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feat(pi-shell/minimizer): implemented length threshold and empty preservation

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- Add minimum character threshold to bypass minimization for short outputs.
- Add preserve-if-empty configuration and pipeline support for filters.
- Update test fixtures and integration tests to meet length thresholds.
This commit is contained in:
can1357
2026-08-08 16:27:03 +02:00
parent a30cbbb75d
commit 731c051733
8 changed files with 252 additions and 157 deletions
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crates/pi-shell/src/minimizer.rs
+1 -1
View File
@@ -46,7 +46,7 @@ pub struct MinimizerOutput {
/// Label for the dispatch path that produced this output (e.g. `"git"`,
/// `"pipeline:gradle"`, or `"passthrough"`). For non-rewrite misses, this
/// carries the reason label (e.g. `"compound"`, `"piped"`, `"parse-error"`,
/// `"too-large"`, `"disabled"`, `"unknown"`, `"unsupported"`,
/// `"too-short"`, `"too-large"`, `"disabled"`, `"unknown"`, `"unsupported"`,
/// `"pipeline-noop"`).
pub filter: &'static str,
/// Original (un-minimized) capture, surfaced only when the filter
crates/pi-shell/src/minimizer/defs/rustc.toml
+13 -5
View File
@@ -10,17 +10,20 @@
# The intervening snippet/caret/label lines (` |`, ` 3 | …`, ` = note:`) are
# dropped: they are recoverable context, not signal, and the kept `-->` pointer
# already localizes the diagnostic.
# Query/help output is not a diagnostic stream. Preserve it when no diagnostic
# line matches, rather than letting the engine turn the meaningful response into
# a generic success sentinel.
#
# DELIBERATELY no on_empty: the on_empty stage is NOT exit-gated
# (pipeline.rs:330-335), so a failed compile whose error text happened to miss
# the keep-set would otherwise collapse to a fake "rustc: ok". The engine's
# ensure_success_visible prints "OK" only on exit 0, which is the correct,
# exit-gated success sentinel.
# DELIBERATELY no on_empty: that stage is not exit-gated, so a failed compile
# whose error text happened to miss the keep-set would otherwise collapse to a
# fake "rustc: ok". The engine's ensure_success_visible prints "OK" only on
# exit 0, which is the correct, exit-gated success sentinel.
[filters.rustc]
description = "Compact rustc output — keep diagnostics, ICE/panic, and failure trailers"
match_command = "^rustc$"
strip_ansi = true
preserve_if_empty = true
keep_lines_matching = [
"^error",
"^warning",
@@ -85,3 +88,8 @@ warning: unused variable: `x`
warning: 1 warning emitted
"""
expected = "warning: unused variable: `x`\n --> src/lib.rs:2:9\nwarning: 1 warning emitted\n"
[[tests.rustc]]
name = "query output is preserved instead of collapsed to ok"
input = "/opt/rust/lib/rustlib\n"
expected = "/opt/rust/lib/rustlib\n"
crates/pi-shell/src/minimizer/engine.rs
+117 -53
View File
@@ -13,6 +13,11 @@ use crate::minimizer::{
pipeline::{self, CompiledPipeline, PipelineRegistry},
plan,
};
/// Captured outputs shorter than this are returned verbatim without filtering.
pub const MIN_MINIMIZE_CHARS: usize = 1_000;
fn is_below_minimize_threshold(captured: &str) -> bool {
captured.chars().take(MIN_MINIMIZE_CHARS).count() < MIN_MINIMIZE_CHARS
}
/// Minimization strategy for a shell command.
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
@@ -305,6 +310,9 @@ fn apply_identity(
let subcommand = identity.subcommand.as_deref();
if filters::supports(&identity.program, subcommand) {
if is_below_minimize_threshold(captured) {
return MinimizerOutput::passthrough(captured).labeled("too-short");
}
let ctx = MinimizerCtx { program: &identity.program, subcommand, command, config };
let Ok(rust_output) =
catch_unwind(AssertUnwindSafe(|| filters::filter(&ctx, captured, exit_code)))
@@ -329,6 +337,9 @@ fn apply_identity(
if pipeline.skipped_by_exit(exit_code) {
return MinimizerOutput::passthrough(captured).labeled("exit-skip");
}
if is_below_minimize_threshold(captured) {
return MinimizerOutput::passthrough(captured).labeled("too-short");
}
let text = catch_unwind(AssertUnwindSafe(|| pipeline.apply(captured).into_owned()))
.unwrap_or_else(|_| captured.to_string());
if text == captured {
@@ -525,6 +536,15 @@ pub fn verify_builtin_filters() -> Vec<pipeline::TestOutcome> {
pipeline::run_tests(builtin_pipelines())
}
#[cfg(test)]
fn minimizable_input(input: &str) -> String {
let mut output = input.to_string();
while output.chars().count() < MIN_MINIMIZE_CHARS {
output.push('\n');
}
output
}
#[cfg(test)]
mod tests {
use std::{
@@ -550,6 +570,29 @@ mod tests {
let _ = fs::remove_file(path);
cfg
}
#[test]
fn output_below_minimum_is_not_minimized() {
let cfg = config_from_settings(
r#"
schema_version = 1
[filters.printf]
match_command = "^printf$"
replace = [{ pattern = "x", replacement = "y" }]
"#,
);
let short = "x".repeat(MIN_MINIMIZE_CHARS - 1);
let exact = "x".repeat(MIN_MINIMIZE_CHARS);
let short_result = apply("printf", &short, 0, &cfg);
assert_eq!(short_result.text, short);
assert!(!short_result.changed);
assert_eq!(short_result.filter, "too-short");
let exact_result = apply("printf", &exact, 0, &cfg);
assert!(exact_result.changed);
assert_ne!(exact_result.text, exact);
}
#[test]
fn disabled_config_does_not_minimize() {
let cfg = MinimizerConfig::default();
@@ -594,16 +637,17 @@ on_empty = "OVERLAY"
only_on_exit = [0]
"#,
);
let diff_input = "diff --git a/file.rs b/file.rs\n@@\n-old\n+new\n";
let diff = apply("git diff", diff_input, 0, &cfg);
let diff_input = minimizable_input("diff --git a/file.rs b/file.rs\n@@\n-old\n+new\n");
let diff = apply("git diff", &diff_input, 0, &cfg);
assert_eq!(diff.filter, "pipeline+builtin");
assert_eq!(diff.text, "OVERLAY");
let status = apply("git status", "## main\n M file.rs\n", 0, &cfg);
let status_input = minimizable_input("## main\n M file.rs\n");
let status = apply("git status", &status_input, 0, &cfg);
assert_ne!(status.filter, "pipeline+builtin");
assert!(status.text.contains("unstaged 1"));
let failed = apply("git diff", diff_input, 1, &cfg);
let failed = apply("git diff", &diff_input, 1, &cfg);
assert_ne!(failed.filter, "pipeline+builtin");
assert!(failed.text.contains("file changed"));
}
@@ -620,9 +664,11 @@ only_on_exit = [0]
// and strip the NX banner; the bare npx def must not claim subcommand
// `nx`.
let cfg = MinimizerConfig { enabled: true, ..Default::default() };
let input = "\n > NX Running target build for 3 projects\n\n> nx run app:build\nError: \
build failed\n\n > NX Ran target build for 3 projects (2s)\n";
let out = apply("npx nx build", input, 0, &cfg);
let input = minimizable_input(
"\n > NX Running target build for 3 projects\n\n> nx run app:build\nError: build \
failed\n\n > NX Ran target build for 3 projects (2s)\n",
);
let out = apply("npx nx build", &input, 0, &cfg);
assert!(
!out.text.contains("NX Running target"),
"npx def shadowed nx-wrapped; NX banner survived: {:?}",
@@ -662,9 +708,11 @@ only_on_exit = [0]
// for genuinely UNKNOWN tools (its whole purpose). cowsay is not routed
// or owned by any other def, so the npx pipeline claims it.
let cfg = MinimizerConfig { enabled: true, ..Default::default() };
let input = "Need to install the following packages:\ncowsay@1.6.0\nOk to proceed? \
(y)\n\nnpm warn deprecated foo@1.0.0: use bar instead\n< Hello >\n";
let out = apply("npx cowsay hello", input, 0, &cfg);
let input = minimizable_input(
"Need to install the following packages:\ncowsay@1.6.0\nOk to proceed? (y)\n\nnpm warn \
deprecated foo@1.0.0: use bar instead\n< Hello >\n",
);
let out = apply("npx cowsay hello", &input, 0, &cfg);
assert!(out.changed);
assert!(!out.text.contains("Need to install"));
assert!(!out.text.contains("Ok to proceed"));
@@ -676,7 +724,8 @@ only_on_exit = [0]
fn enabled_known_filter_minimizes() {
let cfg = MinimizerConfig { enabled: true, ..Default::default() };
assert!(should_minimize("git diff", &cfg));
let out = apply("git diff", "diff --git a/file.rs b/file.rs\n@@\n-old\n+new\n", 0, &cfg);
let input = minimizable_input("diff --git a/file.rs b/file.rs\n@@\n-old\n+new\n");
let out = apply("git diff", &input, 0, &cfg);
assert!(out.changed);
assert!(out.text.contains("file changed"));
}
@@ -685,8 +734,8 @@ only_on_exit = [0]
fn enabled_config_minimizes_git_status() {
let cfg = MinimizerConfig { enabled: true, ..Default::default() };
assert!(should_minimize("git status", &cfg));
let input = "## main\n M file.rs\n";
let out = apply("git status", input, 0, &cfg);
let input = minimizable_input("## main\n M file.rs\n");
let out = apply("git status", &input, 0, &cfg);
assert!(out.changed);
assert!(out.text.contains("unstaged 1"));
assert_eq!(out.filter, "git");
@@ -695,13 +744,11 @@ only_on_exit = [0]
#[test]
fn successful_minimization_keeps_visible_ok_when_filter_removes_all_lines() {
let cfg = MinimizerConfig { enabled: true, ..Default::default() };
let out = apply(
"cargo build",
" Compiling app v0.1.0\n Finished `dev` profile [unoptimized + debuginfo] target(s) \
in 1.23s\n",
0,
&cfg,
let input = format!(
"{} Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.23s\n",
" Compiling app v0.1.0\n".repeat(200),
);
let out = apply("cargo build", &input, 0, &cfg);
assert!(out.changed);
assert_eq!(out.text, "OK\n");
@@ -709,6 +756,16 @@ only_on_exit = [0]
assert!(out.original_text.is_some());
}
#[test]
fn rustc_query_output_is_not_collapsed_to_ok() {
let cfg = MinimizerConfig { enabled: true, ..Default::default() };
let input = "/opt/rust/lib/rustlib\n";
let out = apply("rustc --print sysroot", input, 0, &cfg);
assert_eq!(out.text, input);
assert!(!out.changed);
}
#[test]
fn successful_user_pipeline_empty_output_returns_visible_ok() {
let cfg = config_from_settings(
@@ -720,20 +777,21 @@ strip_lines_matching = [".*"]
"#,
);
assert!(should_minimize("printf done", &cfg));
let out = apply("printf done", "drop me\n", 0, &cfg);
let input = minimizable_input("drop me\n");
let out = apply("printf done", &input, 0, &cfg);
assert!(out.changed);
assert_eq!(out.text, "OK\n");
assert_eq!(out.filter, "pipeline");
assert_eq!(out.output_bytes, out.text.len());
assert_eq!(out.original_text.as_deref(), Some("drop me\n"));
assert_eq!(out.original_text.as_deref(), Some(input.as_str()));
}
#[test]
fn failed_minimization_does_not_invent_ok_for_empty_output() {
let cfg = MinimizerConfig { enabled: true, ..Default::default() };
let out = apply("cargo build", " Compiling app v0.1.0\n", 1, &cfg);
let input = " Compiling app v0.1.0\n".repeat(200);
let out = apply("cargo build", &input, 1, &cfg);
assert!(out.changed);
assert_eq!(out.text, "");
@@ -797,25 +855,21 @@ strip_lines_matching = [".*"]
assert!(should_minimize("ctest --output-on-failure", &cfg));
assert!(should_minimize("./build/foo_test --gtest_filter=Foo.*", &cfg));
let ctest = apply(
"ctest --output-on-failure",
let ctest_input = minimizable_input(
"Test project /tmp/build\n1/2 Test #1: ok ........ Passed 0.01 sec\n2/2 Test #2: \
bad .......***Failed 0.02 sec\nThe following tests FAILED:\n",
8,
&cfg,
);
let ctest = apply("ctest --output-on-failure", &ctest_input, 8, &cfg);
assert!(ctest.changed);
assert_eq!(ctest.filter, "ctest");
assert!(!ctest.text.contains("Test #1"));
assert!(ctest.text.contains("Test #2: bad"));
let gtest = apply(
"./build/foo_test",
let gtest_input = minimizable_input(
"[ RUN ] Foo.Pass\n[ OK ] Foo.Pass (0 ms)\nfoo_test.cc:42: Failure\nExpected: \
1\n[ FAILED ] Foo.Fails\n",
1,
&cfg,
);
let gtest = apply("./build/foo_test", &gtest_input, 1, &cfg);
assert!(gtest.changed);
assert_eq!(gtest.filter, "gtest");
assert!(!gtest.text.contains("Foo.Pass"));
@@ -1037,10 +1091,12 @@ strip_lines_matching = [".*"]
#[test]
fn rails_db_migrate_routes_to_standalone_def() {
let cfg = MinimizerConfig { enabled: true, ..Default::default() };
let input = "== 20240115 CreateUsers: migrating\n-- create_table(:users)\n -> 0.0234s\n== \
20240115 CreateUsers: migrated\n\n== 20240116 AddIndexToOrders: migrating\n-- \
add_index(:orders)\n -> 0.0123s\n== 20240116 AddIndexToOrders: migrated\n";
let out = apply("rails db:migrate", input, 0, &cfg);
let input = minimizable_input(
"== 20240115 CreateUsers: migrating\n-- create_table(:users)\n -> 0.0234s\n== 20240115 \
CreateUsers: migrated\n\n== 20240116 AddIndexToOrders: migrating\n-- \
add_index(:orders)\n -> 0.0123s\n== 20240116 AddIndexToOrders: migrated\n",
);
let out = apply("rails db:migrate", &input, 0, &cfg);
assert!(out.changed);
assert!(out.text.contains("✓ CreateUsers"));
assert!(out.text.contains("✓ AddIndexToOrders"));
@@ -1053,8 +1109,10 @@ strip_lines_matching = [".*"]
#[test]
fn rails_routes_routes_to_standalone_def() {
let cfg = MinimizerConfig { enabled: true, ..Default::default() };
let input = " Prefix Verb URI Pattern Controller#Action\n root GET / home#index\n";
let out = apply("rails routes", input, 0, &cfg);
let input = minimizable_input(
" Prefix Verb URI Pattern Controller#Action\n root GET / home#index\n",
);
let out = apply("rails routes", &input, 0, &cfg);
assert!(out.changed);
assert!(!out.text.contains("Prefix"));
assert!(out.text.contains("root GET"));
@@ -1064,8 +1122,10 @@ strip_lines_matching = [".*"]
#[test]
fn rake_routes_regression_unminimized() {
let cfg = MinimizerConfig { enabled: true, ..Default::default() };
let input = " Prefix Verb URI Pattern Controller#Action\n root GET / home#index\n";
let out = apply("rake routes", input, 0, &cfg);
let input = minimizable_input(
" Prefix Verb URI Pattern Controller#Action\n root GET / home#index\n",
);
let out = apply("rake routes", &input, 0, &cfg);
assert!(out.changed, "rake routes should be minimized by the rails-routes def");
assert!(!out.text.contains("Prefix"));
assert!(out.text.contains("root GET"));
@@ -1074,9 +1134,11 @@ strip_lines_matching = [".*"]
#[test]
fn bundle_exec_rails_db_migrate_reaches_def() {
let cfg = MinimizerConfig { enabled: true, ..Default::default() };
let input = "== 20240115 CreateUsers: migrating\n-- create_table(:users)\n -> 0.0234s\n== \
20240115 CreateUsers: migrated\n";
let out = apply("bundle exec rails db:migrate", input, 0, &cfg);
let input = minimizable_input(
"== 20240115 CreateUsers: migrating\n-- create_table(:users)\n -> 0.0234s\n== 20240115 \
CreateUsers: migrated\n",
);
let out = apply("bundle exec rails db:migrate", &input, 0, &cfg);
assert!(out.changed);
assert!(out.text.contains("CreateUsers"));
assert!(!out.text.contains("-- create_table"));
@@ -1085,8 +1147,10 @@ strip_lines_matching = [".*"]
#[test]
fn bundle_exec_rails_routes_reaches_def() {
let cfg = MinimizerConfig { enabled: true, ..Default::default() };
let input = " Prefix Verb URI Pattern Controller#Action\n root GET / home#index\n";
let out = apply("bundle exec rails routes", input, 0, &cfg);
let input = minimizable_input(
" Prefix Verb URI Pattern Controller#Action\n root GET / home#index\n",
);
let out = apply("bundle exec rails routes", &input, 0, &cfg);
assert!(out.changed);
assert!(!out.text.contains("Prefix"));
assert!(out.text.contains("root GET"));
@@ -1119,11 +1183,13 @@ strip_lines_matching = [".*"]
#[test]
fn rails_db_migrate_keyword_in_name_not_dropped() {
let cfg = MinimizerConfig { enabled: true, ..Default::default() };
let input = "== 20240115 CreateTestResults: migrating\n-- create_table(:test_results)\n \
-> 0.0234s\n== 20240115 CreateTestResults: migrated\n\n== 20240116 \
AddIndexToOrders: migrating\n-- add_index(:orders)\n -> 0.0123s\n== 20240116 \
AddIndexToOrders: migrated\n";
let out = apply("rails db:migrate", input, 0, &cfg);
let input = minimizable_input(
"== 20240115 CreateTestResults: migrating\n-- create_table(:test_results)\n -> \
0.0234s\n== 20240115 CreateTestResults: migrated\n\n== 20240116 AddIndexToOrders: \
migrating\n-- add_index(:orders)\n -> 0.0123s\n== 20240116 AddIndexToOrders: \
migrated\n",
);
let out = apply("rails db:migrate", &input, 0, &cfg);
assert!(out.changed);
// Both migrations must survive; the old overlay-on-rake would keep only
// lines containing "test" and silently drop AddIndexToOrders.
@@ -1209,12 +1275,10 @@ mod pipeline_integration_tests {
enabled: Some(true),
..Default::default()
});
let out = apply(
"gradle build",
let input = minimizable_input(
"> Task :app:compileJava UP-TO-DATE\n> Task :app:test\nBUILD SUCCESSFUL in 8s\n",
0,
&cfg,
);
let out = apply("gradle build", &input, 0, &cfg);
// gradle.toml is deleted; gradle now dispatches to the Rust jvm Build
// filter, which strips `> Task :…UP-TO-DATE` task-progress noise (the
// carried-over defs/gradle.toml behaviour, now as a Rust filter — NOT a
crates/pi-shell/src/minimizer/filters/mod.rs
+23 -9
View File
@@ -488,7 +488,7 @@ fn wrapper_invoked_tool<'a>(ctx: &'a MinimizerCtx<'_>, tools: &[&'a str]) -> Opt
#[cfg(test)]
mod tests {
use super::*;
use crate::minimizer::MinimizerConfig;
use crate::minimizer::{MinimizerConfig, engine::MIN_MINIMIZE_CHARS};
fn ctx<'a>(
program: &'a str,
@@ -499,6 +499,14 @@ mod tests {
MinimizerCtx { program, subcommand, command, config }
}
fn minimizable_input(input: &str) -> String {
let mut output = input.to_string();
while output.chars().count() < MIN_MINIMIZE_CHARS {
output.push('\n');
}
output
}
#[test]
fn npx_test_tools_route_to_node_test_filter() {
let config = MinimizerConfig::default();
@@ -975,9 +983,11 @@ mod tests {
fn bundle_exec_rails_db_migrate_routes_to_def() {
let config = MinimizerConfig { enabled: true, ..Default::default() };
let context = ctx("bundle", Some("exec"), "bundle exec rails db:migrate", &config);
let input = "== 20240115 CreateUsers: migrating\n-- create_table(:users)\n -> 0.0234s\n== \
20240115 CreateUsers: migrated\n";
let out = filter(&context, input, 0);
let input = minimizable_input(
"== 20240115 CreateUsers: migrating\n-- create_table(:users)\n -> 0.0234s\n== 20240115 \
CreateUsers: migrated\n",
);
let out = filter(&context, &input, 0);
assert!(out.changed);
assert!(out.text.contains("CreateUsers"));
assert!(!out.text.contains("-- create_table"));
@@ -987,8 +997,10 @@ mod tests {
fn bundle_exec_rails_routes_routes_to_def() {
let config = MinimizerConfig { enabled: true, ..Default::default() };
let context = ctx("bundle", Some("exec"), "bundle exec rails routes", &config);
let input = " Prefix Verb URI Pattern Controller#Action\n root GET / home#index\n";
let out = filter(&context, input, 0);
let input = minimizable_input(
" Prefix Verb URI Pattern Controller#Action\n root GET / home#index\n",
);
let out = filter(&context, &input, 0);
assert!(out.changed);
assert!(!out.text.contains("Prefix"));
assert!(out.text.contains("root GET"));
@@ -998,9 +1010,11 @@ mod tests {
fn bundle_exec_rspec_routes_to_ruby_filter() {
let config = MinimizerConfig { enabled: true, ..Default::default() };
let context = ctx("bundle", Some("exec"), "bundle exec rspec", &config);
let input = "Randomized with seed 12345\n\nUserController\n GET /users\n returns a list \
of users\n\nFinished in 0.45 seconds\n5 examples, 0 failures\n";
let out = filter(&context, input, 0);
let input = minimizable_input(
"Randomized with seed 12345\n\nUserController\n GET /users\n returns a list of \
users\n\nFinished in 0.45 seconds\n5 examples, 0 failures\n",
);
let out = filter(&context, &input, 0);
assert!(out.changed);
assert!(out.text.contains("5 examples, 0 failures"));
assert!(!out.text.contains("returns a list of users"));
crates/pi-shell/src/minimizer/pipeline.rs
+33 -3
View File
@@ -20,7 +20,9 @@
//! 6. `truncate_lines_at` — per-line Unicode-safe char cap
//! 7. `head_lines` / `tail_lines` — keep first/last N lines with a marker
//! 8. `max_lines` — hard cap after head/tail
//! 9. `on_empty` — replace an empty result with a sentinel
//! 9. `preserve_if_empty` — keep the original input when filtering removes
//! every line
//! 10. `on_empty` — replace an empty result with a sentinel
//!
//! Pipelines never panic for the caller: regex compilation errors are
//! surfaced when the pipeline is loaded, and runtime application is total.
@@ -66,6 +68,11 @@ pub struct PipelineDef {
pub tail_lines: Option<usize>,
pub max_lines: Option<usize>,
pub on_empty: Option<String>,
/// Return the original input unchanged when all filtering stages remove it.
/// Useful for diagnostic filters that must not discard an unrecognized
/// successful output, such as a compiler query response.
#[serde(default)]
pub preserve_if_empty: bool,
/// Apply only when the command exit code is in this list. Empty = always.
#[serde(default)]
pub only_on_exit: Vec<i32>,
@@ -146,6 +153,7 @@ pub struct CompiledPipeline {
pub tail_lines: Option<usize>,
pub max_lines: Option<usize>,
pub on_empty: Option<String>,
pub preserve_if_empty: bool,
pub only_on_exit: Vec<i32>,
pub except_on_exit: Vec<i32>,
}
@@ -225,6 +233,7 @@ pub fn compile(name: String, def: PipelineDef) -> Result<CompiledPipeline, Strin
tail_lines: def.tail_lines,
max_lines: def.max_lines,
on_empty: def.on_empty,
preserve_if_empty: def.preserve_if_empty,
only_on_exit: def.only_on_exit,
except_on_exit: def.except_on_exit,
})
@@ -258,7 +267,7 @@ impl CompiledPipeline {
false
}
/// Apply the full 9-stage pipeline to `input`.
/// Apply the full 10-stage pipeline to `input`.
#[must_use]
pub fn apply<'a>(&self, input: &'a str) -> Cow<'a, str> {
// Stage 1: strip_ansi
@@ -330,7 +339,14 @@ impl CompiledPipeline {
stage7
};
// Stage 9: on_empty
// Stage 9: preserve the source when a keep-only filter removed every line.
// This prevents a successful query/diagnostic command's meaningful output
// from being replaced by the engine's generic "OK" sentinel.
if self.preserve_if_empty && stage8.trim().is_empty() {
return Cow::Borrowed(input);
}
// Stage 10: on_empty
if let Some(msg) = self.on_empty.as_deref()
&& stage8.trim().is_empty()
{
@@ -592,6 +608,20 @@ replacement = ""
assert_eq!(out.as_ref(), "file.rs\n");
}
#[test]
fn preserve_if_empty_returns_original_when_filter_drops_every_line() {
let src = r#"
schema_version = 1
[filters.keep]
match_command = "^keep$"
keep_lines_matching = ["^diagnostic:"]
preserve_if_empty = true
"#;
let pipeline = compile_one(src);
let input = "query result\n";
assert_eq!(pipeline.apply(input).as_ref(), input);
}
#[test]
fn on_empty_fires_when_output_is_blank() {
let src = r#"
crates/pi-shell/src/shell.rs
+29 -41
View File
@@ -4499,20 +4499,17 @@ replace = [{ pattern = "hello", replacement = "HI" }]
async fn segmented_false_semicolon_printf_continues_and_returns_last_code() {
let root = unique_temp_dir("false-semi");
let minimizer = printf_minimizer(&root.join("minimizer.toml"), None);
let (result, output) = run_command_capture(
"false ; printf 'hello\n'",
None,
Some(minimizer),
CancelToken::default(),
)
.await;
let expected = "hello\n".repeat(200);
let command = format!("false ; printf '{}'", "hello\\n".repeat(200));
let (result, output) =
run_command_capture(&command, None, Some(minimizer), CancelToken::default()).await;
let _ = std::fs::remove_dir_all(&root);
let minimized = result.minimized.expect("minimized result");
let minimized = result.minimized.expect("long output should be minimized");
assert_eq!(result.exit_code, Some(0));
assert_eq!(output, "hello\n");
assert_eq!(output, expected);
assert_eq!(minimized.filter, "chain");
assert_eq!(minimized.original_text, "hello\n");
assert_eq!(minimized.text, "HI\n");
assert_eq!(minimized.original_text, expected);
assert_eq!(minimized.text, "HI\n".repeat(200));
}
#[cfg(unix)]
@@ -4544,12 +4541,9 @@ replace = [{ pattern = "^.+$", replacement = "PWD" }]
run_command_capture("cd tmp && pwd", Some(&root), Some(minimizer), CancelToken::default())
.await;
let _ = std::fs::remove_dir_all(&root);
let minimized = result.minimized.expect("minimized result");
assert!(result.minimized.is_none(), "short pwd output must not be minimized");
assert_eq!(result.exit_code, Some(0));
assert_eq!(output, expected);
assert_eq!(minimized.filter, "chain");
assert_eq!(minimized.text, "PWD\n");
assert_eq!(minimized.original_text, expected);
}
#[cfg(unix)]
@@ -4575,22 +4569,21 @@ replace = [{ pattern = "^.+$", replacement = "PWD" }]
async fn segmented_printf_chain_preserves_raw_original_text() {
let root = unique_temp_dir("minimizer");
let minimizer = printf_minimizer(&root.join("minimizer.toml"), None);
let (result, output) = run_command_capture(
"printf 'hello\n' ; printf 'world\n'",
None,
Some(minimizer),
CancelToken::default(),
)
.await;
let hello = "hello\n".repeat(200);
let world = "world\n".repeat(200);
let command =
format!("printf '{}' ; printf '{}'", "hello\\n".repeat(200), "world\\n".repeat(200));
let (result, output) =
run_command_capture(&command, None, Some(minimizer), CancelToken::default()).await;
let _ = std::fs::remove_dir_all(&root);
let minimized = result.minimized.expect("minimized result");
let minimized = result.minimized.expect("long output should be minimized");
assert_eq!(result.exit_code, Some(0));
assert_eq!(output, "hello\nworld\n");
assert_eq!(output, format!("{hello}{world}"));
assert_eq!(minimized.filter, "chain");
assert_eq!(minimized.original_text, "hello\nworld\n");
assert_eq!(minimized.text, "HI\nworld\n");
assert_eq!(minimized.input_bytes, 12);
assert_eq!(minimized.output_bytes, 9);
assert_eq!(minimized.original_text, format!("{hello}{world}"));
assert_eq!(minimized.text, format!("{}{}", "HI\n".repeat(200), world));
assert_eq!(minimized.input_bytes, (hello.len() + world.len()) as u32);
assert_eq!(minimized.output_bytes, ("HI\n".repeat(200).len() + world.len()) as u32);
}
/// Regression: a quoted here-doc followed by another command must execute
@@ -4659,24 +4652,19 @@ replace = [{ pattern = "^.+$", replacement = "PWD" }]
async fn segmented_chain_with_redirect_executes_correctly() {
let root = unique_temp_dir("redirect-chain");
let minimizer = printf_minimizer(&root.join("minimizer.toml"), None);
let (result, output) = run_command_capture(
"echo hidden >/dev/null && printf 'hello\\n'",
None,
Some(minimizer),
CancelToken::default(),
)
.await;
let expected = "hello\n".repeat(200);
let command = format!("echo hidden >/dev/null && printf '{}'", "hello\\n".repeat(200));
let (result, output) =
run_command_capture(&command, None, Some(minimizer), CancelToken::default()).await;
let _ = std::fs::remove_dir_all(&root);
assert_eq!(result.exit_code, Some(0));
// The redirect survived reconstruction: segment 1's stdout went to
// /dev/null, so only segment 2's output is captured.
assert!(!output.contains("hidden"), "redirect must suppress segment-1 stdout");
assert_eq!(output, "hello\n");
let minimized = result
.minimized
.expect("redirect chain should be minimized");
assert_eq!(minimized.original_text, "hello\n");
assert_eq!(minimized.text, "HI\n");
assert_eq!(output, expected);
let minimized = result.minimized.expect("long output should be minimized");
assert_eq!(minimized.original_text, expected);
assert_eq!(minimized.text, "HI\n".repeat(200));
assert!(!output.contains("syntax error"));
}
crates/pi-shell/tests/minimizer_fixtures.rs
+35 -45
View File
@@ -9,32 +9,27 @@
//! - `<case>.exit` — integer exit code (optional; defaults to 0).
//! - `<case>.min` — expected minimized snapshot (optional, see gate below).
//!
//! Gate per fixture (`raw` measured in bytes):
//! Gate per fixture:
//!
//! - `raw.len() >= 500`: assert `minimized.len() <= 0.40 * raw.len()` — the
//! savings gate. A short output is not worth a filter round-trip, so the gate
//! only applies to buffers large enough to matter.
//! - `raw.len() < 500`: a `.min` snapshot is REQUIRED and must match exactly.
//! Small buffers cannot meaningfully clear a ratio gate, so they are pinned
//! by an exact snapshot instead.
//! - `.min` present alongside a `>= 500`-byte raw: assert BOTH the savings gate
//! and the exact snapshot.
//! - `raw.chars().count() < MIN_MINIMIZE_CHARS`: the minimizer must return the
//! raw output unchanged; short output is never filtered.
//! - `raw.chars().count() >= MIN_MINIMIZE_CHARS`: assert `minimized.len() <=
//! 0.40 * raw.len()` — the savings gate, measured in bytes because the
//! output-size budget is byte-based.
//! - `.min` present alongside an eligible raw buffer: assert BOTH the savings
//! gate and the exact snapshot.
//!
//! All fixture failures are collected before the harness panics so a single run
//! reports every regression, not just the first.
use std::{fmt::Write as _, fs, path::Path};
use pi_shell::minimizer::{self, MinimizerConfig};
use pi_shell::minimizer::{self, MinimizerConfig, engine::MIN_MINIMIZE_CHARS};
/// Byte-savings gate: minimized output must be at most this fraction of the raw
/// input for buffers large enough to be worth filtering.
const SAVINGS_RATIO: f64 = 0.40;
/// Raw buffers below this byte length are pinned by an exact `.min` snapshot
/// instead of the ratio gate.
const GATE_MIN_BYTES: usize = 500;
/// A single discovered fixture: the `.cmd`/`.raw` pair plus its optional
/// `.exit` and `.min` companions.
struct Fixture {
@@ -85,9 +80,20 @@ fn minimizer_fixtures_clear_savings_gate() {
fn check_fixture(fixture: &Fixture, cfg: &MinimizerConfig) -> Result<(), String> {
let out = minimizer::apply(&fixture.command, &fixture.raw, fixture.exit, cfg);
let minimized = out.text.as_str();
let raw_chars = fixture.raw.chars().count();
let raw_len = fixture.raw.len();
let min_len = minimized.len();
if raw_chars < MIN_MINIMIZE_CHARS {
if minimized == fixture.raw {
return Ok(());
}
return Err(format!(
"[{}] cmd={:?} exit={} raw={} chars: short output was modified",
fixture.name, fixture.command, fixture.exit, raw_chars,
));
}
let ratio = if raw_len == 0 {
0.0
} else {
@@ -95,36 +101,20 @@ fn check_fixture(fixture: &Fixture, cfg: &MinimizerConfig) -> Result<(), String>
};
let mut problems: Vec<String> = Vec::new();
if raw_len >= GATE_MIN_BYTES {
let budget = (SAVINGS_RATIO * raw_len as f64).floor() as usize;
if min_len > budget {
problems.push(format!(
"savings gate: minimized {min_len} B > {budget} B budget ({:.1}% of {raw_len} B raw, \
limit {:.0}%)",
ratio * 100.0,
SAVINGS_RATIO * 100.0
));
}
// A `.min` alongside a large raw pins the exact shape too.
if let Some(expected) = &fixture.expected
&& expected != minimized
{
problems.push(format!("snapshot mismatch:\n{}", diff_excerpt(expected, minimized)));
}
} else {
// Small buffers cannot meaningfully clear a ratio gate; require an exact
// snapshot instead.
match &fixture.expected {
None => problems.push(format!(
"raw is {raw_len} B (< {GATE_MIN_BYTES} B): a `.min` snapshot is required for \
sub-threshold fixtures"
)),
Some(expected) if expected != minimized => {
problems.push(format!("snapshot mismatch:\n{}", diff_excerpt(expected, minimized)));
},
Some(_) => {},
}
let budget = (SAVINGS_RATIO * raw_len as f64).floor() as usize;
if min_len > budget {
problems.push(format!(
"savings gate: minimized {min_len} B > {budget} B budget ({:.1}% of {raw_len} B raw, \
limit {:.0}%)",
ratio * 100.0,
SAVINGS_RATIO * 100.0
));
}
// A `.min` alongside an eligible raw buffer pins the exact shape too.
if let Some(expected) = &fixture.expected
&& expected != minimized
{
problems.push(format!("snapshot mismatch:\n{}", diff_excerpt(expected, minimized)));
}
if problems.is_empty() {
packages/coding-agent/CHANGELOG.md
+1
View File
@@ -5,6 +5,7 @@
### Fixed
- Fixed shell minimization replacing meaningful `rustc --print` output with `OK`.
- Fixed shell minimization altering outputs shorter than 1,000 characters; these now pass through unchanged.
## [17.2.11] - 2026-08-07