nushell/crates/nu-command/src/commands/autoenv.rs
Michael Angerman d06f457b2a
nu-cli refactor moving commands into their own crate nu-command (#2910)
* move commands, futures.rs, script.rs, utils

* move over maybe_print_errors

* add nu_command crate references to nu_cli

* in commands.rs open up to pub mod from pub(crate)

* nu-cli, nu-command, and nu tests are now passing

* cargo fmt

* clean up nu-cli/src/prelude.rs

* code cleanup

* for some reason lex.rs was not formatted, may be causing my error

* remove mod completion from lib.rs which was not being used along with quickcheck macros

* add in allow unused imports

* comment out one failing external test; comment out one failing internal test

* revert commenting out failing tests; something else might be going on; someone with a windows machine should check and see what is going on with these failing windows tests

* Update Cargo.toml

Extend the optional features to nu-command

Co-authored-by: Jonathan Turner <jonathandturner@users.noreply.github.com>
2021-01-12 17:59:53 +13:00

87 lines
3.0 KiB
Rust

use crate::prelude::*;
use nu_engine::WholeStreamCommand;
use nu_errors::ShellError;
use nu_protocol::{ReturnSuccess, Signature, UntaggedValue};
use serde::Deserialize;
use serde::Serialize;
use sha2::{Digest, Sha256};
use std::io::Read;
use std::path::PathBuf;
pub struct Autoenv;
#[derive(Deserialize, Serialize, Debug, Default)]
pub struct Trusted {
pub files: IndexMap<String, Vec<u8>>,
}
impl Trusted {
pub fn new() -> Self {
Trusted {
files: IndexMap::new(),
}
}
}
pub fn file_is_trusted(nu_env_file: &PathBuf, content: &[u8]) -> Result<bool, ShellError> {
let contentdigest = Sha256::digest(&content).as_slice().to_vec();
let nufile = std::fs::canonicalize(nu_env_file)?;
let trusted = read_trusted()?;
Ok(trusted.files.get(&nufile.to_string_lossy().to_string()) == Some(&contentdigest))
}
pub fn read_trusted() -> Result<Trusted, ShellError> {
let config_path = config::default_path_for(&Some(PathBuf::from("nu-env.toml")))?;
let mut file = std::fs::OpenOptions::new()
.read(true)
.create(true)
.write(true)
.open(config_path)
.map_err(|_| ShellError::untagged_runtime_error("Couldn't open nu-env.toml"))?;
let mut doc = String::new();
file.read_to_string(&mut doc)?;
let allowed = toml::de::from_str(doc.as_str()).unwrap_or_else(|_| Trusted::new());
Ok(allowed)
}
#[async_trait]
impl WholeStreamCommand for Autoenv {
fn name(&self) -> &str {
"autoenv"
}
fn usage(&self) -> &str {
// "Mark a .nu-env file in a directory as trusted. Needs to be re-run after each change to the file or its filepath."
r#"Manage directory specific environment variables and scripts. Create a file called .nu-env in any directory and run 'autoenv trust' to let nushell read it when entering the directory.
The file can contain several optional sections:
env: environment variables to set when visiting the directory. The variables are unset after leaving the directory and any overwritten values are restored.
scriptvars: environment variables that should be set to the return value of a script. After they have been set, they behave in the same way as variables set in the env section.
scripts: scripts to run when entering the directory or leaving it."#
}
fn signature(&self) -> Signature {
Signature::build("autoenv")
}
async fn run(&self, args: CommandArgs) -> Result<OutputStream, ShellError> {
Ok(OutputStream::one(ReturnSuccess::value(
UntaggedValue::string(get_help(&Autoenv, &args.scope)).into_value(Tag::unknown()),
)))
}
fn examples(&self) -> Vec<Example> {
vec![Example {
description: "Example .nu-env file",
example: r#"cat .nu-env
[env]
mykey = "myvalue"
[scriptvars]
myscript = "echo myval"
[scripts]
entryscripts = ["touch hello.txt", "touch hello2.txt"]
exitscripts = ["touch bye.txt"]"#,
result: None,
}]
}
}