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cmake: avoid editing t/test-lib.sh 

In 7f5397a07c (cmake: support for testing git when building out of the
source tree, 2020-06-26), we implemented support for running Git's test
scripts even after building Git in a different directory than the source
directory.

The way we did this was to edit the file `t/test-lib.sh` to override
`GIT_BUILD_DIR` to point somewhere else than the parent of the `t/`
directory.

This is unideal because it always leaves a tracked file marked as
modified, and it is all too easy to commit that change by mistake.

Let's change the strategy by teaching `t/test-lib.sh` to detect the
presence of a file called `GIT-BUILD-DIR` in the source directory. If it
exists, the contents are interpreted as the location to the _actual_
build directory. We then write this file as part of the CTest
definition.

To support building Git via a regular `make` invocation after building
it using CMake, we ensure that the `GIT-BUILD-DIR` file is deleted (for
convenience, this is done as part of the Makefile rule that is already
run with every `make` invocation to ensure that `GIT-BUILD-OPTIONS` is
up to date).

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin 2022-10-18 10:59:04 +00:00 committed by Junio C Hamano
parent 79d266223a
commit ee9e66e4e7
4 changed files with 13 additions and 6 deletions
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1
.gitignore vendored
View File

@ -2,6 +2,7 @@
/fuzz_corpora
/fuzz-pack-headers
/fuzz-pack-idx
/GIT-BUILD-DIR
/GIT-BUILD-OPTIONS
/GIT-CFLAGS
/GIT-LDFLAGS

1
Makefile
View File

@ -3028,6 +3028,7 @@ else
@echo RUNTIME_PREFIX=\'false\' >>$@+
endif
@if cmp $@+ $@ >/dev/null 2>&1; then $(RM) $@+; else mv $@+ $@; fi
@if test -f GIT-BUILD-DIR; then rm GIT-BUILD-DIR; fi
### Detect Python interpreter path changes
ifndef NO_PYTHON

7
contrib/buildsystems/CMakeLists.txt
View File

@ -1067,14 +1067,9 @@ endif()
#Make the tests work when building out of the source tree
get_filename_component(CACHE_PATH ${CMAKE_CURRENT_LIST_DIR}/../../CMakeCache.txt ABSOLUTE)
if(NOT ${CMAKE_BINARY_DIR}/CMakeCache.txt STREQUAL ${CACHE_PATH})
file(RELATIVE_PATH BUILD_DIR_RELATIVE ${CMAKE_SOURCE_DIR} ${CMAKE_BINARY_DIR}/CMakeCache.txt)
string(REPLACE "/CMakeCache.txt" "" BUILD_DIR_RELATIVE ${BUILD_DIR_RELATIVE})
#Setting the build directory in test-lib.sh before running tests
file(WRITE ${CMAKE_BINARY_DIR}/CTestCustom.cmake
"file(STRINGS ${CMAKE_SOURCE_DIR}/t/test-lib.sh GIT_BUILD_DIR_REPL REGEX \"GIT_BUILD_DIR=(.*)\")\n"
"file(STRINGS ${CMAKE_SOURCE_DIR}/t/test-lib.sh content NEWLINE_CONSUME)\n"
"string(REPLACE \"\${GIT_BUILD_DIR_REPL}\" \"GIT_BUILD_DIR=\\\"$TEST_DIRECTORY/../${BUILD_DIR_RELATIVE}\\\"\" content \"\${content}\")\n"
"file(WRITE ${CMAKE_SOURCE_DIR}/t/test-lib.sh \${content})")
"file(WRITE ${CMAKE_SOURCE_DIR}/GIT-BUILD-DIR \"${CMAKE_BINARY_DIR}\")")
#misc copies
file(COPY ${CMAKE_SOURCE_DIR}/t/chainlint.sed DESTINATION ${CMAKE_BINARY_DIR}/t/)
file(COPY ${CMAKE_SOURCE_DIR}/po/is.po DESTINATION ${CMAKE_BINARY_DIR}/po/)

10
t/test-lib.sh
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@ -47,6 +47,16 @@ then
echo "PANIC: Running in a $TEST_DIRECTORY that doesn't end in '/t'?" >&2
exit 1
fi
if test -f "$GIT_BUILD_DIR/GIT-BUILD-DIR"
then
GIT_BUILD_DIR="$(cat "$GIT_BUILD_DIR/GIT-BUILD-DIR")" || exit 1
# On Windows, we must convert Windows paths lest they contain a colon
case "$(uname -s)" in
*MINGW*)
GIT_BUILD_DIR="$(cygpath -au "$GIT_BUILD_DIR")"
;;
esac
fi
# Prepend a string to a VAR using an arbitrary ":" delimiter, not
# adding the delimiter if VAR or VALUE is empty. I.e. a generalized: