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tests.nixpkgs-check-by-name: Redesign and document check_result functions

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This commit is contained in:
Silvan Mosberger 2023-10-23 23:54:02 +02:00
parent 3d60440799
commit eac0b69063
5 changed files with 147 additions and 125 deletions
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104
pkgs/test/nixpkgs-check-by-name/src/check_result.rs
View file

@ -1,13 +1,17 @@
use crate::utils::PACKAGE_NIX_FILENAME;
use itertools::concat;
use itertools::{Either, Itertools};
use itertools::{
Either,
Either::{Left, Right},
Itertools,
};
use rnix::parser::ParseError;
use std::ffi::OsString;
use std::fmt;
use std::io;
use std::path::PathBuf;
pub enum CheckError {
pub enum CheckProblem {
ShardNonDir {
relative_shard_path: PathBuf,
},
@ -90,97 +94,97 @@ pub enum CheckError {
},
}
impl CheckError {
impl CheckProblem {
pub fn into_result<A>(self) -> CheckResult<A> {
Ok(Either::Left(vec![self]))
Ok(Left(vec![self]))
}
}
impl fmt::Display for CheckError {
impl fmt::Display for CheckProblem {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
CheckError::ShardNonDir { relative_shard_path } =>
CheckProblem::ShardNonDir { relative_shard_path } =>
write!(
f,
"{}: This is a file, but it should be a directory.",
relative_shard_path.display(),
),
CheckError::InvalidShardName { relative_shard_path, shard_name } =>
CheckProblem::InvalidShardName { relative_shard_path, shard_name } =>
write!(
f,
"{}: Invalid directory name \"{shard_name}\", must be at most 2 ASCII characters consisting of a-z, 0-9, \"-\" or \"_\".",
relative_shard_path.display()
),
CheckError::PackageNonDir { relative_package_dir } =>
CheckProblem::PackageNonDir { relative_package_dir } =>
write!(
f,
"{}: This path is a file, but it should be a directory.",
relative_package_dir.display(),
),
CheckError::CaseSensitiveDuplicate { relative_shard_path, first, second } =>
CheckProblem::CaseSensitiveDuplicate { relative_shard_path, first, second } =>
write!(
f,
"{}: Duplicate case-sensitive package directories {first:?} and {second:?}.",
relative_shard_path.display(),
),
CheckError::InvalidPackageName { relative_package_dir, package_name } =>
CheckProblem::InvalidPackageName { relative_package_dir, package_name } =>
write!(
f,
"{}: Invalid package directory name \"{package_name}\", must be ASCII characters consisting of a-z, A-Z, 0-9, \"-\" or \"_\".",
relative_package_dir.display(),
),
CheckError::IncorrectShard { relative_package_dir, correct_relative_package_dir } =>
CheckProblem::IncorrectShard { relative_package_dir, correct_relative_package_dir } =>
write!(
f,
"{}: Incorrect directory location, should be {} instead.",
relative_package_dir.display(),
correct_relative_package_dir.display(),
),
CheckError::PackageNixNonExistent { relative_package_dir } =>
CheckProblem::PackageNixNonExistent { relative_package_dir } =>
write!(
f,
"{}: Missing required \"{PACKAGE_NIX_FILENAME}\" file.",
relative_package_dir.display(),
),
CheckError::PackageNixDir { relative_package_dir } =>
CheckProblem::PackageNixDir { relative_package_dir } =>
write!(
f,
"{}: \"{PACKAGE_NIX_FILENAME}\" must be a file.",
relative_package_dir.display(),
),
CheckError::UndefinedAttr { relative_package_file, package_name } =>
CheckProblem::UndefinedAttr { relative_package_file, package_name } =>
write!(
f,
"pkgs.{package_name}: This attribute is not defined but it should be defined automatically as {}",
relative_package_file.display()
),
CheckError::WrongCallPackage { relative_package_file, package_name } =>
CheckProblem::WrongCallPackage { relative_package_file, package_name } =>
write!(
f,
"pkgs.{package_name}: This attribute is manually defined (most likely in pkgs/top-level/all-packages.nix), which is only allowed if the definition is of the form `pkgs.callPackage {} {{ ... }}` with a non-empty second argument.",
relative_package_file.display()
),
CheckError::NonDerivation { relative_package_file, package_name } =>
CheckProblem::NonDerivation { relative_package_file, package_name } =>
write!(
f,
"pkgs.{package_name}: This attribute defined by {} is not a derivation",
relative_package_file.display()
),
CheckError::OutsideSymlink { relative_package_dir, subpath } =>
CheckProblem::OutsideSymlink { relative_package_dir, subpath } =>
write!(
f,
"{}: Path {} is a symlink pointing to a path outside the directory of that package.",
relative_package_dir.display(),
subpath.display(),
),
CheckError::UnresolvableSymlink { relative_package_dir, subpath, io_error } =>
CheckProblem::UnresolvableSymlink { relative_package_dir, subpath, io_error } =>
write!(
f,
"{}: Path {} is a symlink which cannot be resolved: {io_error}.",
relative_package_dir.display(),
subpath.display(),
),
CheckError::CouldNotParseNix { relative_package_dir, subpath, error } =>
CheckProblem::CouldNotParseNix { relative_package_dir, subpath, error } =>
write!(
f,
"{}: File {} could not be parsed by rnix: {}",
@ -188,7 +192,7 @@ impl fmt::Display for CheckError {
subpath.display(),
error,
),
CheckError::PathInterpolation { relative_package_dir, subpath, line, text } =>
CheckProblem::PathInterpolation { relative_package_dir, subpath, line, text } =>
write!(
f,
"{}: File {} at line {line} contains the path expression \"{}\", which is not yet supported and may point outside the directory of that package.",
@ -196,7 +200,7 @@ impl fmt::Display for CheckError {
subpath.display(),
text
),
CheckError::SearchPath { relative_package_dir, subpath, line, text } =>
CheckProblem::SearchPath { relative_package_dir, subpath, line, text } =>
write!(
f,
"{}: File {} at line {line} contains the nix search path expression \"{}\" which may point outside the directory of that package.",
@ -204,7 +208,7 @@ impl fmt::Display for CheckError {
subpath.display(),
text
),
CheckError::OutsidePathReference { relative_package_dir, subpath, line, text } =>
CheckProblem::OutsidePathReference { relative_package_dir, subpath, line, text } =>
write!(
f,
"{}: File {} at line {line} contains the path expression \"{}\" which may point outside the directory of that package.",
@ -212,7 +216,7 @@ impl fmt::Display for CheckError {
subpath.display(),
text,
),
CheckError::UnresolvablePathReference { relative_package_dir, subpath, line, text, io_error } =>
CheckProblem::UnresolvablePathReference { relative_package_dir, subpath, line, text, io_error } =>
write!(
f,
"{}: File {} at line {line} contains the path expression \"{}\" which cannot be resolved: {io_error}.",
@ -224,27 +228,44 @@ impl fmt::Display for CheckError {
}
}
pub fn pass<A>(value: A) -> CheckResult<A> {
Ok(Either::Right(value))
/// A type alias representing the result of a check, either:
/// - Err(anyhow::Error): A fatal failure, typically I/O errors.
/// Such failures are not caused by the files in Nixpkgs.
/// This hints at a bug in the code or a problem with the deployment.
/// - Ok(Left(Vec<CheckProblem>)): A non-fatal problem with the Nixpkgs files.
/// Further checks can be run even with this result type.
/// Such problems can be fixed by changing the Nixpkgs files.
/// - Ok(Right(A)): A successful (potentially intermediate) result with an arbitrary value.
/// No fatal errors have occurred and no problems have been found with Nixpkgs.
pub type CheckResult<A> = anyhow::Result<Either<Vec<CheckProblem>, A>>;
/// Map a `CheckResult<I>` to a `CheckResult<O>` by applying a function to the
/// potentially contained value in case of success.
pub fn map<I, O>(check_result: CheckResult<I>, f: impl FnOnce(I) -> O) -> CheckResult<O> {
Ok(check_result?.map_right(f))
}
pub type CheckResult<A> = anyhow::Result<Either<Vec<CheckError>, A>>;
/// Create a successfull `CheckResult<A>` from a value `A`.
pub fn ok<A>(value: A) -> CheckResult<A> {
Ok(Right(value))
}
pub fn sequence_check_results<A>(first: CheckResult<()>, second: CheckResult<A>) -> CheckResult<A> {
/// Combine two check results, both of which need to be successful for the return value to be successful.
/// The `CheckProblem`s of both sides are returned concatenated.
pub fn and<A>(first: CheckResult<()>, second: CheckResult<A>) -> CheckResult<A> {
match (first?, second?) {
(Either::Right(_), Either::Right(right_value)) => pass(right_value),
(Either::Left(errors), Either::Right(_)) => Ok(Either::Left(errors)),
(Either::Right(_), Either::Left(errors)) => Ok(Either::Left(errors)),
(Either::Left(errors_l), Either::Left(errors_r)) => {
Ok(Either::Left(concat([errors_l, errors_r])))
}
(Right(_), Right(right_value)) => Ok(Right(right_value)),
(Left(errors), Right(_)) => Ok(Left(errors)),
(Right(_), Left(errors)) => Ok(Left(errors)),
(Left(errors_l), Left(errors_r)) => Ok(Left(concat([errors_l, errors_r]))),
}
}
pub fn flatten_check_results<I, O>(
check_results: impl IntoIterator<Item = CheckResult<I>>,
value_transform: impl Fn(Vec<I>) -> O,
) -> CheckResult<O> {
/// Combine many checks results into a single one.
/// All given check results need to be successful in order for the returned check result to be successful,
/// in which case the returned check result value contains each a `Vec` of each individual result value.
/// The `CheckProblem`s of all results are returned concatenated.
pub fn sequence<A>(check_results: impl IntoIterator<Item = CheckResult<A>>) -> CheckResult<Vec<A>> {
let (errors, values): (Vec<_>, Vec<_>) = check_results
.into_iter()
.collect::<anyhow::Result<Vec<_>>>()?
@ -256,8 +277,13 @@ pub fn flatten_check_results<I, O>(
let flattened_errors = errors.into_iter().flatten().collect::<Vec<_>>();
if flattened_errors.is_empty() {
Ok(Either::Right(value_transform(values)))
Ok(Right(values))
} else {
Ok(Either::Left(flattened_errors))
Ok(Left(flattened_errors))
}
}
/// Like `sequence`, but replace the resulting value with ()
pub fn sequence_<A>(check_results: impl IntoIterator<Item = CheckResult<A>>) -> CheckResult<()> {
map(sequence(check_results), |_| ())
}

16
pkgs/test/nixpkgs-check-by-name/src/eval.rs
View file

@ -1,4 +1,5 @@
use crate::check_result::{flatten_check_results, pass, CheckError, CheckResult};
use crate::check_result;
use crate::check_result::{CheckProblem, CheckResult};
use crate::structure;
use crate::Version;
use std::path::Path;
@ -110,7 +111,7 @@ pub fn check_values(
String::from_utf8_lossy(&result.stdout)
))?;
let check_results = package_names.iter().map(|package_name| {
check_result::sequence_(package_names.iter().map(|package_name| {
let relative_package_file = structure::relative_file_for_package(package_name);
let absolute_package_file = nixpkgs_path.join(&relative_package_file);
@ -136,27 +137,26 @@ pub fn check_values(
};
if !valid {
CheckError::WrongCallPackage {
CheckProblem::WrongCallPackage {
relative_package_file: relative_package_file.clone(),
package_name: package_name.clone(),
}
.into_result()
} else if !attribute_info.is_derivation {
CheckError::NonDerivation {
CheckProblem::NonDerivation {
relative_package_file: relative_package_file.clone(),
package_name: package_name.clone(),
}
.into_result()
} else {
pass(())
check_result::ok(())
}
} else {
CheckError::UndefinedAttr {
CheckProblem::UndefinedAttr {
relative_package_file: relative_package_file.clone(),
package_name: package_name.clone(),
}
.into_result()
}
});
flatten_check_results(check_results, |_| ())
}))
}

9
pkgs/test/nixpkgs-check-by-name/src/main.rs
View file

@ -6,11 +6,12 @@ mod utils;
use crate::structure::check_structure;
use anyhow::Context;
use check_result::pass;
use clap::{Parser, ValueEnum};
use colored::Colorize;
use itertools::Either;
use itertools::Either::{Left, Right};
use itertools::{
Either,
Either::{Left, Right},
};
use std::io;
use std::path::{Path, PathBuf};
use std::process::ExitCode;
@ -84,7 +85,7 @@ pub fn check_nixpkgs<W: io::Write>(
"Given Nixpkgs path does not contain a {} subdirectory, no check necessary.",
utils::BASE_SUBPATH
);
pass(())
check_result::ok(())
} else {
match check_structure(&nixpkgs_path)? {
Left(errors) => Ok(Left(errors)),

37
pkgs/test/nixpkgs-check-by-name/src/references.rs
View file

@ -1,4 +1,5 @@
use crate::check_result::{flatten_check_results, pass, CheckError, CheckResult};
use crate::check_result;
use crate::check_result::{CheckProblem, CheckResult};
use crate::utils;
use crate::utils::LineIndex;
@ -46,16 +47,16 @@ fn check_path(context: &PackageContext, subpath: &Path) -> CheckResult<()> {
// No need to handle the case of it being inside the directory, since we scan through the
// entire directory recursively anyways
if let Err(_prefix_error) = target.strip_prefix(context.absolute_package_dir) {
CheckError::OutsideSymlink {
CheckProblem::OutsideSymlink {
relative_package_dir: context.relative_package_dir.clone(),
subpath: subpath.to_path_buf(),
}
.into_result()
} else {
pass(())
check_result::ok(())
}
}
Err(io_error) => CheckError::UnresolvableSymlink {
Err(io_error) => CheckProblem::UnresolvableSymlink {
relative_package_dir: context.relative_package_dir.clone(),
subpath: subpath.to_path_buf(),
io_error,
@ -64,12 +65,11 @@ fn check_path(context: &PackageContext, subpath: &Path) -> CheckResult<()> {
}
} else if path.is_dir() {
// Recursively check each entry
let check_results = utils::read_dir_sorted(&path)?.into_iter().map(|entry| {
check_result::sequence_(utils::read_dir_sorted(&path)?.into_iter().map(|entry| {
let entry_subpath = subpath.join(entry.file_name());
check_path(context, &entry_subpath)
.context(format!("Error while recursing into {}", subpath.display()))
});
flatten_check_results(check_results, |_| ())
}))
} else if path.is_file() {
// Only check Nix files
if let Some(ext) = path.extension() {
@ -79,10 +79,10 @@ fn check_path(context: &PackageContext, subpath: &Path) -> CheckResult<()> {
subpath.display()
))
} else {
pass(())
check_result::ok(())
}
} else {
pass(())
check_result::ok(())
}
} else {
// This should never happen, git doesn't support other file types
@ -104,7 +104,7 @@ fn check_nix_file(context: &PackageContext, subpath: &Path) -> CheckResult<()> {
let root = Root::parse(&contents);
if let Some(error) = root.errors().first() {
return CheckError::CouldNotParseNix {
return CheckProblem::CouldNotParseNix {
relative_package_dir: context.relative_package_dir.clone(),
subpath: subpath.to_path_buf(),
error: error.clone(),
@ -114,17 +114,17 @@ fn check_nix_file(context: &PackageContext, subpath: &Path) -> CheckResult<()> {
let line_index = LineIndex::new(&contents);
let check_results = root.syntax().descendants().map(|node| {
check_result::sequence_(root.syntax().descendants().map(|node| {
let text = node.text().to_string();
let line = line_index.line(node.text_range().start().into());
if node.kind() != NODE_PATH {
// We're only interested in Path expressions
pass(())
check_result::ok(())
} else if node.children().count() != 0 {
// Filters out ./foo/${bar}/baz
// TODO: We can just check ./foo
CheckError::PathInterpolation {
CheckProblem::PathInterpolation {
relative_package_dir: context.relative_package_dir.clone(),
subpath: subpath.to_path_buf(),
line,
@ -133,7 +133,7 @@ fn check_nix_file(context: &PackageContext, subpath: &Path) -> CheckResult<()> {
.into_result()
} else if text.starts_with('<') {
// Filters out search paths like <nixpkgs>
CheckError::SearchPath {
CheckProblem::SearchPath {
relative_package_dir: context.relative_package_dir.clone(),
subpath: subpath.to_path_buf(),
line,
@ -149,7 +149,7 @@ fn check_nix_file(context: &PackageContext, subpath: &Path) -> CheckResult<()> {
// No need to handle the case of it being inside the directory, since we scan through the
// entire directory recursively anyways
if let Err(_prefix_error) = target.strip_prefix(context.absolute_package_dir) {
CheckError::OutsidePathReference {
CheckProblem::OutsidePathReference {
relative_package_dir: context.relative_package_dir.clone(),
subpath: subpath.to_path_buf(),
line,
@ -157,10 +157,10 @@ fn check_nix_file(context: &PackageContext, subpath: &Path) -> CheckResult<()> {
}
.into_result()
} else {
pass(())
check_result::ok(())
}
}
Err(e) => CheckError::UnresolvablePathReference {
Err(e) => CheckProblem::UnresolvablePathReference {
relative_package_dir: context.relative_package_dir.clone(),
subpath: subpath.to_path_buf(),
line,
@ -170,6 +170,5 @@ fn check_nix_file(context: &PackageContext, subpath: &Path) -> CheckResult<()> {
.into_result(),
}
}
});
flatten_check_results(check_results, |_| ())
}))
}

106
pkgs/test/nixpkgs-check-by-name/src/structure.rs
View file

@ -1,6 +1,5 @@
use crate::check_result::{
flatten_check_results, pass, sequence_check_results, CheckError, CheckResult,
};
use crate::check_result;
use crate::check_result::{CheckProblem, CheckResult};
use crate::references;
use crate::utils;
use crate::utils::{BASE_SUBPATH, PACKAGE_NIX_FILENAME};
@ -36,7 +35,7 @@ pub fn relative_file_for_package(package_name: &str) -> PathBuf {
pub fn check_structure(path: &Path) -> CheckResult<Vec<String>> {
let base_dir = path.join(BASE_SUBPATH);
let check_results = utils::read_dir_sorted(&base_dir)?
let shard_results = utils::read_dir_sorted(&base_dir)?
.into_iter()
.map(|shard_entry| {
let shard_path = shard_entry.path();
@ -45,35 +44,35 @@ pub fn check_structure(path: &Path) -> CheckResult<Vec<String>> {
if shard_name == "README.md" {
// README.md is allowed to be a file and not checked
pass(vec![])
check_result::ok(vec![])
} else if !shard_path.is_dir() {
CheckError::ShardNonDir {
CheckProblem::ShardNonDir {
relative_shard_path: relative_shard_path.clone(),
}
.into_result()
// we can't check for any other errors if it's a file, since there's no subdirectories to check
} else {
let shard_name_valid = SHARD_NAME_REGEX.is_match(&shard_name);
let check_result = if !shard_name_valid {
CheckError::InvalidShardName {
let result = if !shard_name_valid {
CheckProblem::InvalidShardName {
relative_shard_path: relative_shard_path.clone(),
shard_name: shard_name.clone(),
}
.into_result()
} else {
pass(())
check_result::ok(())
};
let entries = utils::read_dir_sorted(&shard_path)?;
let duplicate_check_results = entries
let duplicate_results = entries
.iter()
.zip(entries.iter().skip(1))
.filter(|(l, r)| {
l.file_name().to_ascii_lowercase() == r.file_name().to_ascii_lowercase()
})
.map(|(l, r)| {
CheckError::CaseSensitiveDuplicate {
CheckProblem::CaseSensitiveDuplicate {
relative_shard_path: relative_shard_path.clone(),
first: l.file_name(),
second: r.file_name(),
@ -81,90 +80,87 @@ pub fn check_structure(path: &Path) -> CheckResult<Vec<String>> {
.into_result::<()>()
});
let check_result = sequence_check_results(
check_result,
flatten_check_results(duplicate_check_results, |_| ()),
);
let result = check_result::and(result, check_result::sequence_(duplicate_results));
let check_results = entries.into_iter().map(|package_entry| {
let package_results = entries.into_iter().map(|package_entry| {
let package_path = package_entry.path();
let package_name = package_entry.file_name().to_string_lossy().into_owned();
let relative_package_dir =
PathBuf::from(format!("{BASE_SUBPATH}/{shard_name}/{package_name}"));
if !package_path.is_dir() {
CheckError::PackageNonDir {
CheckProblem::PackageNonDir {
relative_package_dir: relative_package_dir.clone(),
}
.into_result()
} else {
let package_name_valid = PACKAGE_NAME_REGEX.is_match(&package_name);
let name_check_result = if !package_name_valid {
CheckError::InvalidPackageName {
let result = if !package_name_valid {
CheckProblem::InvalidPackageName {
relative_package_dir: relative_package_dir.clone(),
package_name: package_name.clone(),
}
.into_result()
} else {
pass(())
check_result::ok(())
};
let correct_relative_package_dir = relative_dir_for_package(&package_name);
let shard_check_result =
let result = check_result::and(
result,
if relative_package_dir != correct_relative_package_dir {
// Only show this error if we have a valid shard and package name
// Because if one of those is wrong, you should fix that first
if shard_name_valid && package_name_valid {
CheckError::IncorrectShard {
CheckProblem::IncorrectShard {
relative_package_dir: relative_package_dir.clone(),
correct_relative_package_dir: correct_relative_package_dir
.clone(),
}
.into_result()
} else {
pass(())
check_result::ok(())
}
} else {
pass(())
};
let package_nix_path = package_path.join(PACKAGE_NIX_FILENAME);
let package_nix_check_result = if !package_nix_path.exists() {
CheckError::PackageNixNonExistent {
relative_package_dir: relative_package_dir.clone(),
}
.into_result()
} else if package_nix_path.is_dir() {
CheckError::PackageNixDir {
relative_package_dir: relative_package_dir.clone(),
}
.into_result()
} else {
pass(())
};
let reference_check_result = references::check_references(
&relative_package_dir,
&path.join(&relative_package_dir),
check_result::ok(())
},
);
flatten_check_results(
[
name_check_result,
shard_check_result,
package_nix_check_result,
reference_check_result,
],
|_| package_name.clone(),
)
let package_nix_path = package_path.join(PACKAGE_NIX_FILENAME);
let result = check_result::and(
result,
if !package_nix_path.exists() {
CheckProblem::PackageNixNonExistent {
relative_package_dir: relative_package_dir.clone(),
}
.into_result()
} else if package_nix_path.is_dir() {
CheckProblem::PackageNixDir {
relative_package_dir: relative_package_dir.clone(),
}
.into_result()
} else {
check_result::ok(())
},
);
let result = check_result::and(
result,
references::check_references(
&relative_package_dir,
&path.join(&relative_package_dir),
),
);
check_result::map(result, |_| package_name.clone())
}
});
sequence_check_results(check_result, flatten_check_results(check_results, |x| x))
check_result::and(result, check_result::sequence(package_results))
}
});
flatten_check_results(check_results, |x| {
check_result::map(check_result::sequence(shard_results), |x| {
x.into_iter().flatten().collect::<Vec<_>>()
})
}