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| author | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2018-12-20 20:35:25 +0100 |
|---|---|---|
| committer | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2018-12-21 13:43:20 +0100 |
| commit | 681bd2c524ed71ac04045c90884ba8d55eee7b66 (patch) | |
| tree | f50b21fb487cead9833a04a307f0e4d7b54d7a8d /src/basic/meson.build | |
| parent | b9da6a098b08d4eafec239fc05e0fd2073115504 (diff) | |
| download | systemd-681bd2c524ed71ac04045c90884ba8d55eee7b66.tar.gz | |
meson: generate version tag from git
$ build/systemctl --version
systemd 239-3555-g6178cbb5b5
+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN +PCRE2 default-hierarchy=hybrid
$ git tag v240 -m 'v240'
$ ninja -C build
ninja: Entering directory `build'
[76/76] Linking target fuzz-unit-file.
$ build/systemctl --version
systemd 240
+PAM +AUDIT +SELINUX +IMA -APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN +PCRE2 default-hierarchy=hybrid
This is very useful during development, because a precise version string is
embedded in the build product and displayed during boot, so we don't have to
guess answers for questions like "did I just boot the latest version or the one
from before?".
This change creates an overhead for "noop" builds. On my laptop, 'ninja -C
build' that does nothing goes from 0.1 to 0.5 s. It would be nice to avoid
this, but I think that <1 s is still acceptable.
Fixes #7183.
PACKAGE_VERSION is renamed to GIT_VERSION, to make it obvious that this is the
more dynamically changing version string.
Why save to a file? It would be easy to generate the version tag using
run_command(), but we want to go through a file so that stuff gets rebuilt when
this file changes. If we just defined an variable in meson, ninja wouldn't know
it needs to rebuild things.
Diffstat (limited to 'src/basic/meson.build')
| -rw-r--r-- | src/basic/meson.build | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/basic/meson.build b/src/basic/meson.build index 23b5e75bd8..95a0d45450 100644 --- a/src/basic/meson.build +++ b/src/basic/meson.build @@ -1,5 +1,10 @@ # SPDX-License-Identifier: LGPL-2.1+ +version_h = vcs_tag( + command: vcs_tagger, + input : 'version.h.in', + output : 'version.h') + basic_sources = files(''' MurmurHash2.c MurmurHash2.h |