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feat(helm): adding helm-diff target #470

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a8ec8c0
adding helm-diff target
hjoshi123 Nov 3, 2025
b18327f
Fix helm-diff target so it runs and filters as intended
wallrj Aug 10, 2026
f9a8ff0
Address review feedback on helm-diff
wallrj Aug 10, 2026
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18 changes: 18 additions & 0 deletions modules/helm/helm.mk
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,8 @@ helm_chart_sources := $(shell find $(helm_chart_source_dir) -maxdepth 1 -type f)
helm_chart_archive := $(bin_dir)/scratch/helm/$(helm_chart_name)-$(helm_chart_version).tgz
helm_digest_path := $(bin_dir)/scratch/helm/$(helm_chart_name)-$(helm_chart_version).digests
helm_digest = $(shell head -1 $(helm_digest_path) 2> /dev/null)
HELM_IGNORE_FIELDS ?= ^Pulled:|^Digest:|app.kubernetes.io/version|helm.sh/chart|chart:|appVersion:|managed-by:|meta.helm.sh/release-namespace
helm_chart_old_version ?=

$(bin_dir)/scratch/helm:
@mkdir -p $@
Expand Down Expand Up @@ -187,3 +189,19 @@ verify-helm-kubeconform: $(helm_chart_archive) | $(NEEDS_KUBECONFORM)
-strict

shared_verify_targets_dirty += verify-helm-kubeconform

## Diff the locally built Helm chart against a released version,
## ignoring version-label noise. Set helm_chart_old_version to the
## previously released chart version to compare against.
## @category [shared] Helm Chart
.PHONY: helm-diff
helm-diff: $(helm_chart_archive) | $(NEEDS_HELM)
@if [ -z "$(helm_chart_old_version)" ]; then \
echo "Usage: make helm-diff helm_chart_old_version=<version>"; \
exit 1; \
fi
@$(HELM) show chart "oci://$(helm_chart_image_registry)$(helm_chart_name)" --version "$(helm_chart_old_version)" > /dev/null
@diff -u \
<($(HELM) template "oci://$(helm_chart_image_registry)$(helm_chart_name)" --version "$(helm_chart_old_version)" $(INSTALL_OPTIONS) | grep -vE -- '$(HELM_IGNORE_FIELDS)') \
<($(HELM) template "$(helm_chart_archive)" $(INSTALL_OPTIONS) | grep -vE -- '$(HELM_IGNORE_FIELDS)') \
|| [ $$? -eq 1 ]
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