B0_std_cli (b0.B0_std

Exits

module Exit : sig ... end

Program exits.

Argument converters

val fpath : B0_std.Fpath.t Cmdliner.Arg.conv

fpath is a converter for file paths. No existence checks are performed on the path.

val cmd : B0_std.Cmd.t Cmdliner.Arg.conv

cmd is a converter for commands.

Specifying output format

val s_output_verbosity_options : string

s_output_format_options is a manual section called "OUTPUT VERBOSITY OPTIONS"

type output_verbosity = [

| `Normal
| `Short
| `Long

]

The type for specifying output verbosity.

val output_verbosity : 
  ?docs:string ->
  ?short_opts:string list ->
  ?long_opts:string list ->
  unit ->
  output_verbosity Cmdliner.Term.t

output_verbosity ~short_opts ~long_opts () are mutually exclusive options to specify output verbosity as short or long. Without options this is `Normal. short_opts defaults to ["s"; "short"] and long_opts default to ["l"; "long"]. docs is the manual section in which options are documented, defaults to s_output_format_options.

Fragments for setting up B0_std.

TODO maybe we should just side effect in the options, it would be simpler to setup. There is now log_setup that does so. Also I think the color madness stuff should go.

Setup

Configure styled output and log verbosity and the B0_std.Os.Cmd.spawn_tracer.

val get_styler : B0_std.Fmt.styler option option -> B0_std.Fmt.styler

get_styler styler determines styler by falling back to Fmt.styler.

val get_log_level : B0_std.Log.level option -> B0_std.Log.level

get_log_level level determines level with B0_std.Log.level.Warning if level is None.

val setup : 
  B0_std.Fmt.styler ->
  B0_std.Log.level ->
  log_spawns:B0_std.Log.level ->
  unit

setup styler log_level ~log_spawns sets:

B0_std.Fmt.set_styler with styler.
B0_std.Log.set_level with log_level.
B0_std.Os.Cmd.set_spawn_tracer with B0_std.Log.spawn_tracer log_spawns iff level >= log_spawn.

Warning. If level < log_spawn but B0_std.Log.level is increased after this call, the spawns won't be traced (most cli programs do not change after the initial setup). Do your own setup if that is a problem for you.

Cli arguments

val styler_of_string : 
  string ->
  (B0_std.Fmt.styler option, string) Stdlib.result

styler_of_string v parses:

"", "auto" into None
"always" into Some `Ansi
"never" into Some `None

val color : 
  ?docs:string ->
  ?env:Cmdliner.Cmd.Env.info ->
  unit ->
  B0_std.Fmt.styler option option Cmdliner.Term.t

color ~docs ~env () is a cli interface for specifying formatting styling with a --color option. docs is where the options are documented (defaults to Cmdliner.Manpage.s_common_options). env, if provided, is an environment variable to set the value (use something like "MYPROGRAM_COLOR"). None is returned if the value is not set on the cli or via the env var.

val log_level : 
  ?none:B0_std.Log.level ->
  ?docs:Cmdliner.Manpage.section_name ->
  ?env:Cmdliner.Cmd.Env.info ->
  unit ->
  B0_std.Log.level option Cmdliner.Term.t

log_level ~none ~docs ~env () is a cli interface for specifiying a logging level with various options. docs is where the options are documented (defaults to Cmdliner.Manpage.s_common_options). env, if provided, is an environment variable to set the value (use something like "MYPROGRAM_VERBOSITY"). none is used to document the level when the log level is unspecified (defaults to Log.Warning). None is returned if the value is not set on the cli or via the env var.

val configure_log : 
  ?docs:Cmdliner.Manpage.section_name ->
  ?env:Cmdliner.Cmd.Env.info ->
  ?spawns:B0_std.Log.level Cmdliner.Term.t ->
  ?absent:B0_std.Log.level ->
  unit ->
  unit Cmdliner.Term.t

log_setup is a cli interface for specifying a logging level with various options and setting up B0_std.Log.set_level and B0_std.Os.Cmd.spawn_tracer with it.

The default value of absent is Log.Warning and the default value of spawns is Log.Debug. The default value of env is log_level_var.

val log_level_var : Cmdliner.Cmd.Env.info

log_level_var describes the default environment variable LOG_LEVEL of configure_log.