Module OpamConsole

Console output, ANSI color, logging and user querying

Global configuration parameters (read from OpamGlobalConfig, and the environment when necessary)

val debug : unit -> bool
val verbose : unit -> bool
val color : unit -> bool
val utf8 : unit -> bool
val utf8_extended : unit -> bool
val disp_status_line : unit -> bool

General text formatting

type text_style = [
  1. | `black
  2. | `blue
  3. | `bold
  4. | `crossed
  5. | `cyan
  6. | `green
  7. | `magenta
  8. | `red
  9. | `underline
  10. | `white
  11. | `yellow
]

Settable attributes for ANSI terminal output. Nesting is generally not handled.

val colorise : text_style -> string -> string

Helper coloring functions. Returns the string unchanged if color is disabled

val colorise' : text_style list -> string -> string
val acolor : text_style -> unit -> string -> string
val acolor_w : int -> text_style -> Format.formatter -> string -> unit
module Symbols : sig ... end
val utf8_symbol : OpamCompat.Uchar.t -> ?alternates:OpamCompat.Uchar.t list -> string -> string

Logging

val timer : unit -> unit -> float

Timers, only active when debug is on. Returns the time between the application to each argument, in seconds

val log : string -> ?level:int -> ('a, Format.formatter, unit) format -> 'a

log section ~level fmt args. Used for debug messages, default level is 1

val slog : ('a -> string) -> Format.formatter -> 'a -> unit

Helper to pass stringifiers to log (use log "%a" (slog to_string) x rather than log "%s" (to_string x) to avoid costly unneeded stringifications

val error : ('a, unit, string, unit) format4 -> 'a
val warning : ('a, unit, string, unit) format4 -> 'a
val note : ('a, unit, string, unit) format4 -> 'a
val errmsg : ('a, unit, string, unit) format4 -> 'a

Message without prefix, reformat or newline, to stderr (useful to continue error messages without repeating "ERROR")

val error_and_exit : OpamStd.Sys.exit_reason -> ('a, unit, string, 'b) format4 -> 'a
val msg : ('a, unit, string, unit) format4 -> 'a
val formatted_msg : ?indent:int -> ('a, unit, string, unit) format4 -> 'a
val header_msg : ('a, unit, string, unit) format4 -> 'a
val header_error : ('a, unit, string, ('b, unit, string, unit) format4 -> 'b) format4 -> 'a
val carriage_delete : unit -> unit

Erase the current line on stdout (doesn't flush stdout)

val status_line : ('a, unit, string, unit) format4 -> 'a

Display a dynamic status line to stdout, that will be erased on next call. The message should not be wider than screen nor contain newlines. Use clear_status when the status line should be erased.

val clear_status : unit -> unit

Erase the status line and restore the cursor to the start of the line

val confirm : ?default:bool -> ('a, unit, string, bool) format4 -> 'a

Ask the user to press Y/y/N/n to continue (returns a boolean). Defaults to true (yes) if unspecified

val read : ('a, unit, string, string option) format4 -> 'a

Read some input from the user (returns a string option)

val print_table : ?cut:[ `Wrap of string | `Truncate | `None ] -> out_channel -> sep:string -> string list list -> unit

Prints a table; generally called on tables passed through align_table. The default cut is to wrap on stdout, stderr, keep as-is otherwise. `Wrap sep prepends sep on wrapped lines