zsh: recurse over subcommand

[skshetry]

I was just able to make it work with DVC, still unsure if recursing through ArgumentParser is correct here (consider this as a WIP for now, more testing is required).

You can try it out with dvc. Closes #33.

Example output for dvc metrics

```sh #compdef dvc # AUTOMATCALLY GENERATED by `shtab` _shtab_dvc() { local context state line curcontext="$curcontext" _arguments -C $_shtab_dvc_options \ ': :_shtab_dvc_commands' \ '*::: :->dvc' case $state in dvc) words=($line[1] "${words[@]}") (( CURRENT += 1 )) curcontext="${curcontext%:*:*}:_shtab_dvc-$line[1]:" case $line[1] in metrics) _shtab_dvc_metrics ;; params) _shtab_dvc_params ;; plots) _shtab_dvc_plots ;; esac esac } _shtab_dvc_metrics() { local context state line curcontext="$curcontext" _arguments -C $_shtab_dvc_metrics_options \ ': :_shtab_dvc_metrics_commands' \ '*::: :->metrics' case $state in metrics) words=($line[1] "${words[@]}") (( CURRENT += 1 )) curcontext="${curcontext%:*:*}:_shtab_dvc_metrics-$line[1]:" case $line[1] in diff) _arguments -C $_shtab_dvc_metrics_diff_options ;; show) _arguments -C $_shtab_dvc_metrics_show_options ;; esac esac } _shtab_dvc_commands() { local _commands=( "metrics:Commands to display and compare metrics." "params:Commands to display params." "plots:Commands to visualize and compare plot metrics in structured files (JSON, YAML, CSV, TSV)." ) _describe 'dvc commands' _commands } _shtab_dvc_metrics_commands() { local _commands=( "diff:Show changes in metrics between commits in the DVC repository, or between a commit and the workspace." "show:Print metrics, with optional formatting." ) _describe 'dvc metrics commands' _commands } _shtab_dvc_options=( "*"{-q,--quiet}"[Be quiet.]" "*"{-v,--verbose}"[Be verbose.]" "(- :)"{-h,--help}"[Show this help message and exit.]" {-V,--version}"[Show program\'s version.]:version:" "--cd[Change to directory before executing.]:cd:" ) _shtab_dvc_metrics_options=( "(- :)"{-h,--help}"[show this help message and exit]" "*"{-q,--quiet}"[Be quiet.]" "*"{-v,--verbose}"[Be verbose.]" ) _shtab_dvc_metrics_diff_options=( "(- :)"{-h,--help}"[show this help message and exit]" "*"{-q,--quiet}"[Be quiet.]" "*"{-v,--verbose}"[Be verbose.]" "--targets[Specific metrics file(s) to compare (even if not found as \`metrics\` in \`dvc.yaml\`). Using -R, directories to search metrics files in can also be given.Shows all tracked metrics by default.]:targets:_files" {-R,--recursive}"[If any target is a directory, recursively search and process metrics files.]" "--all[Show unchanged metrics as well.]" {--json,--show-json}"[Show output in JSON format.]" {--md,--show-md}"[Show tabulated output in the Markdown format (GFM).]" "--no-path[Don\'t show metric path.]" "--precision[Round metrics to \`n\` digits precision after the decimal point. Rounds to 5 digits by default.]:precision:" ":Old Git commit to compare (defaults to HEAD):" ":New Git commit to compare (defaults to the current workspace):" ) _shtab_dvc_metrics_show_options=( "(- :)"{-h,--help}"[show this help message and exit]" "*"{-q,--quiet}"[Be quiet.]" "*"{-v,--verbose}"[Be verbose.]" {-a,--all-branches}"[Show metrics for all branches.]" {-T,--all-tags}"[Show metrics for all tags.]" {-A,--all-commits}"[Show metrics for all commits.]" {--json,--show-json}"[Show output in JSON format.]" {--md,--show-md}"[Show tabulated output in the Markdown format (GFM).]" {-R,--recursive}"[If any target is a directory, recursively search and process metrics files.]" "--precision[Round metrics to \`n\` digits precision after the decimal point. Rounds to 5 digits by default.]:precision:" "(*)::Limit command scope to these metrics files. Using -R, directories to search metrics files in can also be given.:_files" ) # Custom Preamble # End Custom Preamble typeset -A opt_args _shtab_dvc "$@" ```

[casperdcl]

/tag v1.5.4 cf19980

[efiop]

@skshetry Outstanding work 🔥