81 lines
2.6 KiB
Makefile
81 lines
2.6 KiB
Makefile
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# Set SHELL to 'strict mode' without using .SHELLFLAGS for max compatibility.
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# See https://fieldnotes.tech/how-to-shell-for-compatible-makefiles/
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SHELL := /usr/bin/env bash -euo pipefail -c
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CIRCLECI := circleci --skip-update-check
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# Set up some documentation/help message variables.
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# We do not attempt to install the CircleCI CLI from this Makefile.
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CCI_INSTALL_LINK := https://circleci.com/docs/2.0/local-cli/\#installation
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CCI_INSTALL_MSG := Please install CircleCI CLI. See $(CCI_INSTALL_LINK)
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CCI_VERSION := $(shell $(CIRCLECI) version 2> /dev/null)
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ifeq ($(CCI_VERSION),)
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# Attempting to use the CLI fails with installation instructions.
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CIRCLECI := echo '$(CCI_INSTALL_MSG)'; exit 1; \#
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endif
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SOURCE_DIR := config
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SOURCE_YML := $(shell [ ! -d $(SOURCE_DIR) ] || find $(SOURCE_DIR) -name '*.yml')
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CONFIG_SOURCE := Makefile $(SOURCE_YML) | $(SOURCE_DIR)
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OUT := config.yml
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TMP := .tmp/config-processed
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CONFIG_PACKED := .tmp/config-packed
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default: help
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help:
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@echo "Usage:"
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@echo " make ci-config: recompile config.yml from $(SOURCE_DIR)/"
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@echo " make ci-verify: verify that config.yml is a true mapping from $(SOURCE_DIR)/"
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@echo
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@echo "Diagnostics:"
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@[ -z "$(CCI_VERSION)" ] || echo " circleci-cli version $(CCI_VERSION)"
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@[ -n "$(CCI_VERSION)" ] || echo " $(CCI_INSTALL_MSG)"
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$(SOURCE_DIR):
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@echo No source directory $(SOURCE_DIR) found.; exit 1
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# Make sure our .tmp dir exists.
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$(shell [ -d .tmp ] || mkdir .tmp)
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.PHONY: ci-config
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ci-config: $(OUT)
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.PHONY: ci-verify
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ci-verify: config-up-to-date
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@$(CIRCLECI) config validate $(OUT)
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define GENERATED_FILE_HEADER
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### ***
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### WARNING: DO NOT manually EDIT or MERGE this file, it is generated by 'make ci-config'.
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### INSTEAD: Edit or merge the source in $(SOURCE_DIR)/ then run 'make ci-config'.
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### ***
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endef
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export GENERATED_FILE_HEADER
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# GEN_CONFIG writes the config to a temporary file. If the whole process succeeds,
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# it then moves that file to $@. This makes is an atomic operation, so if it fails
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# make doesn't consider a half-baked file up to date.
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define GEN_CONFIG
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@$(CIRCLECI) config pack $(SOURCE_DIR) > $(CONFIG_PACKED)
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@echo "$$GENERATED_FILE_HEADER" > $@.tmp || { rm -f $@; exit 1; }
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@$(CIRCLECI) config process $(CONFIG_PACKED) >> $@.tmp || { rm -f $@.tmp; exit 1; }
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@mv -f $@.tmp $@
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endef
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$(OUT): $(CONFIG_SOURCE)
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$(GEN_CONFIG)
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@echo "$@ updated"
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$(TMP): $(CONFIG_SOURCE)
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$(GEN_CONFIG)
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.PHONY: config-up-to-date
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config-up-to-date: $(TMP) # Note this must not depend on $(OUT)!
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@if diff config.yml $<; then \
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echo "Generated $(OUT) is up to date!"; \
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else \
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echo "Generated $(OUT) is out of date, run make $(CONFIG) to update."; \
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exit 1; \
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fi
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