wip3

src/layout.rs

@@ -0,0 +1,131 @@
+use std::{
+    fs,
+    path::{Path, PathBuf},
+};
+
+use anyhow::Context;
+use sha2::{Digest, Sha256};
+
+use crate::recipe::{OutputPackage, Recipe};
+
+pub struct Layout<'a> {
+    pub root: &'a Path,
+    pub arch: &'a str,
+}
+
+impl<'a> Layout<'a> {
+    pub fn new(root: &'a Path, arch: &'a str) -> Self {
+        Self { root, arch }
+    }
+
+    pub fn source_cache_dir(&self) -> PathBuf {
+        self.root.join("build/cache/sources")
+    }
+
+    pub fn source_cache_path(&self, key: &str) -> PathBuf {
+        self.source_cache_dir().join(key)
+    }
+
+    pub fn source_workdir(&self, recipe: &Recipe) -> PathBuf {
+        self.root.join("build/sources").join(recipe.slug())
+    }
+
+    pub fn build_workdir(&self, recipe: &Recipe) -> PathBuf {
+        self.root.join("build/builds").join(recipe.slug())
+    }
+
+    pub fn host_install_dir(&self, recipe: &Recipe) -> PathBuf {
+        self.root
+            .join("build/host-pkgs")
+            .join(recipe.slug())
+            .join("usr/local")
+    }
+
+    pub fn host_install_root(&self, recipe: &Recipe) -> PathBuf {
+        self.root.join("build/host-pkgs").join(recipe.slug())
+    }
+
+    pub fn apk_path(&self, recipe: &Recipe, output: &OutputPackage) -> PathBuf {
+        self.root.join("build/pkgs").join(self.arch).join(format!(
+            "{}-{}-r{}.apk",
+            output.name(),
+            recipe.version(),
+            recipe.revision()
+        ))
+    }
+
+    pub fn source_stamp(&self, recipe: &Recipe, kind: &str) -> PathBuf {
+        self.root
+            .join("build/sources")
+            .join(format!("{}.{kind}", recipe.slug()))
+    }
+
+    pub fn recipe_task_stamp(&self, recipe: &Recipe, kind: &str) -> PathBuf {
+        self.root
+            .join("build/tasks")
+            .join(format!("{}.{kind}", recipe.slug()))
+    }
+
+    pub fn output_task_stamp(&self, output: &OutputPackage, kind: &str) -> PathBuf {
+        self.root
+            .join("build/tasks")
+            .join(format!("{}.{kind}", output.key().replace(':', "-")))
+    }
+
+    pub fn recipe_fingerprint(&self, recipe: &Recipe) -> anyhow::Result<String> {
+        let mut hasher = Sha256::new();
+        hasher.update(self.arch.as_bytes());
+        hasher.update(recipe.key().as_bytes());
+        hasher.update(recipe.version().as_bytes());
+        hasher.update(recipe.revision().to_le_bytes());
+        hasher.update(
+            fs::read(recipe.path())
+                .with_context(|| format!("reading recipe {}", recipe.path().display()))?,
+        );
+        for (name, source) in recipe.sources().entries() {
+            hasher.update(name.unwrap_or("").as_bytes());
+            hasher.update(source.url().as_bytes());
+            hasher.update(source.cache_key().as_bytes());
+        }
+        for patch in self.recipe_patches(recipe)? {
+            hasher.update(patch.display().to_string().as_bytes());
+            hasher
+                .update(fs::read(&patch).with_context(|| format!("reading {}", patch.display()))?);
+        }
+        Ok(hex::encode(hasher.finalize()))
+    }
+
+    pub fn output_fingerprint(
+        &self,
+        recipe: &Recipe,
+        output: &OutputPackage,
+    ) -> anyhow::Result<String> {
+        let mut hasher = Sha256::new();
+        hasher.update(self.recipe_fingerprint(recipe)?.as_bytes());
+        hasher.update(output.key().as_bytes());
+        Ok(hex::encode(hasher.finalize()))
+    }
+
+    pub fn recipe_has_patches(&self, recipe: &Recipe) -> anyhow::Result<bool> {
+        Ok(!self.recipe_patches(recipe)?.is_empty())
+    }
+
+    pub fn recipe_patches(&self, recipe: &Recipe) -> anyhow::Result<Vec<PathBuf>> {
+        let patches_dir = recipe.dir().join("patches");
+        if !patches_dir.exists() {
+            return Ok(Vec::new());
+        }
+        let mut patches = Vec::new();
+        for entry in fs::read_dir(&patches_dir)
+            .with_context(|| format!("reading patches directory {}", patches_dir.display()))?
+        {
+            let entry = entry?;
+            let path = entry.path();
+            if path.is_file() {
+                patches.push(path);
+            }
+        }
+        patches.sort();
+        Ok(patches)
+    }
+}