Rewrite main.scm so it does not read the whole wordlist at once

.envrc

@@ -1 +1,4 @@
 use flake
+
+export CHICKEN_REPOSITORY_PATH="$(pwd)/.eggs"
+export CHICKEN_INSTALL_REPOSITORY="$(pwd)/.eggs"

flake.nix

@@ -30,28 +30,32 @@
     };
   in {
     devShells.default = pkgs.mkShell rec {
-      buildInputs = [
-        lua
-        # fennel
-        pkgs.chicken
-        # pkgs.guile_3_0
-        # pkgs.gcc
-        # pkgs.gambit
+      buildInputs = with pkgs; [
+        chicken
+        openssl
+        gcc
       ];
       LD_LIBRARY_PATH = "${lib.makeLibraryPath buildInputs}";
     };
-    packages.default = pkgs.mkDerivation rec {
-      buildInputs = [
-        pkgs.chicken
-        # pkgs.guile_3_0
-        pkgs.gcc
-        pkgs.gambit
+    packages.default = pkgs.stdenv.mkDerivation rec {
+      name = "seizethemeans";
+      src = ./.;
+
+      buildInputs = with pkgs; [
+        chicken
+        openssl
+        gcc
       ];
 
       buildPhase = ''
         chicken ./main.scm -explicit-use
         gcc 
       '';
+
+      installPhase = ''
+        mkdir -p $out/bin
+        cp main $out/bin/seize-the-means
+      '';
       
       LD_LIBRARY_PATH = "${lib.makeLibraryPath buildInputs}";
     };

main.scm

@@ -1,34 +1,40 @@
-(import (chicken io)
+(import (chicken condition)
+        (chicken io)
         (chicken process-context)
         (chicken random)
         (chicken format))
 
 (define *api-url* (get-environment-variable "MASTODON_API_URL"))
 (define *access-token* (get-environment-variable "MASTODON_ACCESS_TOKEN"))
+(define file "./words.txt")
 
-(define (file-lines file-path)
+(define (file-num-lines file-path)
   (let ((file (open-input-file file-path)))
-    (let loop ((lines '())
-               (cur (read-line file)))
-      (if (eof-object? cur)
+    (let loop ((num-lines 0))
+      (if (eof-object? (read-line file))
         (begin (close-input-port file)
-               (reverse lines))
-        (loop (cons cur lines)
-              (read-line file))))))
+               num-lines)
+        (loop (+ 1 num-lines))))))
 
-(define lines (file-lines "./words.txt"))
+(define (file-line-at file-path n)
+  (let ((file (open-input-file file-path)))
+    (let loop ((m 0)
+               (cur (read-line file)))
+      (cond
+        ((= m n)
+         (begin
+           (close-input-port file)
+           cur))
 
-(define (list-nth ls n)
-  (if (zero? n)
-    (car ls)
-    (list-nth (cdr ls) (- n 1))))
+        ((eof-object? cur)
+         (begin
+           (close-input-port file)
+           (signal (format "~s is greater than the number of lines in ~s" n file-path))))
+        
+        (else (loop (+ 1 m) (read-line file)))))))
 
-(define (list-remove-nth ls n)
-  (if (zero? n)
-    (cdr ls)
-    (cons (car ls) (list-remove-nth (cdr ls) (- n 1)))))
-
-(let ((nth (pseudo-random-integer (length lines))))
+(let* ((n (pseudo-random-integer (file-num-lines file)))
+       (line (file-line-at file n)))
   (display "Seize the means of ")
-  (display (list-nth lines nth))
+  (display line)
   (display "\n"))