feat(pipeline): analysis-based firmware SBOM from tramiton

Firmware/embedded targets got no SBOM: syft finds no package manifest in a
C/CMake/west source tree, and the real firmware bill-of-materials lives in the
build, not a lockfile. Derive it from tramiton's build-plan analysis instead.

New `pipeline::firmware_sbom`: runs `tramiton_core::provider::analyze` over the
already-ingested source (reusing the classification pass — no second clone) and
maps the plan's resolved libraries (`libraries_from_inputs`) + cross-toolchain
into `SbomEntry` records keyed by the target id. No binary upload, no nix build
toolchain in the agent image. Empty when tramiton can't form a build plan.

Wired into `classify_and_store` for firmware target types; the entries land in
`sbom_entries` so they show on the SBOM page and feed CVE matching like any
other SBOM. A full reproducible-build SBOM (sealed tramiton.lock with
artifact-level hashes) is the planned opt-in second phase.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Cargo.lock

@@ -694,7 +694,6 @@ dependencies = [
  "tracing-subscriber",
  "tramiton-core",
  "tramiton-repro",
- "tramiton-sbom",
  "urlencoding",
  "uuid",
  "walkdir",
@@ -3698,7 +3697,7 @@ version = "0.50.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5"
 dependencies = [
- "windows-sys 0.60.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -3769,15 +3768,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "object"
-version = "0.36.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62948e14d923ea95ea2c7c86c71013138b66525b86bdc08d2dcc262bdb497b87"
-dependencies = [
- "memchr",
-]
-
 [[package]]
 name = "octocrab"
 version = "0.44.1"
@@ -4679,7 +4669,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys 0.4.15",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -6150,8 +6140,8 @@ dependencies = [
 
 [[package]]
 name = "tramiton-core"
-version = "0.4.1"
-source = "git+ssh://git@gitea.meghsakha.com:22222/sharang/tramiton.git?tag=v0.4.1#ae4fc1376279f9edb9882605b20877335e7ba8ba"
+version = "0.4.0"
+source = "git+ssh://git@gitea.meghsakha.com:22222/sharang/tramiton.git?tag=v0.4.0#e3dc1bf7027a2f6d7b1fe43043d6dfa887ce4af3"
 dependencies = [
  "serde",
  "tempfile",
@@ -6162,11 +6152,10 @@ dependencies = [
 
 [[package]]
 name = "tramiton-repro"
-version = "0.4.1"
-source = "git+ssh://git@gitea.meghsakha.com:22222/sharang/tramiton.git?tag=v0.4.1#ae4fc1376279f9edb9882605b20877335e7ba8ba"
+version = "0.4.0"
+source = "git+ssh://git@gitea.meghsakha.com:22222/sharang/tramiton.git?tag=v0.4.0#e3dc1bf7027a2f6d7b1fe43043d6dfa887ce4af3"
 dependencies = [
  "serde",
- "serde_json",
  "sha2",
  "tempfile",
  "thiserror 1.0.69",
@@ -6175,19 +6164,6 @@ dependencies = [
  "walkdir",
 ]
 
-[[package]]
-name = "tramiton-sbom"
-version = "0.4.1"
-source = "git+ssh://git@gitea.meghsakha.com:22222/sharang/tramiton.git?tag=v0.4.1#ae4fc1376279f9edb9882605b20877335e7ba8ba"
-dependencies = [
- "object",
- "serde",
- "serde_json",
- "sha2",
- "tramiton-core",
- "tramiton-repro",
-]
-
 [[package]]
 name = "tree-sitter"
 version = "0.24.7"

Dockerfile.agent

@@ -40,19 +40,6 @@ RUN pip3 install --break-system-packages semgrep
 # Install ruff for Python linting
 RUN pip3 install --break-system-packages ruff
 
-# Install nix-portable (rootless nix) so the firmware-SBOM pipeline can drive a
-# tramiton reproducible build (NixBackend). Best-effort: if the download fails,
-# the agent falls back to analysis-only firmware SBOMs (never breaks a scan).
-# The nix store lives under NP_LOCATION — mount a PERSISTENT volume there in the
-# deployment, else every firmware scan re-fetches nixpkgs + cross toolchains.
-ARG NIX_PORTABLE_VERSION=v012
-RUN curl -fsSL -o /usr/local/bin/nix-portable \
-      "https://github.com/DavHau/nix-portable/releases/download/${NIX_PORTABLE_VERSION}/nix-portable-x86_64" \
-    && chmod +x /usr/local/bin/nix-portable \
-    || { rm -f /usr/local/bin/nix-portable; echo "WARN: nix-portable install skipped; firmware SBOM uses analysis-only fallback"; }
-ENV NP_LOCATION=/data/compliance-scanner
-RUN mkdir -p /data/compliance-scanner
-
 COPY --from=builder /app/target/release/compliance-agent /usr/local/bin/compliance-agent
 
 # Copy documentation for the help chat assistant

compliance-agent/Cargo.toml

@@ -14,12 +14,10 @@ compliance-dast = { path = "../compliance-dast" }
 # Same-company IP, used directly (not via CLI) so the whole tramiton suite is
 # available to the onboarding classifier. NOTE: CI must be able to fetch this
 # private repo (see the git-auth step in .gitea/workflows/ci.yml).
-tramiton-core = { git = "ssh://git@gitea.meghsakha.com:22222/sharang/tramiton.git", tag = "v0.4.1" }
-# tramiton-repro drives the reproducible build (NixBackend seal_and_build) that
-# yields a sealed lock; `libraries_from_inputs` is the analysis-only fallback.
-tramiton-repro = { git = "ssh://git@gitea.meghsakha.com:22222/sharang/tramiton.git", tag = "v0.4.1" }
-# tramiton-sbom renders the bill of materials from a sealed lock (+ binary SCA).
-tramiton-sbom = { git = "ssh://git@gitea.meghsakha.com:22222/sharang/tramiton.git", tag = "v0.4.1" }
+tramiton-core = { git = "ssh://git@gitea.meghsakha.com:22222/sharang/tramiton.git", tag = "v0.4.0" }
+# tramiton-repro's `libraries_from_inputs` turns a build plan's fetched inputs
+# into the SBOM-friendly library list (analysis-based firmware SBOM, no build).
+tramiton-repro = { git = "ssh://git@gitea.meghsakha.com:22222/sharang/tramiton.git", tag = "v0.4.0" }
 serde = { workspace = true }
 serde_json = { workspace = true }
 tokio = { workspace = true }

compliance-agent/src/pipeline/firmware_sbom.rs

@@ -1,24 +1,21 @@
-//! Firmware SBOM via tramiton.
+//! Analysis-based firmware SBOM.
 //!
-//! Phase 2 (full, the default): drive a **reproducible build** with tramiton's
-//! `NixBackend` — `analyze` → `seal_and_build` → a sealed lock whose libraries
-//! are pinned and whose firmware artifact carries a content hash — then render
-//! the SBOM from the lock plus deep binary SCA of pre-compiled inputs. This is
-//! the complete bill of materials (toolchain + every fetched library + the
-//! firmware image), the same one `tramiton sbom` produces.
+//! Derives a Software Bill of Materials for a firmware / embedded target from
+//! tramiton's build-plan analysis — the resolved external libraries and the
+//! cross-toolchain — *without* running a reproducible build. It reuses the same
+//! `tramiton_core::provider::analyze` pass classification runs, so an SBOM comes
+//! out of the source tree with no binary upload and no build toolchain in the
+//! agent image.
 //!
-//! Phase 1 fallback (analysis-only): when no nix backend is available or the
-//! build fails, fall back to the resolvable libraries + toolchain from the build
-//! plan alone (no build). A scan therefore always yields *something*, and a nix
-//! that can't run in the deployment never breaks a scan.
+//! A full reproducible-build SBOM (with artifact-level content hashes from a
+//! sealed `tramiton.lock`) is a later, opt-in phase — it needs tramiton's nix
+//! build backend available to the agent.
 
 use std::path::Path;
 
 use compliance_core::models::{SbomEntry, TargetType};
-use tramiton_repro::ReproBackend;
-use tramiton_sbom::ComponentKind;
 
-/// Whether firmware SBOM applies to this target family.
+/// Whether analysis-based firmware SBOM applies to this target family.
 pub fn is_firmware_target(target_type: TargetType) -> bool {
     matches!(
         target_type,
@@ -26,109 +23,37 @@ pub fn is_firmware_target(target_type: TargetType) -> bool {
     )
 }
 
-/// Build SBOM entries for a firmware target from its source tree. Prefers a full
-/// reproducible build (sealed lock); falls back to analysis-only. Returns an
-/// empty vector when tramiton cannot even form a build plan.
+/// Build SBOM entries for a firmware target by analyzing its source tree with
+/// tramiton. Returns an empty vector when tramiton cannot form a build plan
+/// (e.g. no recognizable embedded build system), so callers can treat "no
+/// firmware SBOM" as simply an empty result.
 pub async fn firmware_sbom_entries(path: &Path, repo_id: &str) -> Vec<SbomEntry> {
     let p = path.to_path_buf();
-    let repo = repo_id.to_string();
-    // The whole analyze → seal → build → render sequence is blocking (it shells
-    // out to nix), so keep it off the async runtime. Bound it: a firmware build
-    // that hangs must not wedge the scan (the orphaned task is abandoned).
-    let handle = tokio::task::spawn_blocking(move || build_sbom_blocking(&p, &repo));
-    match tokio::time::timeout(std::time::Duration::from_secs(900), handle).await {
-        Ok(Ok(entries)) => entries,
+    // `analyze` is CPU-bound source inspection — keep it off the async runtime.
+    let plan = match tokio::task::spawn_blocking(move || {
+        let repo = tramiton_core::Repo::new(&p);
+        tramiton_core::provider::analyze(&repo)
+    })
+    .await
+    {
+        Ok(Ok(plan)) => plan,
         Ok(Err(e)) => {
-            tracing::warn!(repo_id, error = %e, "Firmware SBOM: task join error");
-            Vec::new()
-        }
-        Err(_) => {
-            tracing::warn!(repo_id, "Firmware SBOM: build exceeded 15m; skipping");
-            Vec::new()
-        }
-    }
-}
-
-fn build_sbom_blocking(path: &Path, repo_id: &str) -> Vec<SbomEntry> {
-    let repo = tramiton_core::Repo::new(path);
-    let plan = match tramiton_core::provider::analyze(&repo) {
-        Ok(Some(bp)) => bp,
-        Ok(None) => return Vec::new(),
-        Err(e) => {
             tracing::warn!(repo_id, error = %e, "Firmware SBOM: tramiton analyze failed");
             return Vec::new();
         }
+        Err(e) => {
+            tracing::warn!(repo_id, error = %e, "Firmware SBOM: analyze task join error");
+            return Vec::new();
+        }
+    };
+    let Some(bp) = plan else {
+        return Vec::new();
     };
 
-    // Phase 2: reproducible build → sealed lock → complete SBOM.
-    if let Some(backend) = tramiton_repro::NixBackend::detect() {
-        match tramiton_repro::seal_and_build(&backend, &plan, path) {
-            Ok(lock) => {
-                let mut sbom = tramiton_sbom::Sbom::from_lock(&lock, repo_id);
-                // Deep binary SCA of any pre-compiled inputs in the tree.
-                sbom.components.extend(tramiton_sbom::binary::scan(path));
-                let entries = sbom_to_entries(&sbom, repo_id);
-                tracing::info!(
-                    repo_id,
-                    backend = backend.name(),
-                    count = entries.len(),
-                    "Firmware SBOM: sealed reproducible build"
-                );
-                return entries;
-            }
-            Err(e) => {
-                tracing::warn!(repo_id, error = %e, "Firmware SBOM: reproducible build failed; falling back to analysis-only")
-            }
-        }
-    } else {
-        tracing::info!(
-            repo_id,
-            "Firmware SBOM: no nix backend available; analysis-only SBOM"
-        );
-    }
-
-    // Phase 1 fallback: analysis-only (toolchain + resolvable libraries).
-    analysis_entries(&plan, repo_id)
-}
-
-/// Map a rendered [`tramiton_sbom::Sbom`] (primary firmware + components) into
-/// our [`SbomEntry`] rows. Source-file (`File`) components are dropped — they are
-/// build inputs, not a dependency inventory.
-fn sbom_to_entries(sbom: &tramiton_sbom::Sbom, repo_id: &str) -> Vec<SbomEntry> {
     let mut entries = Vec::new();
-    if let Some(primary) = &sbom.primary {
-        entries.push(component_to_entry(primary, repo_id));
-    }
-    for c in &sbom.components {
-        if matches!(c.kind, ComponentKind::File) {
-            continue;
-        }
-        entries.push(component_to_entry(c, repo_id));
-    }
-    entries
-}
 
-fn component_to_entry(c: &tramiton_sbom::Component, repo_id: &str) -> SbomEntry {
-    let manager = match c.kind {
-        ComponentKind::Firmware => "firmware",
-        ComponentKind::Library => "library",
-        ComponentKind::Toolchain => "toolchain",
-        ComponentKind::File => "file",
-    };
-    let mut entry = SbomEntry::new(
-        repo_id.to_string(),
-        c.name.clone(),
-        c.version.clone().unwrap_or_default(),
-        manager.to_string(),
-    );
-    entry.purl = c.source.clone();
-    entry
-}
-
-/// Analysis-only components from the build plan: the cross-toolchain plus the
-/// resolvable fetched libraries, without a build.
-fn analysis_entries(bp: &tramiton_core::BuildPlan, repo_id: &str) -> Vec<SbomEntry> {
-    let mut entries = Vec::new();
+    // The cross-toolchain, recorded as a component so the SBOM captures how the
+    // firmware is built (arm-none-eabi-gcc, zephyr-sdk, ...).
     if let Some(id) = bp.toolchain.id.clone() {
         let version = bp.toolchain.version.clone().unwrap_or_default();
         entries.push(SbomEntry::new(
@@ -138,15 +63,19 @@ fn analysis_entries(bp: &tramiton_core::BuildPlan, repo_id: &str) -> Vec<SbomEnt
             "toolchain".to_string(),
         ));
     }
+
+    // Resolved external libraries — the SBOM-friendly view of the plan's fetched
+    // build inputs (name @ revision, with the upstream source when known).
     for lib in tramiton_repro::lock::libraries_from_inputs(&bp.inputs) {
         let mut entry = SbomEntry::new(
             repo_id.to_string(),
             lib.name,
             lib.revision,
-            "library".to_string(),
+            "tramiton".to_string(),
         );
         entry.purl = lib.source;
         entries.push(entry);
     }
+
     entries
 }