RFR: cli: add trees command

[Magnus Ihse Bursie]

Interesting idea. I think you missed a proper implementation of tconfig, 
though, if you want backwards compatibility:

magnusi at sthihse:/localhome/hg/jdk-ALT$ hg tconfig --help
hg tconfig [OPTION]... [SUBTREE]...

list or change the subtrees configuration

     One of five operations can be selected:

     --list :    list the configured subtrees; this is the default if no 
other
                 operation is selected.
     --add :     add the specified subtrees to the configuration.
     --del :     delete the specified subtrees from the configuration. Use
                 --del --all to delete all subtrees.
     --set :     set the subtree configuration to the specified 
subtrees. Use
                 --set --walk to walk the filesystem rooted at REPO and set
                 the subtree configuration to the discovered repos. Use
                 --depth to write the subtree configuration depth-most, so
                 that each subtree is defined within the nearest enclosing
                 repository.  Note that --walk and --depth may be used
                 together.
     --expand :  list the value of config items from the [trees] 
section. Items
                 in the [trees] section can be defined in terms of other 
items
                 in the [trees] section; tconfig --expand shows the
                 recursively expanded value.  It returns 0 if at least one
                 config item was found; otherwise it returns 1.

     Note that with the slight exception of --set --depth, this command does
     not recurse into subtrees; it operates only on the current repository.
     (To recursively list subtrees, use the tlist command.)

options:

  -a --add           add the specified SUBTREEs to config
     --all           with --del, delete all subtrees from config
  -d --del           delete the specified SUBTREEs from config
  -e --expand        recursively expand config items in the [trees] section
  -l --list          list the configured subtrees
     --depth         store subtree configuration depth-most
  -s --set           set the subtree config to SUBTREEs
     --tns NAMESPACE trees namespace to use
  -w --walk          walk the filesystem to discover subtrees
     --mq            operate on patch repository

(some details hidden, use --verbose to show complete help)

Your code seems to do automatic configuration, which is probably an 
improvment :-) (but not backwards compatibility).

It's also unclear what the "tconfig = tree config" alias means.

It's not at all clear that we want or need backwards compatibility here. 
But if not, then the tconfig command should probably be removed.

/Magnus

On 2020-04-24 11:27, Erik Helin wrote:
> Hi all,
>
> please review this patch that adds
> [trees](https://hg.openjdk.java.net/code-tools/trees) functionality to Skara.
> This is mainly for those who want to use Skara for working with Mercurial today
> and are missing the trees functionality, but I also added a couple of trees
> "commands" like `tstatus`. `tpull` etc. to `skara.gitconfig`.
>
> Testing:
> - Manual testing of both Mercurial and Git trees commands
>
> Thanks,
> Erik
>
> -------------
>
> Commit messages:
>   - cli: add trees command
>
> Changes: https://git.openjdk.java.net/skara/pull/599/files
>   Webrev: https://webrevs.openjdk.java.net/skara/599/webrev.00
>    Stats: 222 lines in 5 files changed: 210 ins; 0 del; 12 mod
>    Patch: https://git.openjdk.java.net/skara/pull/599.diff
>    Fetch: git fetch https://git.openjdk.java.net/skara pull/599/head:pull/599
>
> PR: https://git.openjdk.java.net/skara/pull/599