build: add support for automatically removing build dir contents during build

This is used to save space on buildbot instances.
If any part of a package needs to be rebuild, the whole package is
rebuilt from scratch. Stamp files are preserved to allow dependency
checks to work

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2017-01-18 15:37:57 +01:00
parent c150a190f5
commit 7a523569f7
4 changed files with 32 additions and 3 deletions

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@ -39,6 +39,14 @@ menuconfig DEVEL
help
Automatically rebuild packages when their files change.
config AUTOREMOVE
bool "Automatic removal of build directories" if DEVEL
default n
help
Automatically delete build directories after make target completed.
This allows you to symlink build_dir into a scratch location, e.g. a ramdisk,
which does not have enough space to keep a complete build_dir.
config BUILD_SUFFIX
string "Build suffix to append to the target BUILD_DIR variable" if DEVEL
default ""

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@ -211,6 +211,12 @@ define Build/CoreTargets
.configure: $(STAMP_CONFIGURED)
.dist: $(STAMP_CONFIGURED)
.distcheck: $(STAMP_CONFIGURED)
ifneq ($(CONFIG_AUTOREMOVE),)
compile:
$(FIND) $(PKG_BUILD_DIR) -mindepth 1 -maxdepth 1 -not '(' -type f -and -name '.*' -and -size 0 ')' -and -not -name '.pkgdir' | \
$(XARGS) rm -rf
endif
endef
define Build/DefaultTargets

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@ -29,6 +29,11 @@ endef
lastdir=$(word $(words $(subst /, ,$(1))),$(subst /, ,$(1)))
diralias=$(if $(findstring $(1),$(call lastdir,$(1))),,$(call lastdir,$(1)))
subdir_make_opts = \
-r -C $(1) \
BUILD_SUBDIR="$(1)" \
BUILD_VARIANT="$(4)"
# 1: subdir
# 2: target
# 3: build type
@ -38,11 +43,19 @@ log_make = \
$(if $(BUILD_LOG), \
set -o pipefail; \
mkdir -p $(BUILD_LOG_DIR)/$(1)$(if $(4),/$(4));) \
$$(SUBMAKE) -r -C $(1) $(if $(3),$(3)-)$(2) \
BUILD_SUBDIR="$(1)" \
BUILD_VARIANT="$(4)" \
$$(SUBMAKE) $(subdir_make_opts) $(if $(3),$(3)-)$(2) \
$(if $(BUILD_LOG),SILENT= 2>&1 | tee $(BUILD_LOG_DIR)/$(1)$(if $(4),/$(4))/$(if $(3),$(3)-)$(2).txt)
ifdef CONFIG_AUTOREMOVE
rebuild_check = \
@-$$(NO_TRACE_MAKE) $(subdir_make_opts) check-depends >/dev/null 2>/dev/null; \
$(if $(BUILD_LOG),mkdir -p $(BUILD_LOG_DIR)/$(1)$(if $(4),/$(4));) \
$$(NO_TRACE_MAKE) $(if $(BUILD_LOG),-d) -q $(subdir_make_opts) .$(if $(3),$(3)-)$(2) \
> $(if $(BUILD_LOG),$(BUILD_LOG_DIR)/$(1)$(if $(4),/$(4))/check-$(if $(3),$(3)-)$(2).txt,/dev/null) 2>&1 || \
$$(SUBMAKE) $(subdir_make_opts) clean >/dev/null 2>/dev/null
endif
# Parameters: <subdir>
define subdir
$(call warn,$(1),d,D $(1))
@ -58,6 +71,7 @@ define subdir
$(call warn_eval,$(1)/$(bd),t,T,$(1)/$(bd)/$(target): $(if $(QUILT),,$($(1)/$(bd)/$(target)) $(call $(1)//$(target),$(1)/$(bd))))
$(foreach variant,$(if $(BUILD_VARIANT),$(BUILD_VARIANT),$(if $(strip $($(1)/$(bd)/variants)),$($(1)/$(bd)/variants),$(if $($(1)/$(bd)/default-variant),$($(1)/$(bd)/default-variant),__default))),
$(if $(BUILD_LOG),@mkdir -p $(BUILD_LOG_DIR)/$(1)/$(bd)/$(filter-out __default,$(variant)))
$(if $($(1)/autoremove),$(call rebuild_check,$(1)/$(bd),$(target),,$(filter-out __default,$(variant))))
$(call log_make,$(1)/$(bd),$(target),,$(filter-out __default,$(variant))) \
$(if $(findstring $(bd),$($(1)/builddirs-ignore-$(target))), || $(call ERROR,$(1), ERROR: $(1)/$(bd) failed to build$(if $(filter-out __default,$(variant)), (build variant: $(variant))).))
)

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@ -10,6 +10,7 @@ curdir:=package
include $(INCLUDE_DIR)/rootfs.mk
-include $(TMP_DIR)/.packagedeps
$(curdir)/autoremove:=1
$(curdir)/builddirs:=$(sort $(package-) $(package-y) $(package-m))
$(curdir)/builddirs-install:=.
$(curdir)/builddirs-default:=. $(sort $(package-y) $(package-m))