Aditya Menon 70645e0622 fix: array merge regression - layer arrays now replace defaults (#2367) ...

* fix: array merge regression - layer arrays now replace defaults (#2353)

PR #2288 introduced element-by-element array merging to fix #2281, but this
caused a regression where layer/environment arrays were merged instead of
replacing base arrays entirely.

This fix uses automatic sparse array detection:
- Arrays with nil values (from --state-values-set) merge element-by-element
- Arrays without nils (from layer YAML) replace entirely

This follows Helm's documented behavior where arrays replace rather than merge.

Signed-off-by: Aditya Menon <amenon@canarytechnologies.com>

* fix: use separate CLIOverrides field for element-by-element array merging

The previous approach using ArrayMergeStrategySparse detection didn't work
for --state-values-set array[0]=value because setting index 0 produces no
nils in the array.

This fix adds a CLIOverrides field to Environment that keeps CLI values
separate from layer values. CLI overrides are merged last using
ArrayMergeStrategyMerge (always element-by-element), while layer values
use the default strategy (arrays replace).

This ensures:
- --state-values-set array[0]=x only changes index 0, preserving other elements
- Layer/environment file arrays still replace base arrays entirely
- Issue #2281 fix is preserved (--state-values-set array[1].field=x works)

Signed-off-by: Aditya Menon <amenon@canarytechnologies.com>

* fix: correct comment about array merge strategy in test

Signed-off-by: Aditya Menon <amenon@canarytechnologies.com>

* fix: propagate Defaults in multi-part helmfiles and fix merge order

- Add Defaults field merging from ctxEnv to preserve base values across
  helmfile parts separated by ---
- Fix merge order: current part values now correctly override previous
  parts (was reversed, causing older values to win)
- Update 147 snapshot test files for new Environment log format with
  CLIOverrides field

This completes the fix for issue #2353 by ensuring:
1. Layer arrays replace entirely (not element-by-element merge)
2. CLI --state-values-set sparse arrays still merge element-by-element
3. Multi-part helmfiles properly inherit and override values

Signed-off-by: Aditya Menon <amenon@canarytechnologies.com>

* fix: address Copilot review comments

- Initialize EmptyEnvironment with empty maps to match New() constructor
- Update test comment to accurately describe ArrayMergeStrategySparse

Signed-off-by: Aditya Menon <amenon@canarytechnologies.com>

* fix: ensure templates access merged values via .Environment.Values

This commit fixes a regression in the CLIOverrides integration where
templates accessing .Environment.Values couldn't see CLI override values.

Changes:
- Remove CLIOverrides-into-Values merge from Merge() to keep proper
  layering order (Defaults → Values → CLIOverrides) in GetMergedValues()
- Update NewEnvironmentTemplateData to set envCopy.Values to the merged
  values, ensuring templates see the same values via both .Values and
  .Environment.Values

This ensures:
- Issue #2353: Layer arrays still replace entirely (Sparse strategy)
- Issue #2281: CLI sparse arrays still merge element-by-element
- Templates can access CLI overrides via .Environment.Values

Signed-off-by: Aditya Menon <amenon@canarytechnologies.com>

* docs: improve mergeSlices documentation per Copilot review

Address Copilot review comments on PR #2367:
- Document empty array edge case: explicitly setting [] clears base array
- Document recursive strategy propagation for nested map merging
- Add comprehensive behavior description for all array merge strategies

Signed-off-by: Aditya Menon <amenon@canarytechnologies.com>

* fix: use merged values when rendering environment value files

Environment value files (*.yaml.gotmpl) can reference CLI values via
.Values. Previously, only env.Values was passed to template rendering,
which didn't include CLIOverrides.

Now we call env.GetMergedValues() to get Defaults + Values + CLIOverrides
before rendering, so templates can access CLI values like:
  --state-values-set foo=bar

This fixes the state-values-set-cli-args-in-environments integration test.

Signed-off-by: Aditya Menon <amenon@canarytechnologies.com>

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Signed-off-by: Aditya Menon <amenon@canarytechnologies.com>

2026-01-18 14:04:54 +08:00

..

log

fix: array merge regression - layer arrays now replace defaults (#2367)

2026-01-18 14:04:54 +08:00