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This commit is contained in:
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.envrc
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.envrc
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use flake
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.gitignore
vendored
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.gitignore
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/target
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.direnv
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Cargo.lock
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Cargo.lock
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# This file is automatically @generated by Cargo.
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|
||||
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
|
||||
dependencies = [
|
||||
"winapi-i686-pc-windows-gnu",
|
||||
"winapi-x86_64-pc-windows-gnu",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winapi-i686-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
|
||||
[[package]]
|
||||
name = "winapi-x86_64-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
|
||||
[[package]]
|
||||
name = "windows-link"
|
||||
version = "0.1.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5e6ad25900d524eaabdbbb96d20b4311e1e7ae1699af4fb28c17ae66c80d798a"
|
||||
|
||||
[[package]]
|
||||
name = "windows-sys"
|
||||
version = "0.60.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f2f500e4d28234f72040990ec9d39e3a6b950f9f22d3dba18416c35882612bcb"
|
||||
dependencies = [
|
||||
"windows-targets",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows-targets"
|
||||
version = "0.53.3"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d5fe6031c4041849d7c496a8ded650796e7b6ecc19df1a431c1a363342e5dc91"
|
||||
dependencies = [
|
||||
"windows-link",
|
||||
"windows_aarch64_gnullvm",
|
||||
"windows_aarch64_msvc",
|
||||
"windows_i686_gnu",
|
||||
"windows_i686_gnullvm",
|
||||
"windows_i686_msvc",
|
||||
"windows_x86_64_gnu",
|
||||
"windows_x86_64_gnullvm",
|
||||
"windows_x86_64_msvc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_gnullvm"
|
||||
version = "0.53.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "86b8d5f90ddd19cb4a147a5fa63ca848db3df085e25fee3cc10b39b6eebae764"
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_msvc"
|
||||
version = "0.53.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "c7651a1f62a11b8cbd5e0d42526e55f2c99886c77e007179efff86c2b137e66c"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnu"
|
||||
version = "0.53.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "c1dc67659d35f387f5f6c479dc4e28f1d4bb90ddd1a5d3da2e5d97b42d6272c3"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnullvm"
|
||||
version = "0.53.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9ce6ccbdedbf6d6354471319e781c0dfef054c81fbc7cf83f338a4296c0cae11"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_msvc"
|
||||
version = "0.53.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "581fee95406bb13382d2f65cd4a908ca7b1e4c2f1917f143ba16efe98a589b5d"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnu"
|
||||
version = "0.53.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "2e55b5ac9ea33f2fc1716d1742db15574fd6fc8dadc51caab1c16a3d3b4190ba"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnullvm"
|
||||
version = "0.53.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0a6e035dd0599267ce1ee132e51c27dd29437f63325753051e71dd9e42406c57"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.53.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "271414315aff87387382ec3d271b52d7ae78726f5d44ac98b4f4030c91880486"
|
||||
18
Cargo.toml
Normal file
18
Cargo.toml
Normal file
|
|
@ -0,0 +1,18 @@
|
|||
[package]
|
||||
name = "cade"
|
||||
version = "0.1.0"
|
||||
edition = "2024"
|
||||
|
||||
[profile.release]
|
||||
strip = true
|
||||
opt-level = "z"
|
||||
codegen-units = 1
|
||||
# lto = true
|
||||
# panic = "abort"
|
||||
|
||||
[dependencies]
|
||||
anyhow = "1.0.99"
|
||||
bincode = "2.0.1"
|
||||
clap = { version = "4.5.45", features = ["derive"] }
|
||||
microxdg = "0.2.0"
|
||||
sled = "0.34.7"
|
||||
43
flake.lock
generated
Normal file
43
flake.lock
generated
Normal file
|
|
@ -0,0 +1,43 @@
|
|||
{
|
||||
"nodes": {
|
||||
"nixpkgs": {
|
||||
"locked": {
|
||||
"lastModified": 1755175540,
|
||||
"narHash": "sha256-V0j2S1r25QnbqBLzN2Rg/dKKil789bI3P3id7bDPVc4=",
|
||||
"owner": "nixos",
|
||||
"repo": "nixpkgs",
|
||||
"rev": "a595dde4d0d31606e19dcec73db02279db59d201",
|
||||
"type": "github"
|
||||
},
|
||||
"original": {
|
||||
"owner": "nixos",
|
||||
"ref": "nixpkgs-unstable",
|
||||
"repo": "nixpkgs",
|
||||
"type": "github"
|
||||
}
|
||||
},
|
||||
"root": {
|
||||
"inputs": {
|
||||
"nixpkgs": "nixpkgs",
|
||||
"systems": "systems"
|
||||
}
|
||||
},
|
||||
"systems": {
|
||||
"locked": {
|
||||
"lastModified": 1689347949,
|
||||
"narHash": "sha256-12tWmuL2zgBgZkdoB6qXZsgJEH9LR3oUgpaQq2RbI80=",
|
||||
"owner": "nix-systems",
|
||||
"repo": "default-linux",
|
||||
"rev": "31732fcf5e8fea42e59c2488ad31a0e651500f68",
|
||||
"type": "github"
|
||||
},
|
||||
"original": {
|
||||
"owner": "nix-systems",
|
||||
"repo": "default-linux",
|
||||
"type": "github"
|
||||
}
|
||||
}
|
||||
},
|
||||
"root": "root",
|
||||
"version": 7
|
||||
}
|
||||
44
flake.nix
Normal file
44
flake.nix
Normal file
|
|
@ -0,0 +1,44 @@
|
|||
{
|
||||
inputs.nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
|
||||
inputs.systems.url = "github:nix-systems/default-linux";
|
||||
|
||||
outputs =
|
||||
{
|
||||
self,
|
||||
nixpkgs,
|
||||
systems,
|
||||
}:
|
||||
let
|
||||
forAllSystems =
|
||||
function: nixpkgs.lib.genAttrs (import systems) (system: function nixpkgs.legacyPackages.${system});
|
||||
in
|
||||
{
|
||||
devShells = forAllSystems (pkgs: {
|
||||
default = pkgs.mkShell {
|
||||
RUSTFLAGS = "-C prefer-dynamic=yes";
|
||||
packages = builtins.attrValues {
|
||||
inherit (pkgs)
|
||||
rustc
|
||||
cargo
|
||||
rust-analyzer
|
||||
rustfmt
|
||||
clippy
|
||||
;
|
||||
};
|
||||
};
|
||||
});
|
||||
packages = forAllSystems (pkgs: {
|
||||
default =
|
||||
let
|
||||
project = (builtins.fromTOML (builtins.readFile ./Cargo.toml)).package;
|
||||
in
|
||||
pkgs.rustPlatform.buildRustPackage (finalAttrs: {
|
||||
pname = project.name;
|
||||
version = project.version;
|
||||
src = ./.;
|
||||
cargoLock.lockFile = ./Cargo.lock;
|
||||
RUSTFLAGS = "-C prefer-dynamic=yes";
|
||||
});
|
||||
});
|
||||
};
|
||||
}
|
||||
373
src/main.rs
Normal file
373
src/main.rs
Normal file
|
|
@ -0,0 +1,373 @@
|
|||
use std::{
|
||||
collections::HashMap,
|
||||
ffi::OsString,
|
||||
fmt::{Debug, Display},
|
||||
io::{BufRead, Read},
|
||||
os::unix::process::CommandExt,
|
||||
path::{Path, PathBuf},
|
||||
str::{FromStr, SplitWhitespace},
|
||||
};
|
||||
|
||||
use anyhow::{Context, Result, anyhow, bail};
|
||||
use clap::{Parser, Subcommand};
|
||||
|
||||
#[repr(u8)]
|
||||
#[derive(bincode::Encode, bincode::Decode, PartialEq, Debug)]
|
||||
enum Permission {
|
||||
Allowed,
|
||||
Disallowed,
|
||||
}
|
||||
impl Display for Permission {
|
||||
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
||||
Debug::fmt(self, f)
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Subcommand)]
|
||||
enum Action {
|
||||
Activate,
|
||||
Allow,
|
||||
Disallow,
|
||||
Edit,
|
||||
}
|
||||
|
||||
#[derive(Parser)]
|
||||
struct Cli {
|
||||
#[command(subcommand)]
|
||||
action: Action,
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
enum Loadable {
|
||||
Default,
|
||||
Flake(String),
|
||||
Shell(String),
|
||||
Env(String),
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
enum Keyword {
|
||||
Pure,
|
||||
Call(Vec<String>),
|
||||
Load(Loadable),
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
enum ParseError {
|
||||
InvalidKeyword,
|
||||
UnknownLoadable,
|
||||
TooManyOptions,
|
||||
TooFewOptions,
|
||||
}
|
||||
impl Display for ParseError {
|
||||
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
||||
Debug::fmt(self, f)
|
||||
}
|
||||
}
|
||||
|
||||
impl FromStr for Keyword {
|
||||
type Err = ParseError;
|
||||
fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
|
||||
let lower = s.to_lowercase();
|
||||
use Keyword::*;
|
||||
if s.len() >= 4 {
|
||||
let res = match &lower.get(..4) {
|
||||
Some("pure") => Pure,
|
||||
Some("call") => {
|
||||
let target: Vec<String> = lower[4..]
|
||||
.split_whitespace()
|
||||
.map(|s| s.to_owned())
|
||||
.collect();
|
||||
if target.is_empty() {
|
||||
return Err(ParseError::TooFewOptions);
|
||||
}
|
||||
Call(target)
|
||||
}
|
||||
Some("load") => {
|
||||
let mut words = lower[4..].split_whitespace();
|
||||
if words.clone().count() > 2 {
|
||||
return Err(ParseError::TooManyOptions);
|
||||
} else {
|
||||
match words.next() {
|
||||
None => Load(Loadable::Default),
|
||||
Some("shell") => {
|
||||
Load(Loadable::Shell(s.get(11..).unwrap_or("").to_string()))
|
||||
}
|
||||
Some("flake") => {
|
||||
Load(Loadable::Flake(s.get(11..).unwrap_or("").to_string()))
|
||||
}
|
||||
Some("env") => {
|
||||
Load(Loadable::Env(s.get(9..).unwrap_or("").to_string()))
|
||||
}
|
||||
Some(_) => return Err(ParseError::UnknownLoadable),
|
||||
}
|
||||
}
|
||||
}
|
||||
Some(n) => {
|
||||
eprintln!("found invalid command {n}, dying..");
|
||||
return Err(ParseError::InvalidKeyword);
|
||||
}
|
||||
None => {
|
||||
return Err(ParseError::InvalidKeyword);
|
||||
}
|
||||
};
|
||||
Ok(res)
|
||||
} else {
|
||||
Err(ParseError::InvalidKeyword)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn read_cade(path: &Path) -> Result<Vec<Keyword>> {
|
||||
let contents = std::fs::read(path).context("reading cade file")?;
|
||||
let mut accum = Vec::new();
|
||||
let mut lines = contents.lines();
|
||||
while let Some(Ok(line)) = lines.next() {
|
||||
let instruction: Keyword = line
|
||||
.parse()
|
||||
.map_err(|e| anyhow!("while parsing cade file at {}: {e:?}", path.display()))?;
|
||||
accum.push(instruction);
|
||||
}
|
||||
Ok(accum)
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
enum EnvAction {
|
||||
Add(String, String),
|
||||
Clear(String),
|
||||
Purify,
|
||||
}
|
||||
|
||||
fn load_flake(path: &Path, output: Option<String>) -> Result<Vec<EnvAction>> {
|
||||
let mut nix_cmd = String::from("nix develop ");
|
||||
if let Some(flake_output) = output {
|
||||
nix_cmd.push_str(&[&flake_output, " "].concat());
|
||||
}
|
||||
nix_cmd.push_str("-ic env --null");
|
||||
let mut proc = std::process::Command::new("sh");
|
||||
// proc.env_clear();
|
||||
proc.arg("-c");
|
||||
proc.arg(nix_cmd);
|
||||
proc.current_dir(path);
|
||||
let output = proc
|
||||
.output()
|
||||
.with_context(|| format!("loading flake at {}", path.display()))?
|
||||
.stdout;
|
||||
let text = String::from_utf8(output).context("converting output to text")?;
|
||||
parse_envs(text)
|
||||
}
|
||||
|
||||
fn load_shell(path: &Path, filename: String) -> Result<Vec<EnvAction>> {
|
||||
let mut nix_cmd = String::from("nix-shell ");
|
||||
if filename.is_empty() {
|
||||
nix_cmd.push_str(&[&filename, " "].concat());
|
||||
}
|
||||
nix_cmd.push_str("--pure --command env --null");
|
||||
let mut proc = std::process::Command::new("sh");
|
||||
proc.env_clear();
|
||||
proc.arg("-c");
|
||||
proc.arg(nix_cmd);
|
||||
proc.current_dir(path);
|
||||
let output = proc
|
||||
.output()
|
||||
.with_context(|| format!("loading shell at {}", path.display()))?
|
||||
.stdout;
|
||||
let text = String::from_utf8(output).context("converting output to text")?;
|
||||
parse_envs(text)
|
||||
}
|
||||
|
||||
fn load_env(path: &Path, filename: String) -> Result<Vec<EnvAction>> {
|
||||
let mut p = path.to_path_buf();
|
||||
if filename.is_empty() {
|
||||
p.push(".env");
|
||||
} else {
|
||||
p.push(filename);
|
||||
}
|
||||
let mut file = std::fs::File::open(p)
|
||||
.with_context(|| format!("opening env file at {}", path.display()))?;
|
||||
let mut buf = String::new();
|
||||
file.read_to_string(&mut buf).context("reading env file")?;
|
||||
parse_envs(buf)
|
||||
}
|
||||
|
||||
fn call(path: &Path, argv: Vec<String>) -> Result<Vec<EnvAction>> {
|
||||
let mut it = argv.iter();
|
||||
// safety: already checked at parsing
|
||||
let mut process = std::process::Command::new(it.next().unwrap());
|
||||
process.current_dir(path);
|
||||
process.args(it);
|
||||
let output = process
|
||||
.output()
|
||||
.with_context(|| format!("running process {}", argv.concat()))?
|
||||
.stdout;
|
||||
|
||||
let text = String::from_utf8(output)
|
||||
.with_context(|| format!("converting call {} output to text", argv.concat()))?
|
||||
.replace(' ', "\0");
|
||||
parse_envs(text)
|
||||
}
|
||||
|
||||
fn parse_envs(text: String) -> Result<Vec<EnvAction>> {
|
||||
let mut envs = Vec::new();
|
||||
use EnvAction::*;
|
||||
for line in text.split('\0') {
|
||||
let split: Vec<&str> = line.split('=').collect();
|
||||
let parse = match split.len() {
|
||||
0 => {
|
||||
return Err(anyhow!("processing returned env var {text}"));
|
||||
}
|
||||
1 => Clear(split[0].to_string()),
|
||||
_ => Add(split[0].to_string(), split[1..].concat().to_string()),
|
||||
};
|
||||
envs.push(parse);
|
||||
}
|
||||
Ok(envs)
|
||||
}
|
||||
|
||||
fn interpret(cascade: HashMap<PathBuf, Vec<Keyword>>) -> Result<Vec<EnvAction>> {
|
||||
let mut actions = Vec::new();
|
||||
for (path, layer) in cascade {
|
||||
for keyword in layer {
|
||||
use EnvAction::*;
|
||||
use Keyword::*;
|
||||
use Loadable::*;
|
||||
let acts = match keyword {
|
||||
Pure => Ok(Vec::from([Purify])),
|
||||
Call(argv) => call(&path, argv).context("calling process"),
|
||||
Load(loadable) => match loadable {
|
||||
Default => load_flake(&path, None).context("loading flake"),
|
||||
Flake(output) => load_flake(&path, Some(output)),
|
||||
Shell(filename) => load_shell(&path, filename).context("loading shell"),
|
||||
Env(filename) => load_env(&path, filename).context("loading env file"),
|
||||
},
|
||||
}?;
|
||||
actions.extend(acts);
|
||||
}
|
||||
}
|
||||
Ok(actions)
|
||||
}
|
||||
|
||||
fn do_activation() -> Result<()> {
|
||||
let dir = ensure_dir()?;
|
||||
let db = sled::open(dir).context("open database")?;
|
||||
let cwd = std::env::current_dir()
|
||||
.context("determine CWD")?
|
||||
.into_os_string();
|
||||
|
||||
if db
|
||||
.get(cwd.into_encoded_bytes())
|
||||
.map(|perm| {
|
||||
perm.map(|inner| {
|
||||
let (p, _) =
|
||||
bincode::decode_from_slice(inner.as_ref(), bincode::config::standard())
|
||||
.unwrap_or((Permission::Disallowed, 0));
|
||||
p
|
||||
})
|
||||
.unwrap_or(Permission::Disallowed)
|
||||
})
|
||||
.unwrap_or(Permission::Disallowed)
|
||||
== Permission::Disallowed
|
||||
{
|
||||
bail!("cade is not permitted to operate here; use 'cade allow'.");
|
||||
}
|
||||
|
||||
let mut current_dir = std::env::current_dir().context("determine CWD")?;
|
||||
let base_env = std::env::vars().collect::<HashMap<String, String>>();
|
||||
|
||||
let mut cascade = HashMap::new();
|
||||
cascade.insert(
|
||||
current_dir.clone(),
|
||||
read_cade(¤t_dir.join(".cade")).context("reading cade file")?,
|
||||
);
|
||||
|
||||
while let Some(parent) = current_dir.parent()
|
||||
&& std::fs::exists(parent.join(".cade"))
|
||||
.context("check for .cade file in parent directory")?
|
||||
{
|
||||
current_dir = parent.to_path_buf();
|
||||
cascade.insert(
|
||||
current_dir.clone(),
|
||||
read_cade(¤t_dir.join(".cade")).context("reading cade file")?,
|
||||
);
|
||||
}
|
||||
|
||||
let mut env = HashMap::new();
|
||||
let adjustments = interpret(cascade)?;
|
||||
use EnvAction::*;
|
||||
for action in adjustments {
|
||||
let _ = match action {
|
||||
Add(k, v) => env.insert(k, v),
|
||||
Clear(k) => env.remove(&k),
|
||||
Purify => {
|
||||
for (bk, bv) in base_env.iter() {
|
||||
if env.get(bk).is_some_and(|inner| inner == bv) {
|
||||
env.remove(bk);
|
||||
}
|
||||
}
|
||||
None
|
||||
}
|
||||
};
|
||||
}
|
||||
for (k, v) in env {
|
||||
println!("{k}={v}");
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn set_permission(permission: Permission) -> Result<()> {
|
||||
let dir = ensure_dir()?;
|
||||
let db = sled::open(dir).context("open database")?;
|
||||
let cwd = std::env::current_dir()
|
||||
.context("determine CWD")?
|
||||
.into_os_string();
|
||||
let encoded_permission = bincode::encode_to_vec(&permission, bincode::config::standard())
|
||||
.context("encode permission value")?;
|
||||
|
||||
let _ = db
|
||||
.insert(cwd.into_encoded_bytes(), encoded_permission)
|
||||
.context("update permissions database")?;
|
||||
eprintln!(
|
||||
"cade is now {} here.",
|
||||
permission.to_string().to_lowercase()
|
||||
);
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn ensure_dir() -> Result<PathBuf> {
|
||||
let xdg = microxdg::Xdg::new().context("establish XDG paths")?;
|
||||
let mut path = xdg.state().context("find xdg state dir")?;
|
||||
path.push("cade");
|
||||
if !std::fs::exists(&path).is_ok_and(|v| v) {
|
||||
std::fs::create_dir(&path).context("create cade's state path")?;
|
||||
}
|
||||
path.push("permissions.db");
|
||||
Ok(path)
|
||||
}
|
||||
|
||||
fn try_main() -> Result<()> {
|
||||
let args = Cli::parse();
|
||||
use Action::*;
|
||||
match args.action {
|
||||
// TODO recursively ascend until we hit a top level .cade, then activate downwards
|
||||
Activate => do_activation().context("activate cade environment")?,
|
||||
Allow => set_permission(Permission::Allowed)?,
|
||||
Disallow => set_permission(Permission::Disallowed)?,
|
||||
Edit => {
|
||||
let editor = std::env::var("EDITOR").context("find EDITOR variable")?;
|
||||
let mut session = std::process::Command::new(Into::<OsString>::into(editor))
|
||||
.arg(Into::<OsString>::into(".cade"))
|
||||
.spawn()
|
||||
.context("spawn editor process")?;
|
||||
session.wait().context("wait for editor process")?;
|
||||
set_permission(Permission::Allowed)?;
|
||||
}
|
||||
};
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn main() {
|
||||
if let Err(e) = try_main() {
|
||||
eprintln!("failed to {e}\n{}", e.root_cause());
|
||||
std::process::exit(1);
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue