Re: [PATCH] Add code to Mercurial VCS backend to show topic if there is any.

[Manuel Jacob <me@xxxxxxxxxxxxxx>]

On 2020-06-07 09:44, Manuel Jacob wrote:
> "Topics" is an experimental concept in Mercurial that augments the
> current branching concept (called "named branches").
>
> For more information, see the not always up-to-date Mercurial Wiki page
> https://www.mercurial-scm.org/wiki/TopicPlan.
> ---
>  Functions/VCS_Info/Backends/VCS_INFO_get_data_hg | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/Functions/VCS_Info/Backends/VCS_INFO_get_data_hg
> b/Functions/VCS_Info/Backends/VCS_INFO_get_data_hg
> index cd5ef321d..e898f7298 100644
> --- a/Functions/VCS_Info/Backends/VCS_INFO_get_data_hg
> +++ b/Functions/VCS_Info/Backends/VCS_INFO_get_data_hg
> @@ -5,7 +5,7 @@
>
>  setopt localoptions extendedglob NO_shwordsplit
>
> -local hgbase bmfile branchfile rebasefile dirstatefile mqseriesfile \
> +local hgbase bmfile branchfile topicfile rebasefile dirstatefile 
> mqseriesfile \
>      curbmfile curbm \
>      mqstatusfile mqguardsfile patchdir mergedir \
>      r_csetid r_lrev r_branch i_bmhash i_bmname \
> @@ -27,6 +27,7 @@ mergedir="${hgbase}/.hg/merge/"
>  bmfile="${hgbase}/.hg/bookmarks"
>  curbmfile="${hgbase}/.hg/bookmarks.current"
>  branchfile="${hgbase}/.hg/branch"
> +topicfile="${hgbase}/.hg/topic"
>  rebasefile="${hgbase}/.hg/rebasestate"
>  dirstatefile="${hgbase}/.hg/dirstate"
>  mqstatusfile="${patchdir}/status" # currently applied patches
> @@ -69,6 +70,13 @@ fi
>  # If we still don't know the branch it's safe to assume default
>  [[ -n ${r_branch} ]] || r_branch="default"
>
> +# Show topic if there is any (the UI for this experimental concept is 
> not yet
> +# final, but for a long time the convention has been to join the 
> branch name
> +# and the topic name by a colon)
> +if [[ -r ${topicfile} ]] ; then

I've sent a v2 of this patch that properly handles a zero .hg/topic 
file, which means "no topic set" (the same as no .hg/topic file).

> +    r_branch=${r_branch}:$(< ${topicfile})
> +fi
> +
>  # The working dir has uncommitted-changes if the revision ends with a 
> +
>  if [[ $r_lrev[-1] == + ]] ; then
>      hgchanges=1