Module type `Signatures.COMMAND`

Provides an abstract type for easily building complex shell commands without making quotation mistakes.

type tags

type pathname

type t =

| Seq of t list
(*
A sequence of commands (like the `;' in shell)
*)
| Cmd of spec
(*
A command is made of command specifications (spec)
*)
| Echo of string list * pathname
(*
Write the given strings as is (newlines are not added) to the given file
*)
| Nop
(*
The command that does nothing
*)

The type t provides some basic combinators and command primitives. Other commands can be made of command specifications (spec).

and spec =

| N
(*
No operation.
*)
| S of spec list
(*
A sequence. This gets flattened in the last stages
*)
| A of string
(*
An atom.
*)
| P of pathname
(*
A pathname.
*)
| Px of pathname
(*
A pathname, that will also be given to the call_with_target hook.
*)
| Sh of string
(*
A bit of raw shell code, that will not be escaped.
*)
| T of tags
(*
A set of tags, that describe properties and some semantics information about the command, afterward these tags will be replaced by command specs (flags for instance).
*)
| V of string
(*
A virtual command, that will be resolved at execution using resolve_virtuals
*)
| Quote of spec
(*
Used for commands or part of commands, meant to be passed to Sys.command at some point.
*)

The type for command specifications. That is pieces of command.

val atomize : string list -> spec

Will convert a string list to a list of atoms by adding A constructors.

val atomize_paths : string list -> spec

Will convert a string list to a list of paths by adding P constructors.

val execute : ?quiet:bool -> ?pretend:bool -> t -> unit

Run the command.

val execute_many : 
  ?quiet:bool ->
  ?pretend:bool ->
  t list ->
  (bool list * exn) option

Run the commands in the given list, if possible in parallel. See the module Ocamlbuild_executor.

val setup_virtual_command_solver : string -> (unit -> spec) -> unit

setup_virtual_command_solver virtual_command solver the given solver can raise Not_found if it fails to find a valid command for this virtual command.

val search_in_path : string -> string

Search the given command in the command path and return its absolute pathname.

val reduce : spec -> spec

Simplify a command by flattening the sequences and resolving the tags into command-line options.

val print : Format.formatter -> t -> unit

Print a command (the format is not suitable to running the command).

val to_string : t -> string

Convert a command to a string (same format as print).

val string_of_command_spec : spec -> string

Build a string representation of a command that can be passed to the system calls.

package ocamlbuild

Module type Signatures.COMMAND

Module type `Signatures.COMMAND`