Yann Autissier
55fae625d6
Two mechanisms, matching what the make engine actually did:
Lazy defaults. A stack setting is a function myos_default_<VAR>, called only
when the variable has no value, and called again at every reference. That is
exactly a recursive ?=: an explicit value wins, and the default follows a
DOMAIN that a .env changes later. The prefix is what makes it safe; the first
version used a bare function named after the variable, and the test suite
caught it running /usr/bin/host for a stack group called host.
Templates. myos env-update fills a .env from the .env.dist files, expanding
${VAR} against the current values and running $(command), forward references
included.
Also fixed: the project .env now wins over /etc/conf.d/myos, which is what the
documentation claimed and the code did not.
share/make/shim.mk lets a project keep make as a front end: every myos command
becomes a target that shells out to bin/myos, and the project keeps its own
targets and its stack .mk files. It sits outside make/ because the legacy
engine globs every .mk in there.
58 lines
2.0 KiB
Makefile
58 lines
2.0 KiB
Makefile
##
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# myos, from make.
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#
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# This file gives a project the myos commands as make targets, without the make
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# engine: every target shells out to bin/myos, which is pure POSIX sh. What the
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# project keeps from make is what make is actually good at, and the CLI is not:
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# its own targets, its own dependencies, and the .mk files of its stacks.
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#
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# MYOS ?= /usr/local/lib/myos
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# include $(MYOS)/share/make/shim.mk
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#
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# It lives outside make/ on purpose: the legacy engine includes every .mk of
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# that directory, and would pull this one in too.
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#
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# Then `make up STACK=host` and `myos up host` do the same thing, through the
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# same code. Variables given on the command line are forwarded, so
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# `make up STACK=host DOMAIN=example.org` behaves as expected.
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MYOS ?= $(patsubst %/share/make/shim.mk,%,$(lastword $(MAKEFILE_LIST)))
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MYOS_BIN ?= $(MYOS)/bin/myos
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STACK_DIR_NAME ?= stack
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STACK_DIR ?= $(wildcard $(CURDIR)/$(STACK_DIR_NAME))
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# variable MYOS_ARGS: variables set on the make command line, forwarded to myos
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MYOS_ARGS ?= $(foreach v,$(MAKEOVERRIDES),$(v))
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.DEFAULT_GOAL := help
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## the stack files of the project may add their own targets and variables
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include $(wildcard $(STACK_DIR)/*.mk $(STACK_DIR)/*/*.mk)
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# function make: run a myos command, for the stack .mk files that call it
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define make
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$(MYOS_BIN) $(MYOS_ARGS) $(1)
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endef
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# target help: List the myos commands
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.PHONY: help
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help:
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@$(MYOS_BIN) help
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# target myos: Run an arbitrary myos command, as in `make myos ARGS="up host"`
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.PHONY: myos
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myos:
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@$(MYOS_BIN) $(MYOS_ARGS) $(ARGS)
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# make tries to remake every makefile it read, and the catch-all below would
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# hand each of them to myos as a command. An empty rule stops that.
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$(MAKEFILE_LIST): ;
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# target %: Hand anything else to myos
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## a target the project defines itself keeps precedence over this rule
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%: FORCE
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@$(MYOS_BIN) $(MYOS_ARGS) $@ $(ARGS)
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.PHONY: FORCE
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FORCE: ;
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