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use crate::prelude::*;
use serde::Deserialize as _;
#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
pub enum Env {
V0(V0),
}
#[derive(Debug, Clone, serde::Serialize, serde::Deserialize)]
pub struct V0 {
idx: usize,
#[serde(
serialize_with = "serialize_status",
deserialize_with = "deserialize_status"
)]
latest_status: async_std::process::ExitStatus,
pwd: std::path::PathBuf,
#[serde(
serialize_with = "serialize_prev_pwd",
deserialize_with = "deserialize_prev_pwd"
)]
prev_pwd: crate::mutex::Mutex<std::path::PathBuf>,
vars: std::collections::HashMap<std::ffi::OsString, std::ffi::OsString>,
}
impl Env {
pub fn new() -> anyhow::Result<Self> {
let mut vars: std::collections::HashMap<
std::ffi::OsString,
std::ffi::OsString,
> = std::env::vars_os().collect();
vars.insert("SHELL".into(), std::env::current_exe()?.into());
vars.insert("TERM".into(), "screen".into());
let pwd = std::env::current_dir()?;
Ok(Self::V0(V0 {
idx: 0,
latest_status: std::process::ExitStatus::from_raw(0),
pwd: pwd.clone(),
prev_pwd: crate::mutex::new(pwd),
vars,
}))
}
pub fn idx(&self) -> usize {
match self {
Self::V0(env) => env.idx,
}
}
pub fn set_idx(&mut self, idx: usize) {
match self {
Self::V0(env) => env.idx = idx,
}
}
pub fn latest_status(&self) -> &async_std::process::ExitStatus {
match self {
Self::V0(env) => &env.latest_status,
}
}
pub fn set_status(&mut self, status: async_std::process::ExitStatus) {
match self {
Self::V0(env) => {
env.latest_status = status;
}
}
}
pub fn current_dir(&self) -> &std::path::Path {
match self {
Self::V0(env) => &env.pwd,
}
}
pub fn var(&self, k: &str) -> String {
match self {
Self::V0(env) => self.special_var(k).unwrap_or_else(|| {
env.vars.get(std::ffi::OsStr::new(k)).map_or_else(
|| "".to_string(),
|v| v.to_str().unwrap().to_string(),
)
}),
}
}
pub fn set_var<T: Into<std::ffi::OsString>>(&mut self, k: T, v: T) {
match self {
Self::V0(env) => {
env.vars.insert(k.into(), v.into());
}
}
}
pub async fn prev_pwd(&self) -> std::path::PathBuf {
match self {
Self::V0(env) => env.prev_pwd.lock_arc().await.clone(),
}
}
pub async fn set_prev_pwd(&self, prev_pwd: &std::path::Path) {
match self {
Self::V0(env) => {
*env.prev_pwd.lock_arc().await = prev_pwd.to_path_buf();
}
}
}
pub fn apply(&self, cmd: &mut pty_process::Command) {
match self {
Self::V0(env) => {
cmd.current_dir(&env.pwd);
cmd.env_clear();
cmd.envs(env.vars.iter());
}
}
}
pub fn update(
&mut self,
status: std::process::ExitStatus,
) -> anyhow::Result<()> {
self.set_status(status);
self.set_current_dir(std::env::current_dir()?);
self.set_vars(std::env::vars_os());
Ok(())
}
pub fn as_bytes(&self) -> Vec<u8> {
bincode::serialize(self).unwrap()
}
pub fn from_bytes(bytes: &[u8]) -> Self {
bincode::deserialize(bytes).unwrap()
}
fn special_var(&self, k: &str) -> Option<String> {
match self {
Self::V0(env) => Some(match k {
"$" => crate::info::pid(),
"?" => {
let status = env.latest_status;
status
.signal()
.map_or_else(
|| status.code().unwrap(),
|signal| signal + 128,
)
.to_string()
}
_ => return None,
}),
}
}
fn set_current_dir(&mut self, pwd: std::path::PathBuf) {
match self {
Self::V0(env) => {
env.pwd = pwd;
}
}
}
fn set_vars(
&mut self,
it: impl Iterator<Item = (std::ffi::OsString, std::ffi::OsString)>,
) {
match self {
Self::V0(env) => {
env.vars = it.collect();
}
}
}
}
#[allow(clippy::trivially_copy_pass_by_ref)]
fn serialize_status<S>(
status: &std::process::ExitStatus,
s: S,
) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
let code: u16 = status.code().unwrap_or(0).try_into().unwrap();
let signal: u16 = status.signal().unwrap_or(0).try_into().unwrap();
s.serialize_u16((code << 8) | signal)
}
fn deserialize_status<'de, D>(
d: D,
) -> Result<std::process::ExitStatus, D::Error>
where
D: serde::Deserializer<'de>,
{
let status = u16::deserialize(d)?;
Ok(std::process::ExitStatus::from_raw(i32::from(status)))
}
#[allow(clippy::trivially_copy_pass_by_ref)]
fn serialize_prev_pwd<S>(
prev_pwd: &crate::mutex::Mutex<std::path::PathBuf>,
s: S,
) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
s.serialize_bytes(
async_std::task::block_on(async { prev_pwd.lock_arc().await })
.as_os_str()
.as_bytes(),
)
}
fn deserialize_prev_pwd<'de, D>(
d: D,
) -> Result<crate::mutex::Mutex<std::path::PathBuf>, D::Error>
where
D: serde::Deserializer<'de>,
{
Ok(crate::mutex::new(std::path::PathBuf::from(
std::ffi::OsString::from_vec(Vec::deserialize(d)?),
)))
}
|
