Command lines.
Command line values specify the command line arguments given to tools spawns. In certain contexts the command line value is the full specification of the tool spawn, in this case the first element of the line defines the program to invoke. In other contexts the tool to invoke and its arguments are kept separate.
examples.
B00 artefact. This module allows to unstamp command arguments. Unstamped arguments have no special semantics as far as the command line is concerned they simply indicate that the argument value itself does not influence the outputs of the tool. Unstamped arguments do not appear in the command line stamp which is used to memoize tool spawns. A typical example of unstamped arguments are file paths to inputs: it's often the file contents not the actual file path that determines the tool output; beware though that some tool use both the file path contents and the actual file path in their outputs.
val is_empty : t -> boolis_empty l is true iff l is an empty list of arguments.
val empty : tempty is an empty list of arguments.
val arg : string -> targ a is the argument a.
unstamp l indicates that arguments l do not influence the tool's invocation outputs. These arguments are omitted from the command line's stamp.
val args : ?slip:string -> string list -> targs ?slip l is a command line from the list of arguments l. If slip is specified it is added on the command line before each element of l.
val of_list : ?slip:string -> ('a -> string) -> 'a list -> tof_list ?slip conv l is args ?slip (List.map conv l).
val of_rev_list : ?slip:string -> ('a -> string) -> 'a list -> tof_rev_list ?slip conv l is args ?slip (List.rev_map conv l).
rev_paths ?slip ps is of_rev_list ?slip Fpath.to_string ps.
type tool = Fpath.tThe type for command line tools. A command line tool is represented by a file path according to the POSIX convention for exec(3). If it is made of a single segment, for example Fpath.v "ocaml", it represents a program name to be looked up via a search procedure; for example in the PATH environment variable. If it is a file path with multiple segments (POSIX would say if they contain a slash characters) the program is the file itself.
set_tool tool l replaces l's first element with tool. This is None if l is empty.
get_tool is like tool but raises Invalid_argument in case of error.
val is_singleton : t -> boolis_singleton l is true iff l has a single argument.
val fold :
arg:(string -> 'a) ->
unstamp:('a -> 'a) ->
append:('a -> 'a -> 'a) ->
empty:'a ->
t ->
'afold ~arg ~unstamp ~append ~empty l folds over l's structure.
val iter_enc :
arg:('a -> string -> unit) ->
unstamp:('a -> unit) ->
append:('a -> unit) ->
empty:('a -> unit) ->
'a ->
t ->
unitval to_list : t -> string listto_list l converts l to a list of strings.
val to_stamp : t -> string listto_stamp l is the sequence of stamped arguments.
val to_list_and_stamp : t -> string list * string listto_list_and_stamp l is a l as a list of strings tuppled with its stamp: the sequence of stamped arguments.
val to_string : t -> stringto_string l converts l to a string that can be passed to the command(3) POSIX system call.
of_string s tokenizes s into a command line. The tokens are recognized according to the token production of the following grammar which should be mostly be compatible with POSIX shell tokenization.
white ::= ' ' | '\t' | '\n' | '\x0B' | '\x0C' | '\r' squot ::= '\'' dquot ::= '\"' bslash ::= '\\' tokens ::= white+ tokens | token tokens | ϵ token ::= ([^squot dquot white] | squoted | dquoted) token | ϵ squoted ::= squot [^squot]* squot dquoted ::= dquot (qchar | [^dquot])* dquot qchar ::= bslash (bslash | dquot | '$' | '`' | '\n')
qchar are substitued by the byte they escape except for '\n' which removes the backslash and newline from the byte stream. squoted and dquoted represent the bytes they enclose.
let ls p = Cmd.(arg "ls" % "-a" % path p)
let tar archive dir =
Cmd.(arg "tar" % "-cvf" %% unstamp (path archive) %% path dir)
let opam cmd = Cmd.(arg "opam" % cmd)
let opam_install pkgs = Cmd.(opam "install" %% args pkgs)
let ocamlc ?(debug = false) file =
Cmd.(arg "ocamlc" % "-c" % if' debug (arg "-g") %% path file)
let ocamlopt ?(profile = false) ?(debug = false) incs file =
let profile = Cmd.(if' profile (arg "-p")) in
let debug = Cmd.(if' debug (arg "-g")) in
let incs = Cmd.(unstamp (paths ~slip:"-I" incs)) in
Cmd.(arg "ocamlopt" % "-c" %% debug %% profile %% incs %% unstamp (path file))