[libcamera-devel] [PATCH] meson: Really fix git version parsing

[Umang Jain]

Hi Laurent,

Thank you for the patch

On 3/22/23 11:33 PM, Laurent Pinchart via libcamera-devel wrote:
> The previous attempt to fix git version parsing in commit d34cefad1791
> ("meson: Fix git version parsing") was too naive, and didn't take into
> account cases where the libcamera git version contains no or multiple
> '+' signs.
>
> Fixing this is more complex than a one-liner change, as meson doesn't
> support Python-style slicing of arrays or a length method on strings.
> The simplest and most versatile option is to patch the version string in
> the gen-version.sh script. Do so, and clarify the comments related to
> version handling in meson.build.
>
> Fixes: d34cefad1791 ("meson: Fix git version parsing")
> Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

Looks good to me.

Reviewed-by: Umang Jain <umang.jain at ideasonboard.com>

> ---
>   meson.build          | 29 ++++++++++++++++++-----------
>   utils/gen-version.sh |  8 ++++++++
>   2 files changed, 26 insertions(+), 11 deletions(-)
>
> diff --git a/meson.build b/meson.build
> index 189e97736d90..8628e6acebee 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -11,15 +11,19 @@ project('libcamera', 'c', 'cpp',
>       license : 'LGPL 2.1+')
>   
>   # Generate version information. The libcamera_git_version variable contains the
> -# full version with git patch count and SHA1 (e.g. 1.2.3+211-c94a24f4), while
> -# the libcamera_version variable contains the major.minor.patch (e.g. 1.2.3)
> -# only. If the source tree isn't under git control, or if it matches the last
> -# git version tag, the build metadata (e.g. +211-c94a24f4) is omitted from
> -# libcamera_git_version.
> +# full version with build metadata (patch count and SHA1, e.g.
> +# 1.2.3+211-c94a24f4), while the libcamera_version variable contains the
> +# major.minor.patch (e.g. 1.2.3) only.
> +#
> +# If the source tree matches the last git version tag, the build metadata
> +# (e.g. +211-c94a24f4) is omitted from libcamera_git_version.
>   libcamera_git_version = run_command('utils/gen-version.sh',
>                                       meson.project_build_root(),
>                                       meson.project_source_root(),
>                                       check: false).stdout().strip()
> +
> +# If the source tree isn't under git control, set libcamera_git_version to the
> +# meson project version.
>   if libcamera_git_version == ''
>       libcamera_git_version = meson.project_version()
>   endif
> @@ -31,7 +35,7 @@ project_version = meson.project_version().split('+')[0]
>   # meson.project_version() could leave the project in a mis-described state.
>   # Produce a warning in this event, and fix to a best effort.
>   if libcamera_version != project_version
> -    warning('The sources disagree about the version: '
> +    warning('The sources and meson.build disagree about the version: '
>               + libcamera_version + ' != ' + project_version)
>   
>       summary({'libcamera git version' : libcamera_git_version,
> @@ -39,13 +43,16 @@ if libcamera_version != project_version
>               },
>               bool_yn : true, section : 'Versions')
>   
> -    # Replace the version components reported by git with the release version,
> -    # but keep all trailing information supplied by git.
> -    libcamera_git_version = (project_version + '+' +
> -                             libcamera_git_version.split('+')[1])
> +    # Re-run gen-version.sh to replace the git version (major.minor.patch) with
> +    # the meson project version. The build metadata provided by git are kept.
> +    libcamera_git_version = run_command('utils/gen-version.sh',
> +                                        meson.project_build_root(),
> +                                        meson.project_source_root(),
> +                                        project_version,
> +                                        check: false).stdout().strip()
>       libcamera_version = project_version
>   
> -    # Append a marker to show we have modified this version string
> +    # Append a marker to show we have modified this version string.
>       libcamera_git_version += '-nvm'
>   endif
>   
> diff --git a/utils/gen-version.sh b/utils/gen-version.sh
> index eb7c72685c54..e1f7ca7b6f01 100755
> --- a/utils/gen-version.sh
> +++ b/utils/gen-version.sh
> @@ -5,6 +5,7 @@
>   
>   build_dir="$1"
>   src_dir="$2"
> +project_version="$3"
>   
>   # If .tarball-version exists, output the version string from the file and exit.
>   # This file is auto-generated on a 'meson dist' command from the run-dist.sh
> @@ -43,6 +44,13 @@ then
>   fi
>   git diff-index --quiet HEAD || version="$version-dirty ($(date --iso-8601=seconds))"
>   
> +# If a project version is provided, use it to replace the version number.
> +if [ -n "$project_version" ]
> +then
> +	version=$(echo "$version" | sed -e 's/^[^-]*-//')
> +	version="v$project_version-$version"
> +fi
> +
>   # Replace first '-' with a '+' to denote build metadata, strip the 'g' in from
>   # of the git SHA1 and remove the initial 'v'.
>   version=$(echo "$version" | sed -e 's/-/+/' | sed -e 's/-g/-/' | cut -c 2-)
>
> base-commit: e39f046f660a6d0954d81b92bd183e7ba679fa56