Migrate to libherokubuildpack inventory

Cargo.toml

@@ -3,7 +3,6 @@ resolver = "2"
 members = [
     "buildpacks/go",
     "common/go-utils",
-    "common/inventory-utils",
 ]
 
 [workspace.package]

buildpacks/go/Cargo.toml

@@ -8,13 +8,12 @@ workspace = true
 
 [dependencies]
 heroku-go-utils = { path = "../../common/go-utils" }
-heroku-inventory-utils = { path = "../../common/inventory-utils" }
 hex = "0.4.3"
 flate2 = { version = "1", default-features = false, features = ["zlib"] }
 # libcnb has a much bigger impact on buildpack behaviour than any other dependencies,
 # so it's pinned to an exact version to isolate it from lockfile refreshes.
 libcnb = { version = "=0.21.0", features = ["trace"] }
-libherokubuildpack = { version = "=0.21.0", default-features = false, features = ["log"] }
+libherokubuildpack = { version = "=0.24.0", default-features = false, features = ["inventory", "log"] }
 semver = "1"
 serde = "1"
 sha2 = "0.10"

buildpacks/go/src/layers/dist.rs

@@ -1,25 +1,25 @@
 use crate::{tgz, GoBuildpack, GoBuildpackError};
 use heroku_go_utils::vrs::GoVersion;
-use heroku_inventory_utils::inv::Artifact;
 use libcnb::build::BuildContext;
 use libcnb::data::layer_content_metadata::LayerTypes;
 use libcnb::layer::{ExistingLayerStrategy, Layer, LayerData, LayerResult, LayerResultBuilder};
 use libcnb::layer_env::{LayerEnv, ModificationBehavior, Scope};
 use libcnb::Buildpack;
+use libherokubuildpack::inventory::artifact::Artifact;
 use libherokubuildpack::log::log_info;
 use serde::{Deserialize, Serialize};
 use sha2::Sha256;
 use std::path::Path;
 
 /// A layer that downloads and installs the Go distribution artifacts
 pub(crate) struct DistLayer {
-    pub(crate) artifact: Artifact<GoVersion, Sha256>,
+    pub(crate) artifact: Artifact<GoVersion, Sha256, Option<()>>,
 }
 
 #[derive(Deserialize, Serialize, Clone, PartialEq, Eq)]
 pub(crate) struct DistLayerMetadata {
     layer_version: String,
-    artifact: Artifact<GoVersion, Sha256>,
+    artifact: Artifact<GoVersion, Sha256, Option<()>>,
 }
 
 #[derive(thiserror::Error, Debug)]
@@ -48,8 +48,8 @@ impl Layer for DistLayer {
         layer_path: &Path,
     ) -> Result<LayerResult<Self::Metadata>, GoBuildpackError> {
         log_info(format!(
-            "Installing {} from {}",
-            self.artifact, self.artifact.url
+            "Installing {} ({}-{}) from {}",
+            self.artifact.version, self.artifact.os, self.artifact.arch, self.artifact.url
         ));
         tgz::fetch_strip_filter_extract_verify(
             &self.artifact,
@@ -84,7 +84,10 @@ impl Layer for DistLayer {
         layer_data: &LayerData<Self::Metadata>,
     ) -> Result<ExistingLayerStrategy, <Self::Buildpack as Buildpack>::Error> {
         if layer_data.content_metadata.metadata == DistLayerMetadata::current(self) {
-            log_info(format!("Reusing {}", self.artifact));
+            log_info(format!(
+                "Reusing {} ({}-{})",
+                self.artifact.version, self.artifact.os, self.artifact.arch
+            ));
             Ok(ExistingLayerStrategy::Keep)
         } else {
             Ok(ExistingLayerStrategy::Recreate)

buildpacks/go/src/main.rs

@@ -5,7 +5,6 @@ mod proc;
 mod tgz;
 
 use heroku_go_utils::vrs::GoVersion;
-use heroku_inventory_utils::inv::{resolve, Arch, Inventory, Os};
 use layers::build::{BuildLayer, BuildLayerError};
 use layers::deps::{DepsLayer, DepsLayerError};
 use layers::dist::{DistLayer, DistLayerError};
@@ -19,6 +18,8 @@ use libcnb::generic::GenericMetadata;
 use libcnb::generic::GenericPlatform;
 use libcnb::layer_env::Scope;
 use libcnb::{buildpack_main, Buildpack, Env};
+use libherokubuildpack::inventory::artifact::{Arch, Os};
+use libherokubuildpack::inventory::Inventory;
 use libherokubuildpack::log::{log_error, log_header, log_info};
 use sha2::Sha256;
 use std::env::{self, consts};
@@ -63,7 +64,7 @@ impl Buildpack for GoBuildpack {
                 go_env.insert(k, v);
             });
 
-        let inv: Inventory<GoVersion, Sha256> =
+        let inv: Inventory<GoVersion, Sha256, Option<()>> =
             toml::from_str(INVENTORY).map_err(GoBuildpackError::InventoryParse)?;
 
         let config = cfg::read_gomod_config(context.app_dir.join("go.mod"))
@@ -72,12 +73,15 @@ impl Buildpack for GoBuildpack {
         log_info(format!("Detected Go version requirement: {requirement}"));
 
         let artifact = match (consts::OS.parse::<Os>(), consts::ARCH.parse::<Arch>()) {
-            (Ok(os), Ok(arch)) => resolve(inv.artifacts.as_slice(), os, arch, &requirement),
+            (Ok(os), Ok(arch)) => inv.resolve(os, arch, &requirement),
             (_, _) => None,
         }
         .ok_or(GoBuildpackError::VersionResolution(requirement.clone()))?;
 
-        log_info(format!("Resolved Go version: {artifact}"));
+        log_info(format!(
+            "Resolved Go version: {} ({}-{})",
+            artifact.version, artifact.os, artifact.arch
+        ));
 
         log_header("Installing Go distribution");
         go_env = context

buildpacks/go/src/tgz.rs

@@ -1,13 +1,12 @@
 use flate2::read::GzDecoder;
+use libherokubuildpack::inventory::artifact::Artifact;
 use sha2::{
     digest::{generic_array::GenericArray, OutputSizeUser},
     Digest,
 };
 use std::{fs, io::Read, path::StripPrefixError};
 use tar::Archive;
 
-use heroku_inventory_utils::inv::Artifact;
-
 #[derive(thiserror::Error, Debug)]
 pub(crate) enum Error {
     #[error("HTTP error while fetching archive: {0}")]
@@ -44,7 +43,7 @@ pub(crate) enum Error {
 ///
 /// See `Error` for an enumeration of error scenarios.
 pub(crate) fn fetch_strip_filter_extract_verify<'a, D: Digest, V>(
-    artifact: &Artifact<V, D>,
+    artifact: &Artifact<V, D, Option<()>>,
     strip_prefix: impl AsRef<str>,
     filter_prefixes: impl Iterator<Item = &'a str>,
     dest_dir: impl AsRef<std::path::Path>,
@@ -113,25 +112,26 @@ impl<R: Read, H: sha2::Digest> Read for DigestingReader<R, H> {
 
 #[cfg(test)]
 mod tests {
-    use heroku_inventory_utils::{
+    use libherokubuildpack::inventory::{
+        artifact::{Arch, Os},
         checksum::Checksum,
-        inv::{Arch, Os},
     };
     use sha2::Sha256;
 
     use super::*;
 
     #[test]
     fn test_fetch_strip_filter_extract_verify() {
-        let artifact = Artifact::<String, Sha256> {
+        let artifact = Artifact::<String, Sha256, Option<()>> {
             version: "0.0.1".to_string(),
             os: Os::Linux,
             arch: Arch::Amd64,
             url: "https://mirrors.edge.kernel.org/pub/software/scm/git/git-0.01.tar.gz".to_string(),
-            checksum: Checksum::try_from(
-                "9bdf8a4198b269c5cbe4263b1f581aae885170a6cb93339a2033cb468e57dcd3".to_string(),
-            )
-            .unwrap(),
+            checksum: "sha256:9bdf8a4198b269c5cbe4263b1f581aae885170a6cb93339a2033cb468e57dcd3"
+                .to_string()
+                .parse::<Checksum<Sha256>>()
+                .unwrap(),
+            metadata: None,
         };
         let dest = tempfile::tempdir().expect("Couldn't create test tmpdir");
 

common/go-utils/Cargo.toml

@@ -14,4 +14,4 @@ serde = { version = "1", features = ["derive"] }
 thiserror = "1"
 toml = "0.8"
 ureq = { version = "2", features = ["json"] }
-heroku-inventory-utils = { path = "../../common/inventory-utils" }
+libherokubuildpack = { version = "=0.24.0", default-features = false, features = ["inventory", "log", "inventory-sha2"] }

common/go-utils/src/bin/update_inventory.rs

@@ -2,9 +2,9 @@
 #![allow(unused_crate_dependencies)]
 
 use heroku_go_utils::{inv::list_upstream_artifacts, vrs::GoVersion};
-use heroku_inventory_utils::inv::{read_inventory_file, Artifact, Inventory};
+use libherokubuildpack::inventory::{artifact::Artifact, Inventory};
 use sha2::Sha256;
-use std::{collections::HashSet, env, fs, process};
+use std::{env, fs, process};
 
 /// Updates the local go inventory.toml with versions published on go.dev.
 fn main() {
@@ -13,15 +13,17 @@ fn main() {
         process::exit(2);
     });
 
-    let inventory_artifacts: HashSet<Artifact<GoVersion, Sha256>> =
-        read_inventory_file(&inventory_path)
-            .unwrap_or_else(|e| {
-                eprintln!("Error reading inventory at '{inventory_path}': {e}");
-                std::process::exit(1);
-            })
-            .artifacts
-            .into_iter()
-            .collect();
+    let inventory_artifacts = fs::read_to_string(&inventory_path)
+        .unwrap_or_else(|e| {
+            eprintln!("Error reading inventory at '{inventory_path}': {e}");
+            std::process::exit(1);
+        })
+        .parse::<Inventory<GoVersion, Sha256, Option<()>>>()
+        .unwrap_or_else(|e| {
+            eprintln!("Error parsing inventory file at '{inventory_path}': {e}");
+            process::exit(1);
+        })
+        .artifacts;
 
     // List available upstream release versions.
     let remote_artifacts = list_upstream_artifacts().unwrap_or_else(|e| {
@@ -43,25 +45,33 @@ fn main() {
         process::exit(7);
     });
 
-    let remote_artifacts: HashSet<Artifact<GoVersion, Sha256>> =
+    let remote_artifacts: Vec<Artifact<GoVersion, Sha256, Option<()>>> =
         inventory.artifacts.into_iter().collect();
 
     [
-        ("Added", &remote_artifacts - &inventory_artifacts),
-        ("Removed", &inventory_artifacts - &remote_artifacts),
+        ("Added", difference(&remote_artifacts, &inventory_artifacts)),
+        (
+            "Removed",
+            difference(&inventory_artifacts, &remote_artifacts),
+        ),
     ]
     .iter()
     .filter(|(_, artifact_diff)| !artifact_diff.is_empty())
     .for_each(|(action, artifacts)| {
-        let mut list: Vec<&Artifact<GoVersion, Sha256>> = artifacts.iter().collect();
+        let mut list: Vec<_> = artifacts.iter().collect();
         list.sort_by_key(|a| &a.version);
         println!(
             "{} {}.",
             action,
             list.iter()
-                .map(ToString::to_string)
+                .map(|artifact| format!("{} ({}-{})", artifact.version, artifact.os, artifact.arch))
                 .collect::<Vec<_>>()
                 .join(", ")
         );
     });
 }
+
+/// Finds the difference between two slices.
+fn difference<'a, T: Eq>(a: &'a [T], b: &'a [T]) -> Vec<&'a T> {
+    a.iter().filter(|&artifact| !b.contains(artifact)).collect()
+}