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-rw-r--r--crates/shirabe-php-rpc/php/runtime/Shirabe/MaterializedThrowable.php70
-rw-r--r--crates/shirabe-php-rpc/php/worker.php15
-rw-r--r--crates/shirabe-php-rpc/src/frame.rs68
-rw-r--r--crates/shirabe-php-rpc/src/lib.rs17
-rw-r--r--crates/shirabe/src/event_dispatcher/event_dispatcher.rs1
-rw-r--r--crates/shirabe/src/plugin/php_plugin_proxy.rs111
-rw-r--r--crates/shirabe/src/plugin/php_plugin_value.rs1
-rw-r--r--crates/shirabe/tests/plugin/e2e_exception_test.rs79
-rw-r--r--crates/shirabe/tests/plugin/fixtures/e2e-exception/plugin/composer.json17
-rw-r--r--crates/shirabe/tests/plugin/fixtures/e2e-exception/plugin/src/Plugin.php92
-rw-r--r--crates/shirabe/tests/plugin/fixtures/e2e-exception/project/composer.json24
-rw-r--r--crates/shirabe/tests/plugin/main.rs1
12 files changed, 462 insertions, 34 deletions
diff --git a/crates/shirabe-php-rpc/php/runtime/Shirabe/MaterializedThrowable.php b/crates/shirabe-php-rpc/php/runtime/Shirabe/MaterializedThrowable.php
new file mode 100644
index 00000000..7227a5f3
--- /dev/null
+++ b/crates/shirabe-php-rpc/php/runtime/Shirabe/MaterializedThrowable.php
@@ -0,0 +1,70 @@
+<?php
+
+// The PHP half of the Throw frame's exception codec. A Rust-side failure carries the class it
+// was thrown as, so `catch (TransportException $e)` in plugin code catches what it would catch
+// under Composer, plus the state that class declares beyond message and code.
+
+namespace Shirabe;
+
+final class MaterializedThrowable
+{
+ /**
+ * Rebuilds the exception a Throw frame describes. A class the child cannot construct from a
+ * message and a code keeps the RuntimeException shape, which is all the frame guarantees.
+ *
+ * @param array<string, mixed> $properties
+ */
+ public static function revive(string $class, string $message, int $code, array $properties): \Throwable
+ {
+ $exception = self::instantiate($class, $message, $code);
+ foreach ($properties as $name => $value) {
+ // A name the class does not declare is a Shirabe bug rather than a plugin one, and
+ // ReflectionProperty reports it as such instead of dropping the state silently.
+ $property = new \ReflectionProperty($exception, $name);
+ $property->setAccessible(true);
+ $property->setValue($exception, $value);
+ }
+
+ return $exception;
+ }
+
+ private static function instantiate(string $class, string $message, int $code): \Throwable
+ {
+ if ($class === '' || !class_exists($class) || !is_a($class, \Throwable::class, true)) {
+ return new \RuntimeException($message, $code);
+ }
+ $constructor = (new \ReflectionClass($class))->getConstructor();
+ if ($constructor === null || !self::acceptsMessageAndCode($constructor)) {
+ return new \RuntimeException($message, $code);
+ }
+
+ return new $class($message, $code);
+ }
+
+ /**
+ * Whether the constructor has \Exception's shape as far as the frame fills it in: a string
+ * message, an int code, and nothing else required.
+ */
+ private static function acceptsMessageAndCode(\ReflectionMethod $constructor): bool
+ {
+ $parameters = $constructor->getParameters();
+ if (count($parameters) < 2) {
+ return false;
+ }
+ foreach ($parameters as $position => $parameter) {
+ $type = $parameter->getType();
+ $name = $type instanceof \ReflectionNamedType ? $type->getName() : null;
+ if ($position === 0 && $name !== 'string') {
+ return false;
+ }
+ if ($position === 1 && $name !== 'int') {
+ return false;
+ }
+ if ($position >= 2 && !$parameter->isOptional()) {
+ return false;
+ }
+ }
+
+ return true;
+ }
+}
diff --git a/crates/shirabe-php-rpc/php/worker.php b/crates/shirabe-php-rpc/php/worker.php
index bc10c2de..defa4fb5 100644
--- a/crates/shirabe-php-rpc/php/worker.php
+++ b/crates/shirabe-php-rpc/php/worker.php
@@ -337,10 +337,13 @@ final class ShirabeRpcRuntime
$outParams = self::fromWire($fields[1] ?? []);
return self::fromWire($fields[0]);
}
- [$class, $message, $code] = $fields;
- // TODO(plugin): reconstruct the original exception class instead of collapsing
- // everything to RuntimeException.
- throw new RuntimeException($message, (int) $code);
+ [$class, $message, $code, $properties] = $fields;
+ throw \Shirabe\MaterializedThrowable::revive(
+ $class,
+ $message,
+ (int) $code,
+ self::fromWire($properties)
+ );
}
self::dispatchRequest($tag, $inId, $payload);
}
@@ -435,7 +438,9 @@ final class ShirabeRpcRuntime
self::writeFrame(
SHIRABE_TAG_THROW,
$corrId,
- serialize([get_class($e), $e->getMessage(), (int) $e->getCode()])
+ // TODO(plugin): the properties field is empty in this direction; no Rust-side
+ // consumer rebuilds a ported exception from a Throw frame yet.
+ serialize([get_class($e), $e->getMessage(), (int) $e->getCode(), []])
);
}
}
diff --git a/crates/shirabe-php-rpc/src/frame.rs b/crates/shirabe-php-rpc/src/frame.rs
index 3a355c86..fe7752bd 100644
--- a/crates/shirabe-php-rpc/src/frame.rs
+++ b/crates/shirabe-php-rpc/src/frame.rs
@@ -66,6 +66,9 @@ pub enum Frame {
exception_class: String,
message: String,
code: i64,
+ /// The state the exception carries beyond `message` and `code`, keyed by the property
+ /// names its class declares. Empty for an exception that carries none.
+ properties: IndexMap<String, PluginValue>,
},
ReleaseRustHandle {
rhandle: u64,
@@ -180,11 +183,18 @@ impl Frame {
exception_class,
message,
code,
+ properties,
..
} => vec![
PluginValue::string(exception_class.clone()),
PluginValue::string(message.clone()),
PluginValue::Int(*code),
+ PluginValue::Array(
+ properties
+ .iter()
+ .map(|(name, v)| (name.clone().into_bytes(), v.clone()))
+ .collect(),
+ ),
],
Frame::ReleaseRustHandle { rhandle } => vec![int_value(*rhandle)],
Frame::ReleasePhpHandle { phandle } => vec![int_value(*phandle)],
@@ -302,6 +312,7 @@ fn decode_frame(tag: u8, corr_id: u64, payload: &[u8]) -> Frame {
panic!("PHP RPC: protocol violation — Throw code is not an int: {other:?}")
}
},
+ properties: expect_properties(next()),
},
TAG_RELEASE_RUST_HANDLE => Frame::ReleaseRustHandle {
rhandle: expect_id(next()),
@@ -354,6 +365,27 @@ fn expect_positions(value: PluginValue) -> Vec<u32> {
.collect()
}
+fn expect_properties(value: PluginValue) -> IndexMap<String, PluginValue> {
+ match value {
+ PluginValue::List(items) if items.is_empty() => IndexMap::new(),
+ PluginValue::Array(map) => map
+ .into_iter()
+ .map(|(key, item)| {
+ let name = String::from_utf8(key).unwrap_or_else(|error| {
+ panic!(
+ "PHP RPC: protocol violation — exception property name is not UTF-8: {:?}",
+ String::from_utf8_lossy(error.as_bytes())
+ )
+ });
+ (name, item)
+ })
+ .collect(),
+ other => {
+ panic!("PHP RPC: protocol violation — exception properties is not an array: {other:?}")
+ }
+ }
+}
+
fn expect_out_params(value: PluginValue) -> IndexMap<u32, PluginValue> {
match value {
PluginValue::List(items) if items.is_empty() => IndexMap::new(),
@@ -416,6 +448,42 @@ mod tests {
}
#[test]
+ fn frame_roundtrip_throw_with_properties() {
+ let frame = roundtrip(Frame::Throw {
+ corr_id: 11,
+ exception_class: "Composer\\Downloader\\TransportException".to_string(),
+ message: "The \"https://example.org\" file could not be downloaded".to_string(),
+ code: 401,
+ properties: [
+ ("statusCode".to_string(), PluginValue::Int(401)),
+ ("response".to_string(), PluginValue::Null),
+ ]
+ .into_iter()
+ .collect(),
+ });
+ match frame {
+ Frame::Throw {
+ corr_id,
+ exception_class,
+ message,
+ code,
+ properties,
+ } => {
+ assert_eq!(corr_id, 11);
+ assert_eq!(exception_class, "Composer\\Downloader\\TransportException");
+ assert_eq!(
+ message,
+ "The \"https://example.org\" file could not be downloaded"
+ );
+ assert_eq!(code, 401);
+ assert_eq!(properties.get("statusCode"), Some(&PluginValue::Int(401)));
+ assert_eq!(properties.get("response"), Some(&PluginValue::Null));
+ }
+ other => panic!("unexpected frame: {other:?}"),
+ }
+ }
+
+ #[test]
fn frame_roundtrip_return_with_out_params() {
let frame = roundtrip(Frame::Return {
corr_id: 9,
diff --git a/crates/shirabe-php-rpc/src/lib.rs b/crates/shirabe-php-rpc/src/lib.rs
index dfd8fa67..c898fb82 100644
--- a/crates/shirabe-php-rpc/src/lib.rs
+++ b/crates/shirabe-php-rpc/src/lib.rs
@@ -621,6 +621,15 @@ pub struct PhpThrow {
pub exception_class: String,
pub message: String,
pub code: i64,
+ /// The state the exception carries beyond `message` and `code`, keyed by the property names
+ /// its class declares. The child revives them onto the instance it rebuilds.
+ ///
+ /// TODO(plugin): populated only Rust to PHP. An exception a plugin throws crosses with its
+ /// class, message and code alone, because no Rust-side consumer rebuilds a ported exception
+ /// from a `PhpThrow` yet.
+ ///
+ /// Boxed so a `Result<_, PhpThrow>` stays small; every dispatcher returns one.
+ pub properties: Box<IndexMap<String, PluginValue>>,
}
impl PhpThrow {
@@ -629,6 +638,7 @@ impl PhpThrow {
exception_class: "RuntimeException".to_string(),
message,
code: 0,
+ properties: Box::new(IndexMap::new()),
}
}
}
@@ -805,11 +815,13 @@ fn rpc_call(
exception_class,
message,
code,
+ properties,
} if corr_id == my_id => {
return Ok(Err(PhpThrow {
exception_class,
message,
code,
+ properties: Box::new(properties),
}));
}
Frame::CallRustMethod {
@@ -846,6 +858,7 @@ fn rpc_call(
exception_class: throw.exception_class,
message: throw.message,
code: throw.code,
+ properties: *throw.properties,
},
};
send_frame(&reply)?;
@@ -1042,6 +1055,10 @@ const RUNTIME_FILES: &[(&str, &str)] = &[
include_str!("../php/runtime/Composer/EventDispatcher/Event.php"),
),
(
+ "Shirabe/MaterializedThrowable.php",
+ include_str!("../php/runtime/Shirabe/MaterializedThrowable.php"),
+ ),
+ (
"Shirabe/MaterializedValue.php",
include_str!("../php/runtime/Shirabe/MaterializedValue.php"),
),
diff --git a/crates/shirabe/src/event_dispatcher/event_dispatcher.rs b/crates/shirabe/src/event_dispatcher/event_dispatcher.rs
index 7b620e5b..af629190 100644
--- a/crates/shirabe/src/event_dispatcher/event_dispatcher.rs
+++ b/crates/shirabe/src/event_dispatcher/event_dispatcher.rs
@@ -1840,6 +1840,7 @@ fn runtime_throw(message: String) -> PhpThrow {
exception_class: "RuntimeException".to_string(),
message,
code: 0,
+ properties: Box::new(IndexMap::new()),
}
}
diff --git a/crates/shirabe/src/plugin/php_plugin_proxy.rs b/crates/shirabe/src/plugin/php_plugin_proxy.rs
index 84bf195f..a1233391 100644
--- a/crates/shirabe/src/plugin/php_plugin_proxy.rs
+++ b/crates/shirabe/src/plugin/php_plugin_proxy.rs
@@ -9,6 +9,7 @@ use crate::autoload::ClassLoader;
use crate::command::BaseCommand;
use crate::composer::ComposerHandle;
use crate::dependency_resolver::operation::AnyOperation;
+use crate::downloader::TransportException;
use crate::event_dispatcher::event_dispatcher::dispatch_event_method;
use crate::event_dispatcher::{
EventInterface, EventSubscriberInterface, SubscribedEventEntry, unwrap_php_result,
@@ -32,7 +33,7 @@ use shirabe_php_rpc::{
PhpObjHandle, PhpThrow, PluginValue, RustMethodDispatcher, RustObjHandle,
call_function_with_dispatcher, call_php_method, new_object, release_php_handle,
};
-use shirabe_php_shim::PhpMixed;
+use shirabe_php_shim::{AnyThrowable, Catch as _, PhpClass as _, PhpMixed};
use shirabe_symfony_console::command::Command;
use shirabe_symfony_console::input::InputInterface;
use shirabe_symfony_console::input::InputValue;
@@ -640,7 +641,7 @@ fn dispatch_plugin_method(
})?;
let capabilities = capable
.get_capabilities()
- .map_err(|error| runtime_throw(format!("getCapabilities failed: {error:#}")))?;
+ .map_err(|error| error_throw("getCapabilities failed", &error))?;
Ok(capabilities.to_plugin_value())
}
// TODO(plugin): the lifecycle methods would have to turn the `$composer`/`$io` stubs the
@@ -718,14 +719,14 @@ fn dispatch_config_method(
let value = config
.borrow()
.get_with_flags(&key(0)?, flags(1)?)
- .map_err(|error| runtime_throw(format!("get failed over RPC: {error}")))?;
+ .map_err(|error| error_throw("get failed over RPC", &error))?;
Ok(value.to_plugin_value())
}
"all" => {
let all = config
.borrow_mut()
.all(flags(0)?)
- .map_err(|error| runtime_throw(format!("all failed over RPC: {error}")))?;
+ .map_err(|error| error_throw("all failed over RPC", &error))?;
Ok(all.to_plugin_value())
}
"raw" => Ok(config.borrow().raw().to_plugin_value()),
@@ -831,11 +832,7 @@ fn dispatch_download_manager_method(
.await
}
}
- .map_err(|error| {
- // TODO(plugin): the original exception class is collapsed to
- // RuntimeException on this side of the boundary.
- runtime_throw(format!("{method_name} failed over RPC: {error:#}"))
- })
+ .map_err(|error| error_throw(&format!("{method_name} failed over RPC"), &error))
})?;
resolved_promise(resolved.to_plugin_value())
}
@@ -870,9 +867,7 @@ fn dispatch_filesystem_method(
args: &[PluginValue],
) -> Result<PluginValue, PhpThrow> {
let string_arg = |position: usize| arg::<String>(method_name, args, position);
- // TODO(plugin): the exception class the real method throws (RuntimeException, IOException,
- // LogicException) is collapsed to RuntimeException on this side of the boundary.
- let failed = |error: anyhow::Error| runtime_throw(format!("{method_name} failed: {error:#}"));
+ let failed = |error: anyhow::Error| error_throw(&format!("{method_name} failed"), &error);
match method_name {
"remove" => Ok(fs
.borrow_mut()
@@ -949,6 +944,7 @@ fn dispatch_filesystem_method(
exception_class: "InvalidArgumentException".to_string(),
message: format!("$from ({from}) and $to ({to}) must be absolute paths."),
code: 0,
+ properties: Box::new(IndexMap::new()),
});
}
Ok(if method_name == "findShortestPath" {
@@ -1029,7 +1025,7 @@ fn dispatch_process_executor_method(
args: &[PluginValue],
out_params: &mut IndexMap<u32, PluginValue>,
) -> Result<PluginValue, PhpThrow> {
- let failed = |error: anyhow::Error| runtime_throw(format!("{method_name} failed: {error:#}"));
+ let failed = |error: anyhow::Error| error_throw(&format!("{method_name} failed"), &error);
let cwd_arg = |position: usize| -> Result<Option<String>, PhpThrow> {
match args.get(position) {
None | Some(PluginValue::Null) => Ok(None),
@@ -1334,11 +1330,9 @@ fn dispatch_repository_method(
match method_name {
"hasPackage" => {
let package = arg::<PackageInterfaceHandle>(method_name, args, 0)?;
- let has = repository.has_package(package).map_err(|error| {
- // TODO(plugin): the original exception class is collapsed to RuntimeException
- // on this side of the boundary.
- runtime_throw(format!("hasPackage failed over RPC: {error}"))
- })?;
+ let has = repository
+ .has_package(package)
+ .map_err(|error| error_throw("hasPackage failed over RPC", &error))?;
Ok(has.to_plugin_value())
}
"addPackage" | "removePackage" => {
@@ -1356,19 +1350,15 @@ fn dispatch_repository_method(
} else {
writable.remove_package(package)
};
- outcome.map_err(|error| {
- // TODO(plugin): the original exception class is collapsed to RuntimeException
- // on this side of the boundary.
- runtime_throw(format!("{method_name} failed over RPC: {error}"))
- })?;
+ outcome
+ .map_err(|error| error_throw(&format!("{method_name} failed over RPC"), &error))?;
Ok(PluginValue::Null)
}
"getPackages" => {
- let packages = repository.borrow_mut().get_packages().map_err(|error| {
- // TODO(plugin): the original exception class is collapsed to RuntimeException
- // on this side of the boundary.
- runtime_throw(format!("getPackages failed over RPC: {error}"))
- })?;
+ let packages = repository
+ .borrow_mut()
+ .get_packages()
+ .map_err(|error| error_throw("getPackages failed over RPC", &error))?;
let mut items = Vec::with_capacity(packages.len());
for package in packages {
items.push(package_handle_value(package.as_rc()));
@@ -1932,7 +1922,7 @@ fn dispatch_package_method(
.borrow_mut()
.as_package_interface_mut()
.set_repository(repository)
- .map_err(|error| runtime_throw(format!("setRepository failed: {error}")))?;
+ .map_err(|error| error_throw("setRepository failed", &error))?;
return Ok(PluginValue::Null);
}
"setTransportOptions" => {
@@ -2429,7 +2419,70 @@ fn runtime_throw(message: String) -> PhpThrow {
exception_class: "RuntimeException".to_string(),
message,
code: 0,
+ properties: Box::new(IndexMap::new()),
+ }
+}
+
+/// The `Throw` a failed Rust-side call crosses the boundary as. An error carrying a ported PHP
+/// exception keeps that exception's class, code and declared state, so a plugin catches what it
+/// would catch under Composer; one carrying no exception keeps the `RuntimeException` shape,
+/// with `context` naming the call that failed.
+fn error_throw(context: &str, error: &anyhow::Error) -> PhpThrow {
+ let Some(exception) = AnyThrowable::of(error.as_ref()) else {
+ return runtime_throw(format!("{context}: {error:#}"));
+ };
+ PhpThrow {
+ exception_class: exception.php_class_name(),
+ message: exception.get_message().to_string(),
+ code: exception.get_code(),
+ properties: Box::new(throwable_properties(error)),
+ }
+}
+
+/// The state a ported exception carries beyond `message` and `code`, keyed by the property names
+/// its PHP class declares. The child revives them onto the instance it rebuilds.
+///
+/// TODO(plugin): only `TransportException` is projected. Every other exception with state of its
+/// own (`InvalidPackageException`, `JsonValidationException`, `CommandNotFoundException`,
+/// `ProcessSignaledException`, `SolverProblemsException`) crosses with message and code alone.
+fn throwable_properties(error: &anyhow::Error) -> IndexMap<String, PluginValue> {
+ let mut properties = IndexMap::new();
+ if let Some(exception) = error.catch::<TransportException>() {
+ properties.insert(
+ "headers".to_string(),
+ match exception.get_headers() {
+ Some(headers) => {
+ PluginValue::List(headers.iter().cloned().map(PluginValue::string).collect())
+ }
+ None => PluginValue::Null,
+ },
+ );
+ properties.insert(
+ "response".to_string(),
+ match exception.get_response() {
+ Some(response) => PluginValue::string(response),
+ None => PluginValue::Null,
+ },
+ );
+ properties.insert(
+ "statusCode".to_string(),
+ match exception.get_status_code() {
+ Some(status_code) => PluginValue::Int(status_code),
+ None => PluginValue::Null,
+ },
+ );
+ properties.insert(
+ "responseInfo".to_string(),
+ PluginValue::List(
+ exception
+ .get_response_info()
+ .iter()
+ .map(PluginValue::from_php_mixed)
+ .collect(),
+ ),
+ );
}
+ properties
}
/// `PluginInterface` adapter for a plugin entity living in the PHP child process: every
diff --git a/crates/shirabe/src/plugin/php_plugin_value.rs b/crates/shirabe/src/plugin/php_plugin_value.rs
index a61d4873..cb9b990e 100644
--- a/crates/shirabe/src/plugin/php_plugin_value.rs
+++ b/crates/shirabe/src/plugin/php_plugin_value.rs
@@ -44,6 +44,7 @@ fn throw(message: String) -> PhpThrow {
exception_class: "RuntimeException".to_string(),
message,
code: 0,
+ properties: Box::new(indexmap::IndexMap::new()),
}
}
diff --git a/crates/shirabe/tests/plugin/e2e_exception_test.rs b/crates/shirabe/tests/plugin/e2e_exception_test.rs
new file mode 100644
index 00000000..ddbd1cf8
--- /dev/null
+++ b/crates/shirabe/tests/plugin/e2e_exception_test.rs
@@ -0,0 +1,79 @@
+//! Exception fidelity E2E check: upstream Composer and Shirabe each install a fixture project
+//! whose plugin catches the exceptions a Composer service raises at it and writes what it saw to
+//! a trace file. Upstream has no test that inspects an exception from plugin code, so the whole
+//! fixture is Shirabe-authored (`fixtures/e2e-exception/`) and nothing has to be fetched; the
+//! test skips only while the PHP runtime or the Composer checkout is missing.
+
+use crate::e2e_extension_installer_test::{copy_dir, upstream_composer_bin};
+use crate::php_worker::{lock_php_worker, php_runtime_available};
+use std::path::{Path, PathBuf};
+use tempfile::TempDir;
+
+fn fixture_dir() -> PathBuf {
+ Path::new(env!("CARGO_MANIFEST_DIR")).join("tests/plugin/fixtures/e2e-exception")
+}
+
+struct Run {
+ exit_code: i32,
+ trace: String,
+}
+
+/// Runs `install` in a fresh copy of the fixture and returns the exit code with the plugin's trace.
+fn install(program: &str, prefix_args: &[&str]) -> Run {
+ let work = TempDir::new().unwrap();
+ copy_dir(&fixture_dir(), work.path());
+ let project = work.path().join("project");
+ let output = std::process::Command::new(program)
+ .args(prefix_args)
+ .arg("install")
+ .current_dir(&project)
+ .env("COMPOSER_HOME", work.path().join("home"))
+ .env("COMPOSER_CACHE_DIR", work.path().join("cache"))
+ .env("COMPOSER_NO_INTERACTION", "1")
+ .env("COLUMNS", "120")
+ .env("LINES", "30")
+ .output()
+ .unwrap();
+ Run {
+ exit_code: output.status.code().unwrap_or(-1),
+ trace: std::fs::read_to_string(project.join("exception-trace.txt")).unwrap_or_default(),
+ }
+}
+
+#[test]
+fn test_exceptions_reach_a_plugin_as_their_own_class() {
+ if !php_runtime_available() {
+ return;
+ }
+ let Some(composer_bin) = upstream_composer_bin() else {
+ return;
+ };
+ let _worker = lock_php_worker();
+ let composer_bin = composer_bin.to_str().unwrap().to_string();
+
+ let upstream = install("php", &[composer_bin.as_str()]);
+ let shirabe = install(env!("CARGO_BIN_EXE_shirabe"), &[]);
+
+ assert_eq!(0, upstream.exit_code, "upstream install must succeed");
+ assert_eq!(upstream.exit_code, shirabe.exit_code);
+ assert_eq!(upstream.trace, shirabe.trace);
+
+ // Pinned as well as compared, so a run where neither side wrote a trace cannot pass. The
+ // class names and the two hierarchy answers are the evidence that the exception crossed as
+ // itself rather than as one collapsed shape.
+ assert_eq!(
+ "\
+event=post-update-cmd
+findShortestPath class=\"InvalidArgumentException\" \
+message=\"$from (relative) and $to (\\/absolute) must be absolute paths.\" code=0 \
+logic=true runtime=false
+findShortestPathCode class=\"InvalidArgumentException\" \
+message=\"$from (\\/absolute) and $to (relative) must be absolute paths.\" code=0 \
+logic=true runtime=false
+ensureDirectoryExists class=\"RuntimeException\" \
+message=\"not-a-directory exists and is not a directory.\" code=0 logic=false runtime=true
+catch-clause=InvalidArgumentException
+",
+ upstream.trace
+ );
+}
diff --git a/crates/shirabe/tests/plugin/fixtures/e2e-exception/plugin/composer.json b/crates/shirabe/tests/plugin/fixtures/e2e-exception/plugin/composer.json
new file mode 100644
index 00000000..4bc436ec
--- /dev/null
+++ b/crates/shirabe/tests/plugin/fixtures/e2e-exception/plugin/composer.json
@@ -0,0 +1,17 @@
+{
+ "name": "shirabe-test/exception-probe",
+ "version": "1.0.0",
+ "type": "composer-plugin",
+ "description": "Fixture plugin recording the exceptions a Composer service raises at it.",
+ "autoload": {
+ "psr-4": {
+ "ShirabeTest\\Exception\\": "src/"
+ }
+ },
+ "require": {
+ "composer-plugin-api": "^2.0"
+ },
+ "extra": {
+ "class": "ShirabeTest\\Exception\\Plugin"
+ }
+}
diff --git a/crates/shirabe/tests/plugin/fixtures/e2e-exception/plugin/src/Plugin.php b/crates/shirabe/tests/plugin/fixtures/e2e-exception/plugin/src/Plugin.php
new file mode 100644
index 00000000..547f4fbb
--- /dev/null
+++ b/crates/shirabe/tests/plugin/fixtures/e2e-exception/plugin/src/Plugin.php
@@ -0,0 +1,92 @@
+<?php
+
+namespace ShirabeTest\Exception;
+
+use Composer\Composer;
+use Composer\EventDispatcher\EventSubscriberInterface;
+use Composer\IO\IOInterface;
+use Composer\Plugin\PluginInterface;
+use Composer\Script\Event;
+use Composer\Script\ScriptEvents;
+use Composer\Util\Filesystem;
+
+/**
+ * Records what a plugin sees when a Composer service raises an exception at it: the class it was
+ * thrown as, its message and code, whether it is still an instance of the parent classes the real
+ * hierarchy gives it, and whether a `catch` naming that class matches. Composer plugins branch on
+ * the exception class rather than on its message, so the whole surface is compared line by line
+ * between implementations.
+ */
+class Plugin implements PluginInterface, EventSubscriberInterface
+{
+ public function activate(Composer $composer, IOInterface $io): void
+ {
+ }
+
+ public function deactivate(Composer $composer, IOInterface $io): void
+ {
+ }
+
+ public function uninstall(Composer $composer, IOInterface $io): void
+ {
+ }
+
+ public static function getSubscribedEvents()
+ {
+ // Whether an install resolves or replays a lock file decides which of the two fires, so
+ // both are subscribed and the trace records the one that ran.
+ return [
+ ScriptEvents::POST_INSTALL_CMD => 'onPostCommand',
+ ScriptEvents::POST_UPDATE_CMD => 'onPostCommand',
+ ];
+ }
+
+ public function onPostCommand(Event $event): void
+ {
+ $filesystem = new Filesystem();
+ $lines = ['event=' . $event->getName()];
+
+ $lines[] = 'findShortestPath ' . $this->describe(static function () use ($filesystem): void {
+ $filesystem->findShortestPath('relative', '/absolute');
+ });
+ $lines[] = 'findShortestPathCode ' . $this->describe(static function () use ($filesystem): void {
+ $filesystem->findShortestPathCode('/absolute', 'relative');
+ });
+
+ // A different class through the same seam, so the trace shows the class travelling rather
+ // than every failure arriving under one name.
+ file_put_contents('not-a-directory', '');
+ $lines[] = 'ensureDirectoryExists ' . $this->describe(static function () use ($filesystem): void {
+ $filesystem->ensureDirectoryExists('not-a-directory');
+ });
+
+ // get_class() answers for the object; a catch clause answers for the class hierarchy the
+ // child holds, which is what plugin code is actually written against.
+ try {
+ $filesystem->findShortestPath('relative', '/absolute');
+ $caught = 'nothing-thrown';
+ } catch (\InvalidArgumentException $e) {
+ $caught = 'InvalidArgumentException';
+ } catch (\Throwable $e) {
+ $caught = 'unmatched:' . \get_class($e);
+ }
+ $lines[] = 'catch-clause=' . $caught;
+
+ file_put_contents('exception-trace.txt', implode("\n", $lines) . "\n");
+ }
+
+ private function describe(callable $call): string
+ {
+ try {
+ $call();
+
+ return 'class=none';
+ } catch (\Throwable $e) {
+ return 'class=' . json_encode(\get_class($e))
+ . ' message=' . json_encode($e->getMessage())
+ . ' code=' . json_encode($e->getCode())
+ . ' logic=' . json_encode($e instanceof \LogicException)
+ . ' runtime=' . json_encode($e instanceof \RuntimeException);
+ }
+ }
+}
diff --git a/crates/shirabe/tests/plugin/fixtures/e2e-exception/project/composer.json b/crates/shirabe/tests/plugin/fixtures/e2e-exception/project/composer.json
new file mode 100644
index 00000000..da06cc93
--- /dev/null
+++ b/crates/shirabe/tests/plugin/fixtures/e2e-exception/project/composer.json
@@ -0,0 +1,24 @@
+{
+ "name": "shirabe/e2e-exception",
+ "description": "E2E fixture project: record the exceptions a plugin catches from Composer services.",
+ "repositories": [
+ {
+ "type": "path",
+ "url": "../plugin",
+ "options": {
+ "symlink": false
+ }
+ },
+ {
+ "packagist.org": false
+ }
+ ],
+ "require": {
+ "shirabe-test/exception-probe": "1.0.0"
+ },
+ "config": {
+ "allow-plugins": {
+ "shirabe-test/exception-probe": true
+ }
+ }
+}
diff --git a/crates/shirabe/tests/plugin/main.rs b/crates/shirabe/tests/plugin/main.rs
index 35f5beb5..3ef3f647 100644
--- a/crates/shirabe/tests/plugin/main.rs
+++ b/crates/shirabe/tests/plugin/main.rs
@@ -7,6 +7,7 @@ mod php_worker;
mod alias_package_test;
mod e2e_command_provider_test;
+mod e2e_exception_test;
mod e2e_extension_installer_test;
mod e2e_installer_test;
mod e2e_installers_test;