Fix gh-pages publish leaving stale worktrees on commit failure (#14046) (#14048)

Validate git user identity (name/email) before creating the publish
worktree, and use `--force` on worktree removal to handle dirty state.

Also checks GIT_AUTHOR_*/GIT_COMMITTER_* environment variables as
fallback, matching git's own identity resolution behavior.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: cderv

news/changelog-1.9.md

@@ -137,6 +137,10 @@ All changes included in 1.9:
 
 - ([#13414](https://github.com/quarto-dev/quarto-cli/issues/13414)): Be more forgiving when Confluence server returns malformed JSON response. (author: @m1no)
 
+### `gh-pages`
+
+- ([#14046](https://github.com/quarto-dev/quarto-cli/issues/14046)): Fix `quarto publish gh-pages` leaving stale worktrees when `git commit` fails due to missing `user.name`/`user.email` configuration. Git identity is now validated before worktree creation, and worktree cleanup uses `--force` to handle modified/untracked files.
+
 ## Lua API
 
 - ([#13762](https://github.com/quarto-dev/quarto-cli/issues/13762)): Add `quarto.paths.typst()` to Quarto's Lua API to resolve Typst binary path in Lua filters and extensions consistently with Quarto itself. (author: @mcanouil)

src/core/git.ts

@@ -87,6 +87,35 @@ export async function gitBranchExists(
   return Promise.resolve(undefined);
 }
 
+export async function gitUserIdentityConfigured(
+  dir: string,
+): Promise<boolean> {
+  const name = await execProcess({
+    cmd: "git",
+    args: ["config", "user.name"],
+    cwd: dir,
+    stdout: "piped",
+    stderr: "piped",
+  });
+  const email = await execProcess({
+    cmd: "git",
+    args: ["config", "user.email"],
+    cwd: dir,
+    stdout: "piped",
+    stderr: "piped",
+  });
+
+  const hasName = (name.success && (name.stdout?.trim().length ?? 0) > 0) ||
+    (Deno.env.get("GIT_AUTHOR_NAME")?.trim().length ?? 0) > 0 ||
+    (Deno.env.get("GIT_COMMITTER_NAME")?.trim().length ?? 0) > 0;
+
+  const hasEmail = (email.success && (email.stdout?.trim().length ?? 0) > 0) ||
+    (Deno.env.get("GIT_AUTHOR_EMAIL")?.trim().length ?? 0) > 0 ||
+    (Deno.env.get("GIT_COMMITTER_EMAIL")?.trim().length ?? 0) > 0;
+
+  return hasName && hasEmail;
+}
+
 export async function gitCmdOutput(
   dir: string,
   args: string[],

src/publish/gh-pages/gh-pages.ts

@@ -27,12 +27,18 @@ import { joinUrl } from "../../core/url.ts";
 import { completeMessage, withSpinner } from "../../core/console.ts";
 import { renderForPublish } from "../common/publish.ts";
 import { RenderFlags } from "../../command/render/types.ts";
-import { gitBranchExists, gitCmds, gitVersion } from "../../core/git.ts";
+import {
+  gitBranchExists,
+  gitCmds,
+  gitUserIdentityConfigured,
+  gitVersion,
+} from "../../core/git.ts";
 import {
   anonymousAccount,
   gitHubContextForPublish,
   verifyContext,
 } from "../common/git.ts";
+import { throwUnableToPublish } from "../common/errors.ts";
 import { createTempContext } from "../../core/temp.ts";
 import { projectScratchPath } from "../../project/project-scratch.ts";
 
@@ -116,6 +122,16 @@ async function publish(
   const ghContext = await gitHubContextForPublish(options.input);
   verifyContext(ghContext, "GitHub Pages");
 
+  // verify git user identity is configured (needed for commits in worktree)
+  if (!await gitUserIdentityConfigured(input)) {
+    throwUnableToPublish(
+      "git user.name and/or user.email is not configured\n" +
+        "(run 'git config user.name \"Your Name\"' and " +
+        "'git config user.email \"you@example.com\"' to set them)",
+      "GitHub Pages",
+    );
+  }
+
   // create gh pages branch on remote and local if there is none yet
   const createGhPagesBranchRemote = !ghContext.ghPagesRemote;
   const createGhPagesBranchLocal = !ghContext.ghPagesLocal;
@@ -211,7 +227,7 @@ async function publish(
       const worktreePath = join(projectScratchPath(input), entry.name);
       await execProcess({
         cmd: "git",
-        args: ["worktree", "remove", worktreePath],
+        args: ["worktree", "remove", "--force", worktreePath],
         cwd: projectScratchPath(input),
       });
       removeIfExists(worktreePath);
@@ -423,7 +439,7 @@ async function withWorktree(
   } finally {
     await execProcess({
       cmd: "git",
-      args: ["worktree", "remove", siteDir],
+      args: ["worktree", "remove", "--force", siteDir],
       cwd: dir,
     });
   }