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(Makefiles) Re-implement Git version handling

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Better (more fine-grained) logic for version_git.o regeneration.
This commit is contained in:
Hugo Hromic 2020-07-21 23:08:43 +01:00
parent 49b7a03335
commit 4205e73c9a
2 changed files with 21 additions and 7 deletions
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1
.gitignore vendored
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@ -8,6 +8,7 @@
*.dol
*.map
*.swp
*.cache
.tmp
.tmp.c
.tmp.cxx

27
Makefile.common
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@ -158,15 +158,28 @@ ifeq ($(TARGET), retroarch_3ds)
endif
# Git Version
GIT_VERSION_CACHEDIR = $(if $(OBJDIR),$(OBJDIR),$(CURDIR))
GIT_VERSION_CACHEFILE = $(GIT_VERSION_CACHEDIR)/git-version.cache
GIT_VERSION := $(shell git rev-parse --short HEAD 2>/dev/null)
ifneq ($(GIT_VERSION),)
_CACHEDIR = $(if $(OBJDIR),$(OBJDIR),$(CURDIR))
_LAST_GIT_VERSION := $(shell cat "$(_CACHEDIR)"/last-git-version 2>/dev/null)
ifneq ($(GIT_VERSION),$(_LAST_GIT_VERSION))
ifneq (,$(wildcard .git/index)) # Building inside a Git repository?
GIT_VERSION := $(shell git rev-parse --short HEAD 2>/dev/null)
endif
ifneq (,$(wildcard $(GIT_VERSION_CACHEFILE))) # Cached Git version?
GIT_VERSION_CACHE = $(shell cat "$(GIT_VERSION_CACHEFILE)" 2>/dev/null)
endif
ifeq ($(GIT_VERSION),)
ifneq ($(GIT_VERSION_CACHE),) # If no Git version, use cached if found
GIT_VERSION = $(GIT_VERSION_CACHE)
endif
endif
ifneq ($(GIT_VERSION),) # Enable version_git.o?
ifneq ($(GIT_VERSION),$(GIT_VERSION_CACHE)) # Update version_git.o?
$(shell \
mkdir -p "$(_CACHEDIR)"; \
echo "$(GIT_VERSION)" > "$(_CACHEDIR)"/last-git-version; \
mkdir -p "$(GIT_VERSION_CACHEDIR)" && \
echo "$(GIT_VERSION)" > "$(GIT_VERSION_CACHEFILE)" && \
touch version_git.c)
endif
DEFINES += -DHAVE_GIT_VERSION -DGIT_VERSION=$(GIT_VERSION)