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use serde::{Deserialize, Serialize}; |
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|
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use std::{ |
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fs::canonicalize, |
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io::{Read, BufRead, BufReader}, |
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path::PathBuf, |
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process::{Child, Command, Stdio}, |
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sync::{Arc, Mutex}, |
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}; |
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|
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#[derive(Serialize, Deserialize, Clone, Debug)] |
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pub struct ServiceConf { |
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pub name: String, |
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command: String, |
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args: Option<String>, |
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directory: Option<PathBuf>, |
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pub autostart: bool, |
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} |
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impl ServiceConf { |
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pub fn new() -> Self { |
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Self { |
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name: String::new(), |
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command: String::new(), |
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args: None, |
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directory: None, |
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autostart: false, |
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} |
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} |
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pub fn from_parts( |
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name: String, |
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command: String, |
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args: Option<String>, |
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directory: Option<PathBuf>, |
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autostart: bool, |
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) -> Self { |
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Self { |
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name, |
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command, |
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args, |
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directory, |
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autostart, |
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} |
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} |
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} |
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|
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#[derive(Debug)] |
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pub struct Service { |
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pub config: ServiceConf, |
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process: Option<Mutex<Child>>, |
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} |
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impl Service { |
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pub fn new() -> Self { |
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Self { |
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config: ServiceConf::new(), |
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process: None, |
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} |
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} |
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pub fn from_conf(config: ServiceConf) -> Self { |
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Self { |
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config, |
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process: None, |
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} |
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} |
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pub fn start(&mut self) -> Result<(), Box<dyn std::error::Error>> { |
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if self.process.is_some() { |
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return Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::AlreadyExists, |
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"process already exists!", |
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))); |
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} |
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let command: &str = &self.config.command.as_str(); |
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let args: Vec<String> = if let Some(a) = &self.config.args { |
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let mut v: Vec<String> = Vec::new(); |
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for arg in a.split_whitespace() { |
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v.push(String::from(arg)); |
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} |
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v |
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} else { |
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Vec::new() |
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}; |
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if let Some(cwd) = &self.config.directory { |
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let child = Command::new(command) |
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.args(args) |
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.current_dir(canonicalize(cwd)?) |
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.stdin(Stdio::piped()) |
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.stdout(Stdio::piped()) |
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.stderr(Stdio::piped()) |
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.spawn()?; |
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self.process = Some(Mutex::new(child)); |
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} else { |
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let child = Command::new(command) |
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.args(args) |
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.stdin(Stdio::piped()) |
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.stdout(Stdio::piped()) |
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.stderr(Stdio::piped()) |
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.spawn()?; |
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self.process = Some(Mutex::new(child)); |
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}; |
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Ok(()) |
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} |
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pub fn stop(&mut self) -> Result<(), Box<dyn std::error::Error>> { |
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if let Some(process) = &self.process { |
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if let Ok(mut process) = process.lock() { |
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process.kill()?; |
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} else { |
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return Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::ResourceBusy, |
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"cannot acquire lock", |
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))) |
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} |
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} else { |
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return Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::NotFound, |
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"process already exists!", |
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))); |
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}; |
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self.process = None; |
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Ok(()) |
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} |
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//TODO: this function needs to fork and do message passing via mpsc channels. |
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pub fn stdout(&mut self) -> Result<String, Box<dyn std::error::Error>> { |
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if let Some(process) = &mut self.process { |
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if let Ok(mut process) = process.lock() { |
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if let Some(stdout) = process.stdout.as_mut() { |
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let reader = BufReader::new(stdout); |
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Ok(String::from(reader.lines().filter_map(|line| line.ok()).collect::<String>())) |
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} else { |
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Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::ResourceBusy, |
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"cannot acquire stdout", |
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))) |
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} |
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} else { |
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Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::ResourceBusy, |
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"cannot acquire lock", |
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))) |
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} |
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} else { |
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Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::NotFound, |
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"is the process started?", |
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))) |
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} |
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} |
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//TODO: this function needs to fork and do message passing via mpsc channels. |
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//TODO: this function needs to use a bufreader instead |
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pub fn stderr(&mut self) -> Result<String, Box<dyn std::error::Error>> { |
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if let Some(process) = &mut self.process { |
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if let Ok(mut process) = process.lock() { |
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let mut s = String::new(); |
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if let Some(stderr) = process.stderr.as_mut() { |
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stderr.read_to_string(&mut s)?; |
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} |
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Ok(s) |
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} else { |
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Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::ResourceBusy, |
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"cannot acquire lock", |
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))) |
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} |
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} else { |
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Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::NotFound, |
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"is the process started?", |
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))) |
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} |
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} |
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} |
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|
