use super::exit_status::ExitStatus;
use super::project_file_edit::ProjectFileEdit;
use super::standard_error::StandardError;
use super::temporary_directory::TemporaryDirectory;
use super::terminal::Terminal;
use crate::build::{CrateResolver, ResolveError, ResolvedCrate};
use crate::project::{CrateDependency, CrateEntry, Section};
pub struct AddCommand {
name: String,
features: Vec<String>,
}
struct CrateNaming;
impl AddCommand {
const COMMAND: &str = "add";
pub fn new(name: String, features: Vec<String>) -> Self {
Self { name, features }
}
pub fn run(self, terminal: &mut Terminal) -> ExitStatus {
match self.add(terminal) {
Ok(()) => ExitStatus::Success,
Err(status) => status,
}
}
fn add(&self, terminal: &Terminal) -> Result<(), ExitStatus> {
self.check_names()?;
let edit = ProjectFileEdit::of_working_directory(terminal, Self::COMMAND)?;
Self::refuse_path(edit.listed_crate(&self.name))?;
let resolved = self.resolved()?;
let listed = edit.listed_crate(&resolved.name);
Self::refuse_path(listed)?;
let entry = CrateEntry {
features: self.features_with(listed.map(|dependency| dependency.features.clone())),
name: resolved.name,
version: resolved.version,
};
edit.apply(terminal, |editor| {
Some(editor.with_crate(Section::Dependencies, &entry))
})?;
Ok(())
}
fn check_names(&self) -> Result<(), ExitStatus> {
if !CrateNaming::is_crate_name(&self.name) {
return Err(Self::report_usage(&format!(
"`{}` is not a crate name",
self.name
)));
}
match self
.features
.iter()
.find(|feature| !CrateNaming::is_feature_name(feature))
{
Some(feature) => Err(Self::report_usage(&format!(
"`{feature}` is not a feature name"
))),
None => Ok(()),
}
}
fn refuse_path(listed: Option<&CrateDependency>) -> Result<(), ExitStatus> {
let Some(dependency) = listed.filter(|dependency| dependency.path.is_some()) else {
return Ok(());
};
Err(Self::report_usage(&format!(
"`{name}` is listed with `:path`\nhelp: run `knave remove {name}` first to switch it to a version",
name = dependency.name
)))
}
fn features_with(&self, listed: Option<Vec<String>>) -> Vec<String> {
let mut features = listed.unwrap_or_default();
for feature in &self.features {
if !features.contains(feature) {
features.push(feature.clone());
}
}
features
}
fn resolved(&self) -> Result<ResolvedCrate, ExitStatus> {
TemporaryDirectory::create()
.map_err(ResolveError::Unwritable)
.and_then(|scratch| {
CrateResolver::new(scratch.path().to_path_buf()).resolve(&self.name, &self.features)
})
.map_err(|error| match error {
ResolveError::CargoMissing(error) => Self::report_environment(&format!(
"cannot run cargo, which finds the version of a crate to add: {error}"
)),
ResolveError::Unwritable(error) => Self::report_environment(&format!(
"cannot write a scratch manifest for cargo: {error}"
)),
ResolveError::Cargo(message) => Self::report_cargo(&message),
})
}
fn report_usage(message: &str) -> ExitStatus {
StandardError::write_line(format_args!("error: {message}"));
ExitStatus::UsageError
}
fn report_cargo(message: &str) -> ExitStatus {
StandardError::write_line(format_args!("{message}"));
ExitStatus::Environment
}
fn report_environment(message: &str) -> ExitStatus {
StandardError::write_line(format_args!("error: {message}"));
ExitStatus::Environment
}
}
impl CrateNaming {
const NAME_MARKS: [char; 2] = ['-', '_'];
const FEATURE_MARKS: [char; 4] = ['-', '_', '+', '.'];
const DEPENDENCY_FEATURE: char = '/';
const FEATURE_START: char = '_';
fn is_crate_name(name: &str) -> bool {
name.starts_with(|first: char| first.is_ascii_alphabetic())
&& name.chars().all(|character| {
character.is_ascii_alphanumeric() || Self::NAME_MARKS.contains(&character)
})
}
fn is_feature_name(feature: &str) -> bool {
let parts: Vec<&str> = feature.split(Self::DEPENDENCY_FEATURE).collect();
parts.len() <= 2 && parts.iter().all(|part| Self::is_feature_part(part))
}
fn is_feature_part(part: &str) -> bool {
part.starts_with(|first: char| {
first.is_ascii_alphanumeric() || first == Self::FEATURE_START
}) && part.chars().all(|character| {
character.is_ascii_alphanumeric() || Self::FEATURE_MARKS.contains(&character)
})
}
}