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use crate::step::Step;
use serde::{Deserialize, Serialize};
use std::collections::HashSet;
use std::fs::File;
use std::path::{Path, PathBuf};
#[derive(Debug, Serialize, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct Specification {
benchmarks: Vec<Benchmark>,
}
#[derive(Debug, thiserror::Error)]
pub enum SpecificationError {
#[error("Duplicate benchmark name {0}")]
DuplicateBenchmark(
String,
),
#[error("Couldn't open {0}: {1}")]
Open(
PathBuf,
std::io::Error,
),
#[error("Couldn't read YAML specification from {0}:\n {1}")]
Yaml(
PathBuf,
serde_yaml::Error,
),
}
#[derive(Debug, Serialize, Deserialize)]
struct Benchmark {
benchmark: String,
backups: Vec<Backup>,
}
#[derive(Debug, Serialize, Deserialize)]
struct Backup {
pub changes: Vec<Change>,
}
#[derive(Debug, Serialize, Deserialize)]
pub(crate) enum Change {
#[serde(rename = "create")]
Create(Create),
#[serde(rename = "delete")]
Delete(FileCount),
#[serde(rename = "rename")]
Rename(FileCount),
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Create {
pub files: u64,
pub file_size: u64,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct FileCount {
pub files: u64,
}
impl Specification {
pub fn from_file(filename: &Path) -> Result<Self, SpecificationError> {
let f = File::open(filename)
.map_err(|err| SpecificationError::Open(filename.to_path_buf(), err))?;
let spec: Specification = serde_yaml::from_reader(f)
.map_err(|err| SpecificationError::Yaml(filename.to_path_buf(), err))?;
spec.check()?;
Ok(spec)
}
fn check(&self) -> Result<(), SpecificationError> {
let mut names = HashSet::new();
for name in self.benchmarks.iter().map(|b| b.benchmark.to_string()) {
if names.contains(&name) {
return Err(SpecificationError::DuplicateBenchmark(name));
}
names.insert(name);
}
Ok(())
}
pub fn steps(&self) -> Vec<Step> {
let mut steps = vec![];
for b in self.benchmarks.iter() {
let n = b.backups.len();
let after_base = n;
let restore_base = 2 * n;
steps.push(Step::Start(b.benchmark.to_string()));
for (i, backup) in b.backups.iter().enumerate() {
for change in backup.changes.iter() {
steps.push(Step::from(change));
}
steps.push(Step::ManifestLive(i));
steps.push(Step::Backup(i));
let after = after_base + i;
steps.push(Step::ManifestLive(after));
steps.push(Step::CompareManifests(i, after));
}
for (i, _) in b.backups.iter().enumerate() {
steps.push(Step::Restore(i));
let restored = restore_base + i;
steps.push(Step::ManifestRestored(restored));
steps.push(Step::CompareManifests(i, restored));
}
steps.push(Step::Stop(b.benchmark.to_string()));
}
steps
}
}