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Merge pull request #447 from cole-h/nix-env-describe

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nixenv: describe what went wrong when io fails
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Graham Christensen 2020-04-03 14:07:14 -04:00 committed by GitHub
parent f9086a62ec 9dc0fd123a
commit 85988113aa
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 30 additions and 13 deletions
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43
ofborg/src/nixenv.rs
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@ -5,7 +5,7 @@ use crate::nixstats::EvaluationStats;
use crate::outpathdiff; use crate::outpathdiff;
use std::fs::{self, File}; use std::fs::{self, File};
use std::io::{BufRead, BufReader, Read, Seek, SeekFrom, Write}; use std::io::{self, BufRead, BufReader, Read, Seek, SeekFrom, Write};
use std::path::PathBuf; use std::path::PathBuf;
pub struct HydraNixEnv { pub struct HydraNixEnv {
@ -59,16 +59,21 @@ impl HydraNixEnv {
/// Put outpaths.nix in to the project root, which is what /// Put outpaths.nix in to the project root, which is what
/// emulates Hydra's behavior. /// emulates Hydra's behavior.
fn place_nix(&self) -> Result<(), std::io::Error> { fn place_nix(&self) -> Result<(), Error> {
let mut file = File::create(self.outpath_nix_path())?; let outpath = self.outpath_nix_path();
file.write_all(include_bytes!("outpaths.nix"))?; let mut file = File::create(&outpath).map_err(|e| Error::CreateFile(outpath, e))?;
Ok(()) file.write_all(include_bytes!("outpaths.nix"))
.map_err(|e| Error::WriteFile(file, e))
} }
fn remove_nix(&self) -> Result<(), std::io::Error> { fn remove_nix(&self) -> Result<(), Error> {
fs::remove_file(self.outpath_nix_path())?; let outpath_nix = self.outpath_nix_path();
fs::remove_file(self.outpath_stats_path())?; let outpath_stats = self.outpath_stats_path();
fs::remove_file(&outpath_nix).map_err(|e| Error::RemoveFile(outpath_nix, e))?;
fs::remove_file(&outpath_stats).map_err(|e| Error::RemoveFile(outpath_stats, e))?;
Ok(()) Ok(())
} }
@ -80,7 +85,7 @@ impl HydraNixEnv {
self.path.join(".gc-of-borg-stats.json") self.path.join(".gc-of-borg-stats.json")
} }
fn run_nix_env(&self) -> (bool, File, File, Result<File, std::io::Error>) { fn run_nix_env(&self) -> (bool, File, File, Result<File, io::Error>) {
let check_meta = if self.check_meta { "true" } else { "false" }; let check_meta = if self.check_meta { "true" } else { "false" };
let mut cmd = self.nix.safe_command( let mut cmd = self.nix.safe_command(
@ -106,14 +111,17 @@ impl HydraNixEnv {
} }
pub enum Error { pub enum Error {
Io(std::io::Error), Io(io::Error),
CreateFile(PathBuf, io::Error),
RemoveFile(PathBuf, io::Error),
WriteFile(File, io::Error),
CommandFailed(File), CommandFailed(File),
StatsParse(File, Result<u64, std::io::Error>, serde_json::Error), StatsParse(File, Result<u64, io::Error>, serde_json::Error),
UncleanEvaluation(Vec<String>), UncleanEvaluation(Vec<String>),
} }
impl From<std::io::Error> for Error { impl From<io::Error> for Error {
fn from(e: std::io::Error) -> Error { fn from(e: io::Error) -> Error {
Error::Io(e) Error::Io(e)
} }
} }
@ -122,6 +130,15 @@ impl Error {
pub fn display(self) -> String { pub fn display(self) -> String {
match self { match self {
Error::Io(e) => format!("Failed during the setup of executing nix-env: {:?}", e), Error::Io(e) => format!("Failed during the setup of executing nix-env: {:?}", e),
Error::CreateFile(path, err) => {
format!("Failed to create file '{:?}': {:?}", path, err)
}
Error::RemoveFile(path, err) => {
format!("Failed to remove file '{:?}': {:?}", path, err)
}
Error::WriteFile(file, err) => {
format!("Failed to write to file '{:?}': {:?}", file, err)
}
Error::CommandFailed(mut fd) => { Error::CommandFailed(mut fd) => {
let mut buffer = Vec::new(); let mut buffer = Vec::new();
let read_result = fd.read_to_end(&mut buffer); let read_result = fd.read_to_end(&mut buffer);