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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use std::path::PathBuf;
use deno_core::anyhow::Context;
use deno_core::error::AnyError;
use deno_core::parking_lot::Mutex;
use deno_core::parking_lot::MutexGuard;
use deno_runtime::deno_node::PackageJson;
use crate::args::ConfigFile;
use crate::cache;
use crate::util::fs::atomic_write_file_with_retries;
use crate::Flags;
use crate::args::DenoSubcommand;
use crate::args::InstallFlags;
use crate::args::InstallKind;
use deno_lockfile::Lockfile;
#[derive(Debug)]
pub struct CliLockfile {
lockfile: Mutex<Lockfile>,
pub filename: PathBuf,
}
pub struct Guard<'a, T> {
guard: MutexGuard<'a, T>,
}
impl<'a, T> std::ops::Deref for Guard<'a, T> {
type Target = T;
fn deref(&self) -> &Self::Target {
&self.guard
}
}
impl<'a, T> std::ops::DerefMut for Guard<'a, T> {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.guard
}
}
impl CliLockfile {
pub fn new(lockfile: Lockfile) -> Self {
let filename = lockfile.filename.clone();
Self {
lockfile: Mutex::new(lockfile),
filename,
}
}
/// Get the inner deno_lockfile::Lockfile.
pub fn lock(&self) -> Guard<Lockfile> {
Guard {
guard: self.lockfile.lock(),
}
}
pub fn set_workspace_config(
&self,
options: deno_lockfile::SetWorkspaceConfigOptions,
) {
self.lockfile.lock().set_workspace_config(options);
}
pub fn overwrite(&self) -> bool {
self.lockfile.lock().overwrite
}
pub fn write_if_changed(&self) -> Result<(), AnyError> {
let mut lockfile = self.lockfile.lock();
let Some(bytes) = lockfile.resolve_write_bytes() else {
return Ok(()); // nothing to do
};
// do an atomic write to reduce the chance of multiple deno
// processes corrupting the file
atomic_write_file_with_retries(
&lockfile.filename,
bytes,
cache::CACHE_PERM,
)
.context("Failed writing lockfile.")?;
lockfile.has_content_changed = false;
Ok(())
}
pub fn discover(
flags: &Flags,
maybe_config_file: Option<&ConfigFile>,
maybe_package_json: Option<&PackageJson>,
) -> Result<Option<CliLockfile>, AnyError> {
if flags.no_lock
|| matches!(
flags.subcommand,
DenoSubcommand::Install(InstallFlags {
kind: InstallKind::Global(..),
..
}) | DenoSubcommand::Uninstall(_)
)
{
return Ok(None);
}
let filename = match flags.lock {
Some(ref lock) => PathBuf::from(lock),
None => match maybe_config_file {
Some(config_file) => {
if config_file.specifier.scheme() == "file" {
match config_file.resolve_lockfile_path()? {
Some(path) => path,
None => return Ok(None),
}
} else {
return Ok(None);
}
}
None => match maybe_package_json {
Some(package_json) => {
package_json.path.parent().unwrap().join("deno.lock")
}
None => return Ok(None),
},
},
};
let lockfile = if flags.lock_write {
CliLockfile::new(Lockfile::new_empty(filename, true))
} else {
Self::read_from_path(filename)?
};
Ok(Some(lockfile))
}
pub fn read_from_path(filename: PathBuf) -> Result<CliLockfile, AnyError> {
match std::fs::read_to_string(&filename) {
Ok(text) => Ok(CliLockfile::new(Lockfile::with_lockfile_content(
filename, &text, false,
)?)),
Err(err) if err.kind() == std::io::ErrorKind::NotFound => {
Ok(CliLockfile::new(Lockfile::new_empty(filename, false)))
}
Err(err) => Err(err).with_context(|| {
format!("Failed reading lockfile '{}'", filename.display())
}),
}
}
}
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