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all: docs backports

.PHONY: docs
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docs:
	csplit -sf readme -n 1 .gitlab/README.md '/<INPUTS>/'
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	echo '<!-- This document is generated by `make docs` from `.gitlab/README.md` -->' > README.md
	echo >> README.md
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	cat readme0 >> README.md
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	yq '.spec.inputs | .[] | "| `" + key + "` | `" + .default + "` | " + .description + (.options | (" Must be one of " + (. | filter((. | test("\$$.*")) == false) | map("`" + . + "`") | join(", ") + "." )) // "") + " |"' templates/full-pipeline.yml >> README.md
	echo >> README.md
	echo '### Available OpenTofu Versions' >> README.md
	echo >> README.md
	echo 'The following OpenTofu versions are available with this component via the `opentofu_version` input:' >> README.md
	echo >> README.md
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	yq -r '.spec.inputs.opentofu_version.options | filter((. | test("\$$.*")) == false) | .[] | "- [`" + . + "`](https://github.com/opentofu/opentofu/releases/tag/v" + . + ")"' templates/full-pipeline.yml >> README.md
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	tail -n+2 readme1 >> README.md
	rm -f readme0 readme1 readme_inputs.md

BACKPORTS_DIR := backports
BACKPORTS_BASE_DIR := $(BACKPORTS_DIR)/OpenTofu
BACKPORTS_BASE_FILE := $(BACKPORTS_BASE_DIR)/Base.gitlab-ci.yml
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# NOTE: this make target requires GNU sed and not the mac OS sed. 
#       Install it with `brew install gnu-sed` and follow the instructions in `brew info gnu-sed` to 
#       make it the standard `sed` binary (if you wish) or temporarily alias sed=gsed
	@echo "Generating $(BACKPORTS_BASE_FILE) ..."
	@mkdir -p $(BACKPORTS_BASE_DIR)
	@cp $(BACKPORTS_DIR)/.Base.gitlab-ci.yml $(BACKPORTS_BASE_FILE)
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	@sed '1,/^---$$/d' templates/fmt.yml | sed -e 's/$$\[\[ inputs.as \]\]/.opentofu:fmt/' | sed -e 's/$$\[\[ inputs.stage \]\]/validate/' | sed -e 's/$$\[\[ inputs.allow_failure \]\]/true/' >> $(BACKPORTS_BASE_FILE)
	@sed '1,/^---$$/d' templates/validate.yml | sed -e 's/$$\[\[ inputs.as \]\]/.opentofu:validate/' | sed -e 's/$$\[\[ inputs.stage \]\]/validate/' >> $(BACKPORTS_BASE_FILE)
	@sed '1,/^---$$/d' templates/plan.yml | sed -e 's/$$\[\[ inputs.as \]\]/.opentofu:plan/' | sed -e 's/$$\[\[ inputs.stage \]\]/build/' >> $(BACKPORTS_BASE_FILE)
	@sed '1,/^---$$/d' templates/apply.yml | sed -e 's/$$\[\[ inputs.as \]\]/.opentofu:apply/' | sed -e 's/$$\[\[ inputs.stage \]\]/deploy/' | sed -e 's/$$\[\[ inputs.auto_apply \]\]/$$_TF_AUTO_APPLY/' >> $(BACKPORTS_BASE_FILE)
	@sed '1,/^---$$/d' templates/destroy.yml | sed -e 's/$$\[\[ inputs.as \]\]/.opentofu:destroy/' | sed -e 's/$$\[\[ inputs.stage \]\]/cleanup/' | sed -e 's/$$\[\[ inputs.auto_destroy \]\]/$$_TF_AUTO_DESTROY/' | sed -e 's/$$\[\[ inputs.create_destroy_job \]\]/$$TF_CREATE_DESTROY_JOB/' >> $(BACKPORTS_BASE_FILE)
	@sed '1,/^---$$/d' templates/delete-state.yml | sed -e 's/$$\[\[ inputs.as \]\]/.opentofu:delete-state/' | sed -e 's/$$\[\[ inputs.stage \]\]/cleanup/' | sed -e 's/$$\[\[ inputs.create_delete_state_job \]\]/$$TF_CREATE_DELETE_STATE_JOB/' | sed -e "/stage: cleanup/a \ \ needs: ['.opentofu:destroy']" >> $(BACKPORTS_BASE_FILE)
	
	@# Common inputs
	@sed -i $(BACKPORTS_BASE_FILE) -e 's/$$\[\[ inputs.image_registry_base \]\]/$$GITLAB_OPENTOFU_IMAGE_REGISTRY_BASE/'
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	@sed -i $(BACKPORTS_BASE_FILE) -e 's/$$\[\[ inputs.version \]\]/$$GITLAB_OPENTOFU_VERSION/'
	@sed -i $(BACKPORTS_BASE_FILE) -e 's/$$\[\[ inputs.opentofu_version \]\]/$$OPENTOFU_VERSION/'
	@sed -i $(BACKPORTS_BASE_FILE) -e 's/$$\[\[ inputs.root_dir \]\]/$$TF_ROOT/'
	@sed -i $(BACKPORTS_BASE_FILE) -e 's/$$\[\[ inputs.state_name \]\]/$$TF_STATE_NAME/'
	@sed -i $(BACKPORTS_BASE_FILE) -e '/TF_STATE_NAME: $$TF_STATE_NAME/d'
	@sed -i $(BACKPORTS_BASE_FILE) -e '/TF_ROOT: $$TF_ROOT/d'

	@# Remove empty variable blocks - yq doesn't preserve white spaces, thus the patching ...
	@yq e 'del(.*.variables | select(length==0))' backports/OpenTofu/Base.gitlab-ci.yml | diff -Bw backports/OpenTofu/Base.gitlab-ci.yml - | patch backports/OpenTofu/Base.gitlab-ci.yml -

	@echo "Generated $(BACKPORTS_BASE_FILE)"