Docker CI containers run as root by default (golang:1.26-alpine), where
os.Chmod has no effect and permission restrictions don't apply. Four
tests were failing because they relied on chmod to force error paths:
- gradle: TestWriteVersionReadOnly
- cmd: TestInitConfigWriteFails, TestRunLatestTagFails
- gitutil: TestLatestTagTagsIterFails (had broken skip logic that only
fired if Chmod itself errored, which never happens as root)
Replace all four with an upfront os.Getuid() == 0 check so they are
skipped cleanly in root environments and still run (and must pass) on
non-root local development.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add internal/gradle package with ReadVersion and WriteVersion for
build.gradle (Groovy DSL, single-quoted) and build.gradle.kts (Kotlin
DSL, double-quoted). Quote style is preserved on write. regexp.QuoteMeta
ensures version strings with dots or special characters are safe.
Config follows the established multi-value pattern:
- gradle.build_file: single path (opt-in, no default)
- gradle.build_files: list for multi-module projects (overrides build_file)
- --gradle flag overrides build_file and clears build_files
100% per-package statement coverage maintained across all 13 packages;
FuzzReadVersion and FuzzWriteVersion added per fuzzing guidelines.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
k3nny