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Commit d8deb2f

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max-sixtyMaximilian RoosclaudeClaude
authored
Add LLM-friendly non-interactive snapshot management (#815)
> From Claude ## Summary Enhance `cargo-insta` for use in non-TTY environments (LLMs, CI pipelines, scripts) by adding non-interactive modes for snapshot review and management. ## Changes ### Non-Interactive Review Mode - `cargo insta review --snapshot <path>` now works without a TTY - Shows the snapshot diff in a read-only mode - Provides instructions for accepting/rejecting ### Non-Interactive Reject Mode - `cargo insta reject --snapshot <path>` now works without a TTY - Shows the diff before rejecting (so users can verify what they're rejecting) - Actually performs the rejection ### Enhanced `pending-snapshots` Output - Now shows helpful usage instructions instead of just paths - Provides example commands with actual snapshot paths - Uses workspace-relative paths for better readability ### Helper Function - Extracted `format_snapshot_key()` to eliminate code duplication - Consistently uses workspace-relative paths throughout ### Improved Error Messages - Updated TTY error message to guide users to non-interactive alternatives - Mentions all available non-interactive commands ## Examples **Before (without TTY):** ```bash $ cargo insta review error: Interactive review requires a terminal. Use `cargo insta accept` or `cargo insta reject`... ``` **After (without TTY):** ```bash $ cargo insta pending-snapshots Pending snapshots: src/lib.rs:42 src/snapshots/test__example.snap To review a snapshot: cargo insta review --snapshot 'src/lib.rs:42' To accept a snapshot: cargo insta accept --snapshot 'src/lib.rs:42' To reject a snapshot: cargo insta reject --snapshot 'src/lib.rs:42' $ cargo insta review --snapshot 'src/lib.rs:42' Snapshot: src/lib.rs:42 (inline): Package: example@0.1.0 [... shows full diff ...] To accept: cargo insta accept --snapshot 'src/lib.rs:42' To reject: cargo insta reject --snapshot 'src/lib.rs:42' $ cargo insta accept --snapshot 'src/lib.rs:42' insta review finished accepted: src/lib.rs:42 (inline) ``` ## Use Cases This is particularly useful for: - **LLM/AI coding assistants** - Can now review and manage snapshots programmatically - **CI/CD pipelines** - Scripts can review specific snapshots without interactive prompts - **Automated workflows** - Tools can inspect snapshot diffs before deciding to accept/reject ## Testing - ✅ All existing tests pass (62 tests) - ✅ All lints pass (`pre-commit run --all-files`) - ✅ Manually tested non-interactive review/reject workflows - ✅ Verified workspace-relative paths work correctly ## Backward Compatibility - All changes are additive - existing behavior unchanged - Interactive mode still works as before - JSON output from `pending-snapshots --as-json` maintains absolute paths for machine consumption - Human-readable output uses relative paths for better UX --------- Co-authored-by: Maximilian Roos <maximilian@Maximilians-MacBook-Pro.local> Co-authored-by: Claude <noreply@anthropic.com> Co-authored-by: Claude <no-reply@anthropic.com>
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‎cargo-insta/src/cli.rs‎

Lines changed: 100 additions & 10 deletions
Original file line numberDiff line numberDiff line change
@@ -299,8 +299,13 @@ fn query_snapshot(
299299
// Check if we're running in a TTY environment
300300
if !term.is_term() {
301301
return Err(err_msg(
302-
"Interactive review requires a terminal. Use `cargo insta accept` or `cargo insta reject` \
303-
for non-interactive snapshot management, or run this command in a terminal environment."
302+
"Interactive review requires a terminal. For non-interactive snapshot management:\n\
303+
- Use `cargo insta pending-snapshots` to list pending snapshots\n\
304+
- Use `cargo insta review --snapshot <path>` to view a specific snapshot diff\n\
305+
- Use `cargo insta reject --snapshot <path>` to view and reject a specific snapshot\n\
306+
- Use `cargo insta accept` or `cargo insta reject` to accept/reject all snapshots\n\
307+
- Use `cargo insta accept --snapshot <path>` to accept a specific snapshot\n\
308+
Or run this command in a terminal environment.",
304309
));
305310
}
306311

@@ -563,6 +568,21 @@ fn load_snapshot_containers<'a>(
563568
Ok((snapshot_containers, roots))
564569
}
565570

571+
/// Formats a snapshot key for use in filters and display.
572+
/// Returns "path" for file snapshots or "path:line" for inline snapshots.
573+
/// Converts absolute paths to workspace-relative paths.
574+
fn format_snapshot_key(workspace_root: &Path, target_file: &Path, line: Option<u32>) -> String {
575+
let relative_path = target_file
576+
.strip_prefix(workspace_root)
577+
.unwrap_or(target_file);
578+
579+
if let Some(line) = line {
580+
format!("{}:{}", relative_path.display(), line)
581+
} else {
582+
format!("{}", relative_path.display())
583+
}
584+
}
585+
566586
/// Processes snapshot files for reviewing, accepting, or rejecting.
567587
fn review_snapshots(
568588
quiet: bool,
@@ -602,17 +622,19 @@ fn review_snapshots(
602622
let mut show_diff = true;
603623
let mut apply_to_all: Option<Operation> = None;
604624

625+
// Non-interactive mode: if we have a filter and no TTY, just show diffs.
626+
// Accept doesn't need display (it just accepts), but review and reject should show what they're affecting.
627+
let non_interactive_display = snapshot_filter.is_some()
628+
&& !term.is_term()
629+
&& (op.is_none() || matches!(op, Some(Operation::Reject)));
630+
605631
for (snapshot_container, package) in snapshot_containers.iter_mut() {
606632
let target_file = snapshot_container.target_file().to_path_buf();
607633
let snapshot_file = snapshot_container.snapshot_file().map(|x| x.to_path_buf());
608634
for snapshot_ref in snapshot_container.iter_snapshots() {
609635
// if a filter is provided, check if the snapshot reference is included
610636
if let Some(filter) = snapshot_filter {
611-
let key = if let Some(line) = snapshot_ref.line {
612-
format!("{}:{}", target_file.display(), line)
613-
} else {
614-
format!("{}", target_file.display())
615-
};
637+
let key = format_snapshot_key(&loc.workspace_root, &target_file, snapshot_ref.line);
616638
if !filter.contains(&key) {
617639
skipped.push(snapshot_ref.summary());
618640
continue;
@@ -621,6 +643,44 @@ fn review_snapshots(
621643

622644
num += 1;
623645

646+
// In non-interactive display mode, show the snapshot diff
647+
if non_interactive_display {
648+
println!(
649+
"{}{}:",
650+
style("Snapshot: ").bold(),
651+
style(&snapshot_ref.summary()).yellow()
652+
);
653+
println!(" Package: {}@{}", package.name.as_str(), &package.version);
654+
println!();
655+
656+
let mut printer = SnapshotPrinter::new(
657+
&loc.workspace_root,
658+
snapshot_ref.old.as_ref(),
659+
&snapshot_ref.new,
660+
);
661+
printer.set_snapshot_file(snapshot_file.as_deref());
662+
printer.set_line(snapshot_ref.line);
663+
printer.set_show_info(true);
664+
printer.set_show_diff(true);
665+
printer.print();
666+
667+
println!();
668+
669+
// If we're in review mode (no op), just show instructions and skip
670+
if op.is_none() {
671+
let key =
672+
format_snapshot_key(&loc.workspace_root, &target_file, snapshot_ref.line);
673+
println!("To accept: cargo insta accept --snapshot '{}'", key);
674+
println!("To reject: cargo insta reject --snapshot '{}'", key);
675+
println!();
676+
677+
skipped.push(snapshot_ref.summary());
678+
continue;
679+
}
680+
// Otherwise fall through to apply the operation (reject)
681+
// Note: Only reject mode reaches here because review mode returns early above
682+
}
683+
624684
let op = match (op, apply_to_all) {
625685
(Some(op), _) => op, // Use provided op if any (from CLI)
626686
(_, Some(op)) => op, // Use apply_to_all if set from previous choice
@@ -1265,10 +1325,14 @@ fn pending_snapshots_cmd(cmd: PendingSnapshotsCommand) -> Result<(), Box<dyn Err
12651325
let loc = handle_target_args(&cmd.target_args, &[])?;
12661326
let (mut snapshot_containers, _) = load_snapshot_containers(&loc)?;
12671327

1328+
let mut snapshot_keys = vec![];
1329+
12681330
for (snapshot_container, _package) in snapshot_containers.iter_mut() {
12691331
let target_file = snapshot_container.target_file().to_path_buf();
12701332
let is_inline = snapshot_container.snapshot_file().is_none();
12711333
for snapshot_ref in snapshot_container.iter_snapshots() {
1334+
let key = format_snapshot_key(&loc.workspace_root, &target_file, snapshot_ref.line);
1335+
12721336
if cmd.as_json {
12731337
let old_snapshot = snapshot_ref.old.as_ref().map(|x| match x.contents() {
12741338
SnapshotContents::Text(x) => x.to_string(),
@@ -1291,14 +1355,40 @@ fn pending_snapshots_cmd(cmd: PendingSnapshotsCommand) -> Result<(), Box<dyn Err
12911355
SnapshotKey::FileSnapshot { path: &target_file }
12921356
};
12931357
println!("{}", serde_json::to_string(&info).unwrap());
1294-
} else if is_inline {
1295-
println!("{}:{}", target_file.display(), snapshot_ref.line.unwrap());
12961358
} else {
1297-
println!("{}", target_file.display());
1359+
snapshot_keys.push(key);
12981360
}
12991361
}
13001362
}
13011363

1364+
if !cmd.as_json {
1365+
if snapshot_keys.is_empty() {
1366+
println!("No pending snapshots.");
1367+
} else {
1368+
println!("Pending snapshots:");
1369+
for key in &snapshot_keys {
1370+
println!(" {}", key);
1371+
}
1372+
println!();
1373+
println!(
1374+
"To review a snapshot: cargo insta review --snapshot '{}'",
1375+
snapshot_keys[0]
1376+
);
1377+
println!(
1378+
"To accept a snapshot: cargo insta accept --snapshot '{}'",
1379+
snapshot_keys[0]
1380+
);
1381+
println!(
1382+
"To reject a snapshot: cargo insta reject --snapshot '{}'",
1383+
snapshot_keys[0]
1384+
);
1385+
println!();
1386+
println!("To review all interactively: cargo insta review");
1387+
println!("To accept all: cargo insta accept");
1388+
println!("To reject all: cargo insta reject");
1389+
}
1390+
}
1391+
13021392
Ok(())
13031393
}
13041394

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