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Aditya Menon 4f275b3667
feat: add Helm 4 support while maintaining Helm 3 compatibility (#2262) 
This commit adds comprehensive support for Helm 4 while maintaining
full backward compatibility with Helm 3. The implementation includes:

- Updated helm version detection to support both Helm 3 and Helm 4
- Added HELMFILE_HELM4 environment variable to control Helm version
- Modified helm execution paths to handle version-specific binaries
- Updated helm plugin installation to support split architecture

- Helm 4: Uses split plugin architecture (3 separate .tgz files)
  - helm-secrets.tgz
  - helm-secrets-getter.tgz
  - helm-secrets-post-renderer.tgz
- Helm 3: Continues using single plugin installation
- Updated Dockerfiles, CI workflows, and core installation code

- Helm 4 requires post-renderers to be plugins, not executable scripts
- Created Helm plugin structure for integration tests
- Updated helmfile.yaml templates to dynamically select renderer type
- Added test plugins: add-cm, add-cm1, add-cm2

- Updated integration tests for Helm 3/4 compatibility
- Created Helm 4 variant expected output files
- Fixed test determinism issues (repo cleanup between iterations)
- Added version-specific output filtering for warnings/messages

- Updated workflows to test both Helm 3 and Helm 4
- Matrix testing across Helm versions
- Updated helm-diff to v3.14.0 for compatibility

- Updated README and docs with Helm 4 information
- Added migration guidance
- Updated version requirements

All changes are backward compatible - existing Helm 3 users will
see no behavior changes.



fix: update Helm 4 lint expected output to match filtered output

The grep filter removes the semver warning, so the expected output
should not include it. Updated lint-helm4 files to match the filtered
output (warning removed, no extra blank line).

Signed-off-by: Aditya Menon <amenon@canarytechnologies.com>
 		2025-11-19 07:49:30 +08:00
..
testdata feat: add Helm 4 support while maintaining Helm 3 compatibility (#2262) 2025-11-19 07:49:30 +08:00
.gitignore feat: add duration to failed releases summary (#1066) 2023-10-12 18:49:07 -05:00
README.md Add integration test with local oci repo 2022-07-18 13:43:01 +00:00
snapshot_test.go feat: add Helm 4 support while maintaining Helm 3 compatibility (#2262) 2025-11-19 07:49:30 +08:00
tmpl_test.go Replace interface{} by any (#901) 2023-06-16 10:49:05 +09:00

README.md

This directory contains a set of Go test source and testdata to test the helmfile template's rendering result by calling helmfile build or helmfile template on test input and comparing the output against the snapshot.

The testdata directory is composed of:

  • charts: The Helm charts used from within test helmfile configs (snapshpt/*/input.yaml) as local charts and remote charts
  • snapshot/$NAME/input.yaml: The input helmfile config for the test case of $NAME
  • snapshot/$NAME/output.yaml: The expected output of the helmfile command
  • snapshot/$NAME/config.yaml: The snapshot test configuration file. See the Config struct defined in snapshot_test.go for more information