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use anyhow::{anyhow, Result};
use futures::future::join_all;
use serde_yaml::Value;
use std::collections::HashMap;
use std::collections::HashSet;
use std::io;
use std::path;
use tokio::io::AsyncReadExt;
use tokio::io::AsyncWriteExt;
use tracing::event;
use tracing::instrument;
use tracing::Level;
use crate::proxy;
use crate::resource::Resource;
use crate::version::Version;
#[derive(Debug)]
pub struct Workflow {
pub filename: path::PathBuf,
pub contents: String,
pub uses: HashSet<(Resource, Version)>,
pub latest: HashMap<Resource, Version>,
}
impl Workflow {
#[instrument(level="debug", fields(filename = ?filename.as_ref().display()))]
pub async fn new(filename: impl AsRef<path::Path>) -> Result<Workflow> {
let filename = filename.as_ref();
let mut file = tokio::fs::File::open(filename).await?;
let mut contents = String::new();
file.read_to_string(&mut contents).await?;
let uses = buf_parse(contents.as_bytes())?;
Ok(Workflow {
filename: filename.to_owned(),
contents,
uses,
latest: Default::default(),
})
}
#[instrument(level = "debug")]
pub async fn fetch_latest_versions(&mut self, proxy_server: &proxy::Server) {
let tasks = self
.uses
.iter()
.map(|rv| (rv, proxy_server.new_client()))
.map(|((resource, current_version), proxy_client)| async move {
proxy_client
.fetch_latest_version(resource, current_version)
.await
});
self.latest = join_all(tasks)
.await
.into_iter()
.flatten()
.collect::<HashMap<_, _>>();
}
#[instrument(level = "debug")]
pub async fn update_file(&self) -> Result<bool> {
let mut contents = self.contents.clone();
for (resource, current_version) in &self.uses {
if let Some(latest_version) = self.latest.get(resource) {
let current_line = resource.versioned_string(current_version);
let latest_line = resource.versioned_string(latest_version);
contents = contents.replace(¤t_line, &latest_line);
}
}
let updated = contents != self.contents;
if updated {
let mut file = tokio::fs::File::create(&self.filename).await?;
file.write_all(contents.as_bytes()).await?;
}
Ok(updated)
}
}
#[instrument(level = "debug", skip(r))]
fn buf_parse(r: impl io::BufRead) -> Result<HashSet<(Resource, Version)>> {
let data: serde_yaml::Mapping = serde_yaml::from_reader(r)?;
let jobs = data
.get(&Value::String("jobs".into()))
.ok_or_else(|| anyhow!("jobs entry not found"))?
.as_mapping()
.ok_or_else(|| anyhow!("invalid type for jobs entry"))?;
let mut ret = HashSet::default();
for (_, job) in jobs {
if let Some(uses) = job.get(&Value::String("uses".into())) {
let reference = uses
.as_str()
.ok_or_else(|| anyhow!("invalid type for uses entry"))?;
if let Ok((resource, version)) = Resource::parse(reference) {
event!(
Level::INFO,
resource = %resource,
version = %version,
"parsed entity"
);
ret.insert((resource, version));
} else {
event!(
Level::WARN,
reference = reference,
"unable to parse resource"
);
}
}
if let Some(steps) = job.get(&Value::String("steps".into())) {
let steps = steps
.as_sequence()
.ok_or_else(|| anyhow!("invalid type for steps entry"))?;
for step in steps {
if let Some(uses) = step.get(&Value::String("uses".into())) {
let reference = uses
.as_str()
.ok_or_else(|| anyhow!("invalid type for uses entry"))?;
if let Ok((resource, version)) = Resource::parse(reference) {
event!(
Level::INFO,
resource = %resource,
version = %version,
"parsed entity"
);
ret.insert((resource, version));
} else {
event!(
Level::WARN,
reference = reference,
"unable to parse resource"
);
}
}
}
}
}
Ok(ret)
}
#[test]
fn test_parse() -> Result<()> {
let s = r"
---
name: test
jobs:
omnilint:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- uses: docker://lpenz/omnilint:0.4
- run: ls
rust:
uses: lpenz/ghworkflow-rust/.github/workflows/rust.yml@v0.4
";
buf_parse(s.as_bytes())?;
Ok(())
}