https://github.com/cf-platform-eng/marman/blob/6452f7f8552f220d34ae146efab2079cfc800c0b/Makefile#L47
Today I learnt (or realised something i knew but haven't been applying):
This is a file target
build/marman-linux: $(SRC) deps
GOARCH=amd64 GOOS=linux go build -o build/marman-linux -ldflags ${LDFLAGS} ./cmd/marman/main.go
This is a pseudo-target
build-darwin: build/marman-darwin
If you want make to be efficient, try to make sure that file targets always depend on other file targets
In the build/marman-linux target, we're depending on a pseudo-target, deps which means the go build will always be run again, despite there being nothing to do.
the fix is to move deps to the pseudo target:
build/marman-linux: $(SRC)
GOARCH=amd64 GOOS=linux go build -o build/marman-linux -ldflags ${LDFLAGS} ./cmd/marman/main.go
build-darwin: deps build/marman-darwin
OR we can establish a file target for deps using the temp/tags trick but that's not always feasable.
This isn't an immediate issue, in that building our go apps is pretty fast, but it can balloon out and cause friction when later you decide to add a slower pre-processing action to your builds.
https://github.com/cf-platform-eng/marman/blob/6452f7f8552f220d34ae146efab2079cfc800c0b/Makefile#L47
Today I learnt (or realised something i knew but haven't been applying):
This is a file target
This is a pseudo-target
If you want make to be efficient, try to make sure that file targets always depend on other file targets
In the
build/marman-linuxtarget, we're depending on a pseudo-target,depswhich means thego buildwill always be run again, despite there being nothing to do.the fix is to move
depsto the pseudo target:OR we can establish a file target for deps using the
temp/tagstrick but that's not always feasable.This isn't an immediate issue, in that building our go apps is pretty fast, but it can balloon out and cause friction when later you decide to add a slower pre-processing action to your builds.