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open Ast
let register env =
(*
--# Get current working directory
--#
--# Returns the absolute path of the current working directory.
--#
--# @name getwd
--# @return :: String The current working directory.
--# @example
--# getwd()
--# @family core
--# @export
*)
let env = Env.add "getwd"
(make_builtin_named ~name:"getwd" 0 (fun _args _env ->
try VString (Sys.getcwd ())
with Sys_error msg ->
Error.runtime_error (Printf.sprintf "getwd: %s" msg)
))
env
in
(*
--# Check if file exists
--#
--# Checks if a regular file exists at the given path.
--# Returns false if the path is a directory or does not exist.
--#
--# @name file_exists
--# @param path :: String The path to check.
--# @return :: Bool True if it's a regular file.
--# @example
--# file_exists("data.csv")
--# @family core
--# @export
*)
let env = Env.add "file_exists"
(make_builtin_named ~name:"file_exists" 1 (fun args _env ->
match args with
| [(_, VString path)] | [(_, VSymbol path)] ->
let exists =
match Unix.stat path with
| exception Unix.Unix_error _ -> false
| { Unix.st_kind = Unix.S_REG; _ } -> true
| _ -> false
in
VBool exists
| [(_, other)] ->
Error.type_error (Printf.sprintf "Function `file_exists` expects a String, got %s." (Utils.type_name other))
| _ -> Error.arity_error_named "file_exists" 1 (List.length args)
))
env
in
(*
--# Check if directory exists
--#
--# Checks if a directory exists at the given path.
--#
--# @name dir_exists
--# @param path :: String The path to check.
--# @return :: Bool True if it's a directory.
--# @example
--# dir_exists("tests")
--# @family core
--# @export
*)
let env = Env.add "dir_exists"
(make_builtin_named ~name:"dir_exists" 1 (fun args _env ->
match args with
| [(_, VString path)] | [(_, VSymbol path)] ->
let exists =
match Unix.stat path with
| exception Unix.Unix_error _ -> false
| { Unix.st_kind = Unix.S_DIR; _ } -> true
| _ -> false
in
VBool exists
| [(_, other)] ->
Error.type_error (Printf.sprintf "Function `dir_exists` expects a String, got %s." (Utils.type_name other))
| _ -> Error.arity_error_named "dir_exists" 1 (List.length args)
))
env
in
(*
--# Read file contents
--#
--# Reads the entire content of a file into a string.
--#
--# @name read_file
--# @param path :: String The path to the file.
--# @return :: String The file content.
--# @example
--# read_file("config.json")
--# @family core
--# @export
*)
let env = Env.add "read_file"
(make_builtin_named ~name:"read_file" 1 (fun args _env ->
match args with
| [(_, VString path)] | [(_, VSymbol path)] ->
(try
let ic = open_in path in
Fun.protect ~finally:(fun () -> close_in_noerr ic) (fun () ->
let n = in_channel_length ic in
let buf = Bytes.create n in
really_input ic buf 0 n;
VString (Bytes.to_string buf)
)
with
| Sys_error msg ->
Error.make_error FileError (Printf.sprintf "read_file: %s" msg)
| exn ->
Error.make_error FileError (Printf.sprintf "read_file: %s" (Printexc.to_string exn)))
| [(_, other)] ->
Error.type_error (Printf.sprintf "Function `read_file` expects a String, got %s." (Utils.type_name other))
| _ -> Error.arity_error_named "read_file" 1 (List.length args)
))
env
in
(*
--# List files in directory
--#
--# Returns a list of files and directories in the specified path.
--# Supports an optional regex pattern for filtering.
--#
--# @name list_files
--# @param path :: String [Optional] The directory to list. Defaults to ".".
--# @param pattern :: String [Optional] Regex pattern to filter results.
--# @return :: List[String] List of filenames.
--# @example
--# list_files(".", pattern = "\\.t$")
--# @family core
--# @export
*)
let env = Env.add "list_files"
(make_builtin_named ~name:"list_files" ~variadic:true 0 (fun args _env ->
let positional = List.filter (fun (name, _) -> name = None) args in
let n_positional = List.length positional in
if n_positional > 1 then
Error.arity_error_named "list_files" 1 n_positional
else
let path_result = match positional with
| [(_, VString s)] | [(_, VSymbol s)] -> Ok s
| [(_, other)] ->
Error (Printf.sprintf "Function `list_files` expects a String path, got %s." (Utils.type_name other))
| _ -> Ok "."
in
match path_result with
| Error msg -> Error.type_error msg
| Ok path ->
let pattern_result = match List.assoc_opt (Some "pattern") args with
| Some (VString s) | Some (VSymbol s) ->
(match Str.regexp s with
| exception Failure msg ->
Error (Printf.sprintf "Invalid pattern for `list_files`: %s" msg)
| re -> Ok (Some re))
| None -> Ok None
| Some other ->
Error (Printf.sprintf "Argument `pattern` of `list_files` must be a String, got %s." (Utils.type_name other))
in
(match pattern_result with
| Error msg -> Error.type_error msg
| Ok compiled_pattern ->
(try
let entries = Sys.readdir path in
let filenames = Array.to_list entries in
let filtered = match compiled_pattern with
| None -> filenames
| Some re ->
List.filter (fun name ->
match Str.search_forward re name 0 with
| exception Not_found -> false
| _ -> true
) filenames
in
let sorted = List.sort String.compare filtered in
VList (List.map (fun name -> (None, VString name)) sorted)
with Sys_error msg ->
Error.make_error FileError (Printf.sprintf "list_files: %s" msg)))
))
env
in
(*
--# Get environment variable
--#
--# Retrieves the value of an environment variable.
--#
--# @name env
--# @param name :: String The name of the environment variable.
--# @return :: String | NA The value of the variable, or null if not set.
--# @example
--# env("HOME")
--# @family core
--# @export
*)
let env = Env.add "env"
(make_builtin_named ~name:"env" 1 (fun args _env ->
match args with
| [(_, VString name)] | [(_, VSymbol name)] ->
(match Sys.getenv_opt name with
| Some value -> VString value
| None -> (VNA NAGeneric))
| [(_, other)] ->
Error.type_error (Printf.sprintf "Function `env` expects a String, got %s." (Utils.type_name other))
| _ -> Error.arity_error_named "env" 1 (List.length args)
))
env
in
env