Describe the feature
Evaluate safe caching or reuse of the V compiler build artifact across GitHub Actions jobs.
Use Case
Many workflows rebuild V from scratch with make, make -j4, make && ./v symlink, or Windows makev.bat. This happens independently across many jobs and matrices.
Rebuilding V is expected in a compiler repository, but repeated identical builds across workflows and matrix jobs add up.
Proposed Solution
Experiment with opt-in build artifact caching in a low-risk workflow first.
Possible key:
key: v-build-${{ runner.os }}-${{ matrix.cc || 'default' }}-${{ hashFiles('cmd/**', 'vlib/**', 'thirdparty/**', 'make*') }}Possible cached paths:
path: |
v
v.exe
cmd/tools/builders
Start with a small workflow where stale compiler risk is low, then expand if reliable.
Other Information
Caution: compiler projects can be sensitive to stale binaries. The cache key must include all relevant source/build inputs. It may be safer to implement this after a shared setup action exists.
Acknowledgements
Version used
master as of 2026-07-18.
Environment details (OS name and version, etc.)
GitHub Actions workflow analysis using GitHub CLI from Linux.
Describe the feature
Evaluate safe caching or reuse of the V compiler build artifact across GitHub Actions jobs.
Use Case
Many workflows rebuild V from scratch with
make,make -j4,make && ./v symlink, or Windowsmakev.bat. This happens independently across many jobs and matrices.Rebuilding V is expected in a compiler repository, but repeated identical builds across workflows and matrix jobs add up.
Proposed Solution
Experiment with opt-in build artifact caching in a low-risk workflow first.
Possible key:
Possible cached paths:
Start with a small workflow where stale compiler risk is low, then expand if reliable.
Other Information
Caution: compiler projects can be sensitive to stale binaries. The cache key must include all relevant source/build inputs. It may be safer to implement this after a shared setup action exists.
Acknowledgements
Version used
masteras of 2026-07-18.Environment details (OS name and version, etc.)
GitHub Actions workflow analysis using GitHub CLI from Linux.