feat(ci-new): add git-lock and git-unlock CI commands

Add temporary commit and restore commands to stabilize the workspace
during CI runs, with safety checks and error handling.

1 files changed, 60 insertions, 0 deletions

diff --git a/mingling_ci/src/cmd/cmd_git_lock.rs b/mingling_ci/src/cmd/cmd_git_lock.rs
new file mode 100644
index 0000000..4398593
--- /dev/null
+++ b/mingling_ci/src/cmd/cmd_git_lock.rs
@@ -0,0 +1,60 @@
+use mingling::{
+    Grouped, RenderResult, Routable,
+    macros::{buffer, command, r_println, renderer},
+    res::ResExitCode,
+};
+
+use crate::Next;
+use crate::git::{LOCK_FILE, TEMP_COMMIT_MESSAGE, run_git, worktree_clean};
+use crate::res::{CargoError, MessagePrinter};
+
+/// Temporarily commits the workspace so CI can run on a stable tree.
+///
+/// First pins the current HEAD to the `mingling/bkup` backup branch (created
+/// or force-reset), then commits everything with a `[DO NOT PUSH] CI TEMP`
+/// message. When the tree has no tracked changes, a `MINGLING-CI-CHECKING`
+/// marker file is created first so the commit is never empty.
+#[command(node = "git-lock")]
+pub fn git_lock() -> Next {
+    if let Err(e) = run_git(["branch", "-f", "mingling/bkup", "HEAD"]) {
+        return ErrorGitLock(e).to_chain();
+    }
+
+    if worktree_clean()
+        && let Err(e) = std::fs::write(LOCK_FILE, "")
+    {
+        return ErrorGitLock(format!("failed to create {LOCK_FILE}: {e}")).to_chain();
+    }
+
+    if let Err(e) = run_git(["add", "."]) {
+        return ErrorGitLock(e).to_chain();
+    }
+    if let Err(e) = run_git(["commit", "-m", TEMP_COMMIT_MESSAGE]) {
+        return ErrorGitLock(e).to_chain();
+    }
+
+    ResultGitLock {}.to_chain()
+}
+
+#[derive(Grouped)]
+pub struct ResultGitLock;
+
+#[derive(Grouped, Default)]
+pub struct ErrorGitLock(pub String);
+
+#[renderer(buffer)]
+pub fn render_git_lock(_: ResultGitLock) {
+    r_println!("Locked: CI temp commit created");
+}
+
+#[renderer]
+pub fn render_error_git_lock(
+    e: ErrorGitLock,
+    error: &CargoError,
+    exit_code: &mut ResExitCode,
+) -> RenderResult {
+    let render_result = RenderResult::new();
+    error.println(vec![format!("Git-Lock: {}", e.0)]);
+    exit_code.exit_code = 1;
+    render_result
+}