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use std::{collections::HashMap, ffi::OsStr, fs::File, path::Path, result};
use scoped_tls_hkt::scoped_thread_local;
use serde::{de::DeserializeOwned, Deserialize, Deserializer};
use walkdir::WalkDir;
use common::{error::*, types::*};
use crate::task::{TaskDef, TaskMeta};
scoped_thread_local!(static CURRENT_RECIPE: str);
fn current_recipe() -> String {
CURRENT_RECIPE.with(|current| current.to_string())
}
pub fn deserialize_task_id<'de, D>(deserializer: D) -> result::Result<TaskID, D::Error>
where
D: Deserializer<'de>,
{
#[derive(Deserialize)]
struct RecipeTaskID {
recipe: Option<String>,
task: String,
}
let RecipeTaskID { recipe, task } = RecipeTaskID::deserialize(deserializer)?;
Ok(TaskID {
recipe: recipe.unwrap_or_else(current_recipe),
task,
})
}
#[derive(Clone, Debug, Deserialize, Default)]
pub struct RecipeMeta {
pub name: Option<String>,
pub version: Option<String>,
}
#[derive(Debug, Deserialize)]
struct Recipe {
#[serde(default)]
pub meta: RecipeMeta,
pub tasks: HashMap<String, TaskDef>,
}
#[derive(Debug, Deserialize)]
struct Subrecipe {
pub tasks: HashMap<String, TaskDef>,
}
fn read_yaml<T: DeserializeOwned>(path: &Path) -> Result<T> {
let f = File::open(path).context("IO error")?;
let value: T = serde_yaml::from_reader(f)
.map_err(Error::new)
.context("YAML error")?;
Ok(value)
}
const RECIPE_NAME: &str = "build";
const RECIPE_PREFIX: &str = "build.";
fn recipe_name(path: &Path) -> Option<&str> {
if path.extension() != Some("yml".as_ref()) {
return None;
}
let stem = path.file_stem()?.to_str()?;
if stem == RECIPE_NAME {
return Some("");
}
stem.strip_prefix(RECIPE_PREFIX)
}
fn handle_recipe_tasks(
tasks: &mut HashMap<TaskID, Vec<TaskDef>>,
recipe_tasks: HashMap<String, TaskDef>,
meta: &TaskMeta,
) {
for (label, mut task) in recipe_tasks {
let task_id = TaskID {
recipe: meta.recipe.clone(),
task: label,
};
task.meta = meta.clone();
tasks.entry(task_id).or_default().push(task);
}
}
fn read_recipe_tasks(
path: &Path,
basename: &str,
tasks: &mut HashMap<TaskID, Vec<TaskDef>>,
) -> Result<RecipeMeta> {
let recipe_def = CURRENT_RECIPE.set(basename, || read_yaml::<Recipe>(path))?;
let name = recipe_def
.meta
.name
.as_deref()
.unwrap_or(basename)
.to_string();
let meta = TaskMeta {
basename: basename.to_string(),
recipename: "".to_string(),
recipe: basename.to_string(),
name,
version: recipe_def.meta.version.clone(),
};
handle_recipe_tasks(tasks, recipe_def.tasks, &meta);
Ok(recipe_def.meta)
}
fn read_subrecipe_tasks(
path: &Path,
basename: &str,
recipename: &str,
recipe_meta: &RecipeMeta,
tasks: &mut HashMap<TaskID, Vec<TaskDef>>,
) -> Result<()> {
let recipe = format!("{basename}/{recipename}");
let recipe_def = CURRENT_RECIPE.set(&recipe, || read_yaml::<Subrecipe>(path))?;
let name = recipe_meta.name.as_deref().unwrap_or(basename).to_string();
let meta = TaskMeta {
basename: basename.to_string(),
recipename: recipename.to_string(),
recipe: recipe.clone(),
name,
version: recipe_meta.version.clone(),
};
handle_recipe_tasks(tasks, recipe_def.tasks, &meta);
Ok(())
}
pub fn read_recipes<P: AsRef<Path>>(path: P) -> Result<HashMap<TaskID, Vec<TaskDef>>> {
let mut tasks = HashMap::<TaskID, Vec<TaskDef>>::new();
let mut recipe_metas = HashMap::<String, RecipeMeta>::new();
for entry in WalkDir::new(path)
.sort_by(|a, b| {
// Files are sorted first by stem, then by extension, so that
// recipe.yml will always be read before recipe.NAME.yml
let stem_cmp = a.path().file_stem().cmp(&b.path().file_stem());
let ext_cmp = a.path().extension().cmp(&b.path().extension());
stem_cmp.then(ext_cmp)
})
.into_iter()
.filter_map(|e| e.ok())
{
let path = entry.path();
if !path.is_file() {
continue;
}
let Some(recipename) = recipe_name(path) else {
continue;
};
let Some(basename) = path
.parent()
.and_then(Path::file_name)
.and_then(OsStr::to_str)
else {
continue;
};
if recipename.is_empty() {
recipe_metas.insert(
basename.to_string(),
read_recipe_tasks(path, basename, &mut tasks)?,
);
} else {
let Some(recipe_meta) = recipe_metas.get(basename) else {
continue;
};
read_subrecipe_tasks(path, basename, recipename, recipe_meta, &mut tasks)?;
}
}
Ok(tasks)
}
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