  const files = new Map<string, CommittedFileChange>();
+  trackedFiles.forEach((x) => files.set(x.path, x));
+  untrackedFiles.forEach((x) => files.set(x.path, x));
+  return [...files.values()].sort((x, y) => x.path.localeCompare(y.path));
+}
+
+/**
+ * Same thing as `getChangedFiles` but with extra handling for 128 exit code
+ * (which happens if the commit's parent is not valid)
+ */
+async function getChangedFilesWithinStash(repositoryDir: string, sha: string) {
+  // opt-in for rename detection (-M) and copies detection (-C)
+  // this is equivalent to the user configuring 'diff.renames' to 'copies'
+  // NOTE: order here matters - doing -M before -C means copies aren't detected
+  const args = [
+    "log",
+    sha,
+    "-C",
+    "-M",
+    "-m",
+    "-1",
+    "--no-show-signature",
+    "--first-parent",
+    "--name-status",
+    "--format=format:",
+    "-z",
+    "--",
+  ];
+  const result = await git(args, repositoryDir, "getChangedFilesForStash", {
+    // if this fails, its most likely
+    // because there weren't any untracked files,
+    // and that's okay!
+    successExitCodes: new Set([0, 128]),
+  });
+
+  if (result.exitCode === 0 && result.output.toString().length > 0) {
+    return parseChangedFiles(result.output.toString(), sha);
+  }
+  return [];
+}