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(* Copyright (C) 2017 Ryan Kavanagh <rkavanagh@cs.cmu.edu> *)
(* Distributed under the ISC license, see COPYING for details. *)
signature HELPER =
sig
datatype checks = Check of string * (unit -> unit)
| Problem of string * (unit -> real)
(* Path to the directory under which we can find a student's *)
(* submitted files. *)
val handinPath : string
(* Takes in the name of a file submitted by a student *)
(* and joins it with handinPath. *)
val joinHandinPath : string -> string
(* Removes handinPath from a path if it prefixes it. *)
val stripHandinPath : string -> string
(* Takes in a list of filenames, and checks if those files *)
(* exist in the handinPath directory. *)
(* Aborts catastrophically if a file is missing. *)
val checkFilesExist : string list -> unit
(* Uses ghostscript to check if the student submitted a valid *)
(* PDF (or an empty file in its place). Aborts catastrophically *)
(* if missing. *)
val checkPDF : string -> unit
(* Runs a series of checks and then outputs a list of *)
(* (problem name, score) tuples *)
val runChecks : checks list -> (string * real) list
(* Produces an AutoLab JSON score string from a scores list *)
(* and optional scoreboard *)
val scoresToString : (string * real) list * int list option -> string
(* Puts a list of strings in a box for printing. *)
val stringsInBox : string list -> string list
(* Prints a list of strings in a box. *)
val printInBox : string list -> unit
(* Prints a string followed by newline. *)
val printLn : string -> unit
(* printLns a list of strings, then the empty score, *)
(* then exits. Useful when you need to abort early. *)
val abortWithMessage : string list -> 'a
(* Prints a command and then runs it, returning the exit status *)
val runCmd : string -> OS.Process.status
(* Runs a command (with argument list) using Posix.Process.execp. *)
(* Return the program's output as a string, along with its exit status. *)
val execpOutput : string * string list -> string * Posix.Process.exit_status
(* Takes a regex in awk format, and a string, and checks if *)
(* the regex matches the string *)
val matchesAwkRegex : string * string -> bool
end
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