[dpdk-dev] [PATCH] doc: allow sphinx build with no DPDK version

[Bruce Richardson]

On Thu, Nov 19, 2020 at 10:41:56AM +0000, Anatoly Burakov wrote:
> Currently, when building sphinx documentation, the build will only
> succeed if being run from the build system, because the conf.py script
> expects DPDK_VERSION environment variable to be set, and crashes if it
> is not.
> 
> However, there are certain external tools (such as sphinx documentation
> preview extensions for certain IDE's) that use live preview and thus
> rely on running their own sphinx commands. In these cases, it is useful
> to permit building sphinx documentation without specifying the
> DPDK_VERSION environment variable. The version string is the only thing
> preventing manual sphinx build commands from working.
> 
> Fix the conf.py to use "None" as a version string in cases when
> DPDK_VERSION environment variable is not set.
> 
> Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
> ---
>  doc/guides/conf.py | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/doc/guides/conf.py b/doc/guides/conf.py
> index 9de490e1c4..aceeb62a4f 100644
> --- a/doc/guides/conf.py
> +++ b/doc/guides/conf.py
> @@ -36,7 +36,7 @@
>  html_show_copyright = False
>  highlight_language = 'none'
>  
> -release = environ['DPDK_VERSION']
> +release = environ.setdefault('DPDK_VERSION', "None")
>  version = release

Since this is python, we can probably pull the value from the VERSION file
on the FS if it's not specified in the environment. However, for now in
terms of solving this problem, this version is ok.

Acked-by: Bruce Richardson <bruce.richardson at intel.com>