diff options
Diffstat (limited to 'tvix')
| -rw-r--r-- | tvix/Cargo.lock | 241 | ||||
| -rw-r--r-- | tvix/Cargo.toml | 4 | ||||
| -rw-r--r-- | tvix/src/bin/nix-store.rs | 104 |
3 files changed, 347 insertions, 2 deletions
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+++ b/tvix/Cargo.toml @@ -5,6 +5,10 @@ edition = "2021" # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html +[dependencies.clap] +version = "3.0.5" +[dependencies.tempfile] +version = "3.2.0" [[bin]] name = "nix-store" diff --git a/tvix/src/bin/nix-store.rs b/tvix/src/bin/nix-store.rs index 7bf5442cb9ed..72e3bb22048e 100644 --- a/tvix/src/bin/nix-store.rs +++ b/tvix/src/bin/nix-store.rs @@ -1,3 +1,103 @@ -fn main () { - println!("hello, nix"); +fn main() { + main_args(std::env::args().collect()).unwrap_or_else(|e| e.exit()); +} + +pub fn main_args(args: Vec<String>) -> clap::Result<NixResult> { + let matches = clap::App::new("nix-store") + .subcommand(clap::App::new("--add").arg(clap::Arg::new("FILE").required(true).index(1))) + .try_get_matches_from(args.iter())?; + if let Some(add) = matches.subcommand_matches("--add") { + let file = add.value_of("FILE").expect("--add needs a file"); + let file_contents = + std::fs::read_to_string(file).expect(&format!("file {} does not exist", file)); + Ok(NixResult::FileAddedToStore { + content: file_contents, + }) + } else { + panic!("read some arguments that we do not know: {:?}", args) + } +} + +#[derive(Debug, Eq, PartialEq)] +pub enum NixResult { + FileAddedToStore { content: String }, +} + +#[cfg(test)] +mod integration_tests { + use std::{collections::VecDeque, io::Write}; + + use super::*; + + #[derive(Debug)] + enum NixOutput { + Err { + status: i32, + stdout: String, + stderr: String, + }, + Ok { + stdout: String, + stderr: String, + }, + } + + fn run_nix_command(cmd: &str, args: Vec<String>) -> NixOutput { + let out = std::process::Command::new(cmd) + .args(args) + .output() + .expect(&format!("could not run {}", cmd)); + match out.status.code().expect("no status code!") { + 0 => NixOutput::Ok { + stdout: String::from_utf8_lossy(&out.stdout).trim_end().to_string(), + stderr: String::from_utf8_lossy(&out.stderr).trim_end().to_string(), + }, + status => NixOutput::Err { + status, + stdout: String::from_utf8_lossy(&out.stdout).trim_end().to_string(), + stderr: String::from_utf8_lossy(&out.stderr).trim_end().to_string(), + }, + } + } + + fn nix_nix_store<'a>(args: Vec<String>) -> NixResult { + match run_nix_command("nix-store", args) { + err @ NixOutput::Err { .. } => panic!("nix-store --add failed: {:#?}", err), + NixOutput::Ok { stdout, .. } => NixResult::FileAddedToStore { + content: std::fs::read_to_string(&stdout) + .expect(&format!("cannot open {} as store file", stdout)), + }, + } + } + + fn tvix_nix_store<'a>(args: Vec<String>) -> NixResult { + eprintln!("running tvix with arguments {:?}", args); + let mut args = VecDeque::from(args); + args.push_front("tvix-store".to_string()); + super::main_args(Vec::from(args)) + .unwrap_or_else(|e| panic!("clap command line parsing failed:\n{}", e)) + } + + #[test] + fn test_nix_store_add() { + let file_content = "I am a copied file"; + let mut tempfile = tempfile::NamedTempFile::new().expect("cannot create temp file"); + tempfile + .write_all(file_content.as_bytes()) + .expect("could not write to tempfile"); + assert_eq!( + tvix_nix_store(vec![ + "--add".to_string(), + tempfile.path().as_os_str().to_string_lossy().into_owned() + ]), + nix_nix_store(vec![ + "--add".to_string(), + tempfile.path().as_os_str().to_string_lossy().into_owned() + ]), + "added file contents were not the same" + ); + + // make sure the tempfile lives till here + drop(tempfile) + } } |