mbox series

[0/3] Add missing SRCREV check for SCM URIs

Message ID 20260519090918.235880-1-saisneha196@gmail.com
Headers show
Series Add missing SRCREV check for SCM URIs | expand

Message

Sai Sneha May 19, 2026, 9:09 a.m. UTC 
This patch series adds a check for git:// (and other SCM) URIs in
SRC_URI that are missing a corresponding SRCREV, addressing
Bugzilla #16051 [1] and building on Corentin Guillevic's RFC series [2].

== Problem ==

A recipe with a git:// URI and no SRCREV causes two problems:

1. Under BB_NO_NETWORK=1, parsing fails with a FetchError that halts
   parsing of ALL recipes, not just the offending one. This breaks CI
   pipelines that use "bitbake --parse-only" as a sanity check, which
   was the original motivation reported by Ross Burton [3].

2. Without BB_NO_NETWORK, BitBake silently queries the remote
   repository on every parse, breaking reproducibility.

== Why the trivial fix doesn't work ==

The obvious fix of checking SRCREV in insane.bbclass do_recipe_qa
was attempted by Corentin Guillevic [2] but fails because
fetcher_hashes_dummyfunc[vardepvalue] expands SRCREV at parse time
BEFORE QA checks run. This triggers get_autorev() which causes:

  "AUTOREV/SRCPV set too late for the fetcher to work properly"

This was confirmed by Mathieu Dubois-Briand's autobuilder testing [2].
Corentin's series needed 4 patches including devtool/recipetool
workarounds to paper over the expansion crash.

== This series' approach ==

We intercept at the vardepvalue expansion point itself in base.bbclass:

  fetcher_hashes_dummyfunc[vardepvalue] = \
    "${@bb.fetch.get_hashvalue(d) if check_srcrev_set(d) else ''}"

check_srcrev_set() uses d.getVar(candidate, False) — the False flag
prevents expansion entirely, so get_autorev() is never triggered and
no network access occurs. This solves the root cause in one patch
without needing devtool/recipetool changes.

== Design decisions ==

1. Why not use srcrev_internal_helper()?

   srcrev_internal_helper() expands SRCREV internally, which triggers
   get_autorev() and live git ls-remote calls — exactly what we are
   trying to prevent. We intentionally use d.getVar(candidate, False)
   instead. Our fallback chain mirrors BitBake's resolution order
   exactly, as confirmed by BitBake's own error messages:
     SRCREV_default:pn-X, SRCREV_default, SRCREV:pn-X, SRCREV

2. Why duplicate warnings at parse time AND QA time?

   Parse-time warnings (base.bbclass) are necessary for CI pipelines
   running "bitbake --parse-only" with BB_NO_NETWORK=1 — they would
   miss the issue entirely if only QA-time warnings existed.
   QA-time warnings (insane.bbclass) are necessary for proper
   WARN_QA/ERROR_QA layer control and QA framework integration.
   This pattern is already established — src-uri-bad fires at both
   parse and QA time.

3. Why hardcode git/gitsm/hg/svn schemes?

   These are the fetchers that require SRCREV. This is a known
   limitation — if new SCM fetchers are added in future, this list
   will need updating. Noted as a follow-on improvement.

== Enforcement levels ==

  Normal builds, all layers  →  WARN_QA   (warning, build continues)
  oe-core layer              →  ERROR_QA  (error, strict enforcement)
  yocto-check-layer runs     →  ERROR     (layer validation fails)

This matches the graduated enforcement requested in Bug 16051
Comments 2 and 3.

== Testing ==

Tested on openembedded-core with:

- Recipe with missing SRCREV → WARNING/ERROR at parse time ✓
- Recipe with SRCREV = "${AUTOREV}" → silent passthrough ✓
- Recipe with rev= in URI → no false positive ✓
- Recipe with multiple SCM URIs → all missing SRCREVs reported ✓
- oe-core recipe → ERROR instead of WARNING ✓
- yocto-check-layer on layer with missing SRCREV → FAIL ✓
- 952 other recipes parse cleanly → 0 errors ✓

[1] https://bugzilla.yoctoproject.org/show_bug.cgi?id=16051
[2] https://lore.kernel.org/openembedded-core/20260304104342.869457-1-corentin.guillevic@smile.fr/
[3] https://lists.openembedded.org/g/openembedded-devel/topic/115911777

Sai Sneha (3):
  base.bbclass: warn when SRCREV is missing for SCM URIs at parse time
  insane.bbclass: add missing-srcrev QA check for SCM URIs
  yocto-check-layer.bbclass: enforce missing SRCREV check during layer validation

 meta/classes-global/base.bbclass             | 40 +++++++++++++++++++
 meta/classes-global/insane.bbclass           | 32 +++++++++++++++
 meta/classes-global/yocto-check-layer.bbclass| 32 +++++++++++++++
 3 files changed, 104 insertions(+), 2 deletions(-)