2017-02-27 13:34:16 +00:00
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open Import
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open Sexp.Of_sexp
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module Mini_shexp = struct
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type 'a t =
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| Run of 'a * 'a list
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| Chdir of 'a * 'a t
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| Setenv of 'a * 'a * 'a t
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| With_stdout_to of 'a * 'a t
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let rec t a sexp =
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sum
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[ cstr_rest "run" (a @> nil) a (fun prog args -> Run (prog, args))
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; cstr "chdir" (a @> t a @> nil) (fun dn t -> Chdir (dn, t))
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; cstr "setenv" (a @> a @> t a @> nil) (fun k v t -> Setenv (k, v, t))
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; cstr "with-stdout-to" (a @> t a @> nil) (fun fn t -> With_stdout_to (fn, t))
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]
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sexp
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let rec map t ~f =
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match t with
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| Run (prog, args) -> Run (f prog, List.map args ~f)
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| Chdir (fn, t) -> Chdir (f fn, map t ~f)
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| Setenv (var, value, t) -> Setenv (f var, f value, map t ~f)
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| With_stdout_to (fn, t) -> With_stdout_to (f fn, map t ~f)
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let rec fold t ~init:acc ~f =
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match t with
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| Run (prog, args) -> List.fold_left args ~init:(f acc prog) ~f
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| Chdir (fn, t) -> fold t ~init:(f acc fn) ~f
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| Setenv (var, value, t) -> fold t ~init:(f (f acc var) value) ~f
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| With_stdout_to (fn, t) -> fold t ~init:(f acc fn) ~f
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let to_action ~dir ~env (t : string t) =
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let rec loop vars dir stdouts = function
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| Chdir (fn, t) ->
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loop vars (Path.relative dir fn) stdouts t
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| Setenv (var, value, t) ->
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loop (String_map.add vars ~key:var ~data:value) dir stdouts t
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| With_stdout_to (fn, t) ->
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loop vars dir (Path.relative dir fn :: stdouts) t
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| Run (prog, args) ->
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let stdout_to, touches =
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match stdouts with
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| [] -> None, []
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| p :: rest -> (Some p, rest)
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in
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{ Action.
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prog = Path.relative dir prog
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; args = args
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; dir
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; env = Context.extend_env ~vars ~env
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; stdout_to
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; touches
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}
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in
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loop String_map.empty dir [] t
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let rec sexp_of_t f : _ -> Sexp.t = function
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| Run (a, xs) -> List (Atom "run" :: f a :: List.map xs ~f)
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| Chdir (a, r) -> List [Atom "chdir" ; f a ; sexp_of_t f r]
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| Setenv (k, v, r) -> List [Atom "setenv" ; f k ; f v ; sexp_of_t f r]
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| With_stdout_to (fn, r) -> List [Atom "with-stdout-to"; f fn; sexp_of_t f r]
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end
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module T = struct
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type 'a t =
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| Bash of 'a
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| Shexp of 'a Mini_shexp.t
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let t a sexp =
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match sexp with
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| Atom _ -> Bash (a sexp)
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| List _ -> Shexp (Mini_shexp.t a sexp)
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let map t ~f =
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match t with
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| Bash x -> Bash (f x)
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| Shexp x -> Shexp (Mini_shexp.map x ~f)
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let fold t ~init ~f =
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match t with
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| Bash x -> f init x
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| Shexp x -> Mini_shexp.fold x ~init ~f
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let sexp_of_t f : _ -> Sexp.t = function
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| Bash a -> List [Atom "bash" ; f a]
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| Shexp a -> List [Atom "shexp" ; Mini_shexp.sexp_of_t f a]
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end
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include T
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module Unexpanded = String_with_vars.Lift(T)
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let to_action ~dir ~env = function
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| Shexp shexp -> Mini_shexp.to_action ~dir ~env shexp
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| Bash cmd ->
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{ Action.
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prog = Path.absolute "/bin/bash"
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; args = ["-e"; "-u"; "-o"; "pipefail"; "-c"; cmd]
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; env
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; dir
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; stdout_to = None
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; touches = []
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}
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