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cmake: add reftable ref storage support to GetGitRevisionDescription

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The script assumed Git's traditional loose refs or packed-refs format.
When cloning with extensions.refstorage=reftable, neither .git/refs/*
nor .git/packed-refs exist, causing cmake configuration to fail.

Fall back to git rev-parse when file-based ref lookup fails.
This commit is contained in:
Fredrik Foss-Indrehus
2025-12-11 14:30:12 +01:00
committed by Sam Lantinga
parent 76dfb85407
commit bdb72bb3f0
2 changed files with 20 additions and 2 deletions
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6
cmake/GetGitRevisionDescription.cmake.in
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@@ -25,19 +25,21 @@ if(HEAD_CONTENTS MATCHES "ref")
string(REPLACE "ref: " "" HEAD_REF "${HEAD_CONTENTS}")
if(EXISTS "@GIT_DIR@/${HEAD_REF}")
configure_file("@GIT_DIR@/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY)
else()
elseif(EXISTS "@GIT_DIR@/packed-refs")
configure_file("@GIT_DIR@/packed-refs" "@GIT_DATA@/packed-refs" COPYONLY)
file(READ "@GIT_DATA@/packed-refs" PACKED_REFS)
if(${PACKED_REFS} MATCHES "([0-9a-z]*) ${HEAD_REF}")
set(HEAD_HASH "${CMAKE_MATCH_1}")
endif()
elseif(EXISTS "@GIT_DIR@/reftable/tables.list")
configure_file("@GIT_DIR@/reftable/tables.list" "@GIT_DATA@/reftable-tables.list" COPYONLY)
endif()
else()
# detached HEAD
configure_file("@GIT_DIR@/HEAD" "@GIT_DATA@/head-ref" COPYONLY)
endif()
if(NOT HEAD_HASH)
if(NOT HEAD_HASH AND EXISTS "@GIT_DATA@/head-ref")
file(READ "@GIT_DATA@/head-ref" HEAD_HASH LIMIT 1024)
string(STRIP "${HEAD_HASH}" HEAD_HASH)
endif()