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meson: fix regression that broke extracting version (#1253)

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* meson: fix regression that broke extracting version

In commit 33f67386fec8040a36a26b2038b39dd8dcf2814d the code that
heuristically parsed the version broke due to the version being moved
around into a more easily accessible define.

While we are at it, pass the exact path of httplib.h to un-break usage
as a meson subproject. This was broken in commit
8ecdb1197967dea050fd38a8e9b5020e02320b31 which checked the return code
of trying to get the version; it was always broken, but formerly failed
in silence and resulted in no version number.

* meson: use the compiler builtins to extract the version from the header

As a convenient string define, it is now possible to ask the
preprocessor what the version of cpp-httplib is. This can be used from
meson too, in order to avoid encoding C++ file structure into python
regexes.
This commit is contained in:
Eli Schwartz 2022-04-19 07:11:51 -04:00 committed by GitHub
parent d87abeecf0
commit abf3a67dd0
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1 changed files with 5 additions and 6 deletions
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@ -21,12 +21,11 @@ project(
version = meson.project_version() version = meson.project_version()
python3 = find_program('python3') python3 = find_program('python3')
if version == 'undefined' if version == 'undefined'
# Meson doesn't have regular expressions, but since it is implemented cxx = meson.get_compiler('cpp')
# in python we can be sure we can use it to parse the file manually version = cxx.get_define('CPPHTTPLIB_VERSION',
version = run_command( prefix: '#include <httplib.h>',
python3, '-c', 'import re; raw_version = re.search("User\-Agent.*cpp\-httplib/([0-9]+\.?)+", open("httplib.h").read()).group(0); print(re.search("([0-9]+\\.?)+", raw_version).group(0))', include_directories: include_directories('.')).strip('"')
check: true assert(version != '', 'failed to get version from httplib.h')
).stdout().strip()
endif endif
message('cpp-httplib version ' + version) message('cpp-httplib version ' + version)