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[Chore] Handle 'temp_path' as an actual 'Path' instead of 'String'

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Problem: 'temp_path' and 'lock_path' are handled as 'String'.
This can be a problem when the 'temp_path' directory is a symlink
on the target system, e.g. this is the case with the default
'/tmp' and macOS, where this directory is actually a symlink to '/private/tmp'.

Solution: Handle 'temp_path' and 'lock_path' as actual Paths.
Also, canonicalize 'temp_path' to avoid canary file path mismatches when checking
filesystem events.

As a side effect, also update the 'notify' dependency to the latest stable version.
This commit is contained in:
Roman Melnikov 2023-04-19 17:46:43 +08:00
parent 8c9ea9605e
commit 784e9ee24d
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7 changed files with 177 additions and 190 deletions
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Cargo.lock generated
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checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
[[package]] [[package]]
name = "yansi" name = "yansi"
version = "0.5.0" version = "0.5.0"

2
Cargo.toml
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@ -17,7 +17,7 @@ fork = "0.1"
futures-util = "0.3.6" futures-util = "0.3.6"
log = "0.4" log = "0.4"
merge = "0.1.0" merge = "0.1.0"
notify = "5.0.0-pre.3" notify = "5.1.0"
rnix = "0.8" rnix = "0.8"
serde = { version = "1.0.104", features = [ "derive" ] } serde = { version = "1.0.104", features = [ "derive" ] }
serde_json = "1.0.48" serde_json = "1.0.48"

27
src/bin/activate.rs
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@ -15,9 +15,9 @@ use tokio::time::timeout;
use std::time::Duration; use std::time::Duration;
use std::path::Path; use std::path::PathBuf;
use notify::{RecommendedWatcher, RecursiveMode, Watcher}; use notify::{RecommendedWatcher, RecursiveMode, Watcher, recommended_watcher};
use thiserror::Error; use thiserror::Error;
@ -75,7 +75,7 @@ struct ActivateOpts {
/// Path for any temporary files that may be needed during activation /// Path for any temporary files that may be needed during activation
#[clap(long)] #[clap(long)]
temp_path: String, temp_path: PathBuf,
} }
/// Activate a profile /// Activate a profile
@ -86,7 +86,7 @@ struct WaitOpts {
/// Path for any temporary files that may be needed during activation /// Path for any temporary files that may be needed during activation
#[clap(long)] #[clap(long)]
temp_path: String, temp_path: PathBuf,
} }
/// Activate a profile /// Activate a profile
@ -232,7 +232,7 @@ async fn danger_zone(
pub async fn activation_confirmation( pub async fn activation_confirmation(
profile_path: String, profile_path: String,
temp_path: String, temp_path: PathBuf,
confirm_timeout: u16, confirm_timeout: u16,
closure: String, closure: String,
) -> Result<(), ActivationConfirmationError> { ) -> Result<(), ActivationConfirmationError> {
@ -240,7 +240,7 @@ pub async fn activation_confirmation(
debug!("Ensuring parent directory exists for canary file"); debug!("Ensuring parent directory exists for canary file");
if let Some(parent) = Path::new(&lock_path).parent() { if let Some(parent) = lock_path.parent() {
fs::create_dir_all(parent) fs::create_dir_all(parent)
.await .await
.map_err(ActivationConfirmationError::CreateConfirmDir)?; .map_err(ActivationConfirmationError::CreateConfirmDir)?;
@ -257,7 +257,7 @@ pub async fn activation_confirmation(
let (deleted, done) = mpsc::channel(1); let (deleted, done) = mpsc::channel(1);
let mut watcher: RecommendedWatcher = let mut watcher: RecommendedWatcher =
Watcher::new_immediate(move |res: Result<notify::event::Event, notify::Error>| { recommended_watcher(move |res: Result<notify::event::Event, notify::Error>| {
let send_result = match res { let send_result = match res {
Ok(e) if e.kind == notify::EventKind::Remove(notify::event::RemoveKind::File) => { Ok(e) if e.kind == notify::EventKind::Remove(notify::event::RemoveKind::File) => {
debug!("Got worthy removal event, sending on channel"); debug!("Got worthy removal event, sending on channel");
@ -298,7 +298,7 @@ pub enum WaitError {
#[error("Error waiting for activation: {0}")] #[error("Error waiting for activation: {0}")]
Waiting(#[from] DangerZoneError), Waiting(#[from] DangerZoneError),
} }
pub async fn wait(temp_path: String, closure: String) -> Result<(), WaitError> { pub async fn wait(temp_path: PathBuf, closure: String) -> Result<(), WaitError> {
let lock_path = deploy::make_lock_path(&temp_path, &closure); let lock_path = deploy::make_lock_path(&temp_path, &closure);
let (created, done) = mpsc::channel(1); let (created, done) = mpsc::channel(1);
@ -307,11 +307,16 @@ pub async fn wait(temp_path: String, closure: String) -> Result<(), WaitError> {
// TODO: fix wasteful clone // TODO: fix wasteful clone
let lock_path = lock_path.clone(); let lock_path = lock_path.clone();
Watcher::new_immediate(move |res: Result<notify::event::Event, notify::Error>| { recommended_watcher(move |res: Result<notify::event::Event, notify::Error>| {
let send_result = match res { let send_result = match res {
Ok(e) if e.kind == notify::EventKind::Create(notify::event::CreateKind::File) => { Ok(e) if e.kind == notify::EventKind::Create(notify::event::CreateKind::File) => {
match &e.paths[..] { match &e.paths[..] {
[x] if x == Path::new(&lock_path) => created.try_send(Ok(())), [x] => match lock_path.canonicalize() {
// 'lock_path' may not exist yet when some other files are created in 'temp_path'
// x is already supposed to be canonical path
Ok(lock_path) if x == &lock_path => created.try_send(Ok(())),
_ => Ok (())
}
_ => Ok(()), _ => Ok(()),
} }
} }
@ -363,7 +368,7 @@ pub async fn activate(
profile_path: String, profile_path: String,
closure: String, closure: String,
auto_rollback: bool, auto_rollback: bool,
temp_path: String, temp_path: PathBuf,
confirm_timeout: u16, confirm_timeout: u16,
magic_rollback: bool, magic_rollback: bool,
dry_activate: bool, dry_activate: bool,

3
src/cli.rs
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@ -14,6 +14,7 @@ use self::deploy::{DeployFlake, ParseFlakeError};
use futures_util::stream::{StreamExt, TryStreamExt}; use futures_util::stream::{StreamExt, TryStreamExt};
use log::{debug, error, info, warn}; use log::{debug, error, info, warn};
use serde::Serialize; use serde::Serialize;
use std::path::PathBuf;
use std::process::Stdio; use std::process::Stdio;
use thiserror::Error; use thiserror::Error;
use tokio::process::Command; use tokio::process::Command;
@ -86,7 +87,7 @@ pub struct Opts {
confirm_timeout: Option<u16>, confirm_timeout: Option<u16>,
/// Where to store temporary files (only used by magic-rollback) /// Where to store temporary files (only used by magic-rollback)
#[clap(long)] #[clap(long)]
temp_path: Option<String>, temp_path: Option<PathBuf>,
/// Show what will be activated on the machines /// Show what will be activated on the machines
#[clap(long)] #[clap(long)]
dry_activate: bool, dry_activate: bool,

3
src/data.rs
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@ -5,6 +5,7 @@
use merge::Merge; use merge::Merge;
use serde::Deserialize; use serde::Deserialize;
use std::collections::HashMap; use std::collections::HashMap;
use std::path::PathBuf;
#[derive(Deserialize, Debug, Clone, Merge)] #[derive(Deserialize, Debug, Clone, Merge)]
pub struct GenericSettings { pub struct GenericSettings {
@ -25,7 +26,7 @@ pub struct GenericSettings {
#[serde(rename(deserialize = "confirmTimeout"))] #[serde(rename(deserialize = "confirmTimeout"))]
pub confirm_timeout: Option<u16>, pub confirm_timeout: Option<u16>,
#[serde(rename(deserialize = "tempPath"))] #[serde(rename(deserialize = "tempPath"))]
pub temp_path: Option<String>, pub temp_path: Option<PathBuf>,
#[serde(rename(deserialize = "magicRollback"))] #[serde(rename(deserialize = "magicRollback"))]
pub magic_rollback: Option<bool>, pub magic_rollback: Option<bool>,
#[serde(rename(deserialize = "sudo"))] #[serde(rename(deserialize = "sudo"))]

30
src/deploy.rs
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@ -5,7 +5,7 @@
// SPDX-License-Identifier: MPL-2.0 // SPDX-License-Identifier: MPL-2.0
use log::{debug, info}; use log::{debug, info};
use std::borrow::Cow; use std::path::Path;
use thiserror::Error; use thiserror::Error;
use tokio::process::Command; use tokio::process::Command;
@ -16,7 +16,7 @@ struct ActivateCommandData<'a> {
profile_path: &'a str, profile_path: &'a str,
closure: &'a str, closure: &'a str,
auto_rollback: bool, auto_rollback: bool,
temp_path: &'a str, temp_path: &'a Path,
confirm_timeout: u16, confirm_timeout: u16,
magic_rollback: bool, magic_rollback: bool,
debug_logs: bool, debug_logs: bool,
@ -38,7 +38,7 @@ fn build_activate_command(data: &ActivateCommandData) -> String {
self_activate_command = format!( self_activate_command = format!(
"{} activate '{}' '{}' --temp-path '{}'", "{} activate '{}' '{}' --temp-path '{}'",
self_activate_command, data.closure, data.profile_path, data.temp_path self_activate_command, data.closure, data.profile_path, data.temp_path.display()
); );
self_activate_command = format!( self_activate_command = format!(
@ -77,7 +77,7 @@ fn test_activation_command_builder() {
let auto_rollback = true; let auto_rollback = true;
let dry_activate = false; let dry_activate = false;
let boot = false; let boot = false;
let temp_path = "/tmp"; let temp_path = Path::new("/tmp");
let confirm_timeout = 30; let confirm_timeout = 30;
let magic_rollback = true; let magic_rollback = true;
let debug_logs = true; let debug_logs = true;
@ -105,7 +105,7 @@ fn test_activation_command_builder() {
struct WaitCommandData<'a> { struct WaitCommandData<'a> {
sudo: &'a Option<String>, sudo: &'a Option<String>,
closure: &'a str, closure: &'a str,
temp_path: &'a str, temp_path: &'a Path,
debug_logs: bool, debug_logs: bool,
log_dir: Option<&'a str>, log_dir: Option<&'a str>,
} }
@ -123,7 +123,7 @@ fn build_wait_command(data: &WaitCommandData) -> String {
self_activate_command = format!( self_activate_command = format!(
"{} wait '{}' --temp-path '{}'", "{} wait '{}' --temp-path '{}'",
self_activate_command, data.closure, data.temp_path, self_activate_command, data.closure, data.temp_path.display(),
); );
if let Some(sudo_cmd) = &data.sudo { if let Some(sudo_cmd) = &data.sudo {
@ -137,7 +137,7 @@ fn build_wait_command(data: &WaitCommandData) -> String {
fn test_wait_command_builder() { fn test_wait_command_builder() {
let sudo = Some("sudo -u test".to_string()); let sudo = Some("sudo -u test".to_string());
let closure = "/nix/store/blah/etc"; let closure = "/nix/store/blah/etc";
let temp_path = "/tmp"; let temp_path = Path::new("/tmp");
let debug_logs = true; let debug_logs = true;
let log_dir = Some("/tmp/something.txt"); let log_dir = Some("/tmp/something.txt");
@ -216,7 +216,7 @@ pub enum ConfirmProfileError {
pub async fn confirm_profile( pub async fn confirm_profile(
deploy_data: &super::DeployData<'_>, deploy_data: &super::DeployData<'_>,
deploy_defs: &super::DeployDefs, deploy_defs: &super::DeployDefs,
temp_path: Cow<'_, str>, temp_path: &Path,
ssh_addr: &str, ssh_addr: &str,
) -> Result<(), ConfirmProfileError> { ) -> Result<(), ConfirmProfileError> {
let mut ssh_confirm_command = Command::new("ssh"); let mut ssh_confirm_command = Command::new("ssh");
@ -226,9 +226,9 @@ pub async fn confirm_profile(
ssh_confirm_command.arg(ssh_opt); ssh_confirm_command.arg(ssh_opt);
} }
let lock_path = super::make_lock_path(&temp_path, &deploy_data.profile.profile_settings.path); let lock_path = super::make_lock_path(temp_path, &deploy_data.profile.profile_settings.path);
let mut confirm_command = format!("rm {}", lock_path); let mut confirm_command = format!("rm {}", lock_path.display());
if let Some(sudo_cmd) = &deploy_defs.sudo { if let Some(sudo_cmd) = &deploy_defs.sudo {
confirm_command = format!("{} {}", sudo_cmd, confirm_command); confirm_command = format!("{} {}", sudo_cmd, confirm_command);
} }
@ -286,9 +286,9 @@ pub async fn deploy_profile(
); );
} }
let temp_path: Cow<str> = match &deploy_data.merged_settings.temp_path { let temp_path: &Path = match &deploy_data.merged_settings.temp_path {
Some(x) => x.into(), Some(x) => x,
None => "/tmp".into(), None => Path::new("/tmp"),
}; };
let confirm_timeout = deploy_data.merged_settings.confirm_timeout.unwrap_or(30); let confirm_timeout = deploy_data.merged_settings.confirm_timeout.unwrap_or(30);
@ -302,7 +302,7 @@ pub async fn deploy_profile(
profile_path: &deploy_defs.profile_path, profile_path: &deploy_defs.profile_path,
closure: &deploy_data.profile.profile_settings.path, closure: &deploy_data.profile.profile_settings.path,
auto_rollback, auto_rollback,
temp_path: &temp_path, temp_path: temp_path,
confirm_timeout, confirm_timeout,
magic_rollback, magic_rollback,
debug_logs: deploy_data.debug_logs, debug_logs: deploy_data.debug_logs,
@ -350,7 +350,7 @@ pub async fn deploy_profile(
let self_wait_command = build_wait_command(&WaitCommandData { let self_wait_command = build_wait_command(&WaitCommandData {
sudo: &deploy_defs.sudo, sudo: &deploy_defs.sudo,
closure: &deploy_data.profile.profile_settings.path, closure: &deploy_data.profile.profile_settings.path,
temp_path: &temp_path, temp_path: temp_path,
debug_logs: deploy_data.debug_logs, debug_logs: deploy_data.debug_logs,
log_dir: deploy_data.log_dir, log_dir: deploy_data.log_dir,
}); });

8
src/lib.rs
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@ -12,10 +12,12 @@ use thiserror::Error;
use flexi_logger::*; use flexi_logger::*;
pub fn make_lock_path(temp_path: &str, closure: &str) -> String { use std::path::{Path, PathBuf};
pub fn make_lock_path(temp_path: &Path, closure: &str) -> PathBuf {
let lock_hash = let lock_hash =
&closure["/nix/store/".len()..closure.find('-').unwrap_or_else(|| closure.len())]; &closure["/nix/store/".len()..closure.find('-').unwrap_or_else(|| closure.len())];
format!("{}/deploy-rs-canary-{}", temp_path, lock_hash) temp_path.join(format!("deploy-rs-canary-{}", lock_hash))
} }
const fn make_emoji(level: log::Level) -> &'static str { const fn make_emoji(level: log::Level) -> &'static str {
@ -159,7 +161,7 @@ pub struct CmdOverrides {
pub auto_rollback: Option<bool>, pub auto_rollback: Option<bool>,
pub hostname: Option<String>, pub hostname: Option<String>,
pub magic_rollback: Option<bool>, pub magic_rollback: Option<bool>,
pub temp_path: Option<String>, pub temp_path: Option<PathBuf>,
pub confirm_timeout: Option<u16>, pub confirm_timeout: Option<u16>,
pub sudo: Option<String>, pub sudo: Option<String>,
pub dry_activate: bool, pub dry_activate: bool,