cano: 0.1.0-alpha -> 0.2.0-alpha, modernize

pkgs/by-name/ca/cano/allow-read-only-store-help-page.patch

@@ -0,0 +1,42 @@
+diff --git a/src/main.c b/src/main.c
+index 993a76f..de5b2c5 100644
+--- a/src/main.c
++++ b/src/main.c
+@@ -6,12 +6,8 @@ _Static_assert(sizeof(string_modes)/sizeof(*string_modes) == MODE_COUNT, "Number
+ char *get_help_page(char *page) {
+     if (page == NULL) return NULL;
+ 
+-    char *env = getenv("HOME");
+-    if(env == NULL) CRASH("could not get HOME");
+-
+-    char *help_page = calloc(128, sizeof(char));
+-    if (help_page == NULL) CRASH("could not calloc memory for help page");
+-    snprintf(help_page, 128, "%s/.local/share/cano/help/%s", env, page);
++    char *help_page;
++    asprintf(&help_page, "@help@/%s", page);
+ 
+     // check if file exists
+     struct stat st;
+diff --git a/src/tools.c b/src/tools.c
+index 220d7a1..4ce211e 100644
+--- a/src/tools.c
++++ b/src/tools.c
+@@ -63,6 +63,9 @@ void free_undo_stack(Undo_Stack *undo) {
+ 
+ void handle_save(Buffer *buffer) {
+     FILE *file = fopen(buffer->filename, "w");
++
++    if (file == NULL)
++        return;
+     fwrite(buffer->data.data, buffer->data.count, sizeof(char), file);
+     fclose(file);
+ }
+@@ -72,7 +75,7 @@ Buffer *load_buffer_from_file(char *filename) {
+     size_t filename_s = strlen(filename)+1;
+     buffer->filename = calloc(filename_s, sizeof(char));
+     strncpy(buffer->filename, filename, filename_s);
+-    FILE *file = fopen(filename, "a+");
++    FILE *file = fopen(filename, "r");
+     if(file == NULL) CRASH("Could not open file");
+     fseek(file, 0, SEEK_END);
+     size_t length = ftell(file);

pkgs/by-name/ca/cano/package.nix

@@ -1,34 +1,55 @@
-{ stdenv
-, lib
-, fetchFromGitHub
-, gnumake
-, ncurses
+{
+  stdenv,
+  lib,
+  fetchFromGitHub,
+  installShellFiles,
+  ncurses,
 }:
 stdenv.mkDerivation (finalAttrs: {
   pname = "cano";
-  version = "0.1.0-alpha";
+  version = "0.2.0-alpha";
 
   src = fetchFromGitHub {
     owner = "CobbCoding1";
     repo = "Cano";
     rev = "v${finalAttrs.version}";
-    hash = "sha256-BKbBDN7xZwlNzw7UFgX+PD9UXbr9FtELo+PlbfSHyRY=";
+    hash = "sha256-OaWj0AKw3+sEhcAbIjgOLfxwCKRG6O1k+zSp0GnnFn8=";
   };
 
-  buildInputs = [ gnumake ncurses ];
-  hardeningDisable = [ "format" "fortify" ];
+  patches = [ ./allow-read-only-store-help-page.patch ];
+
+  postPatch = ''
+    substituteInPlace src/main.c \
+      --replace-fail "@help@" "${placeholder "out"}/share/help"
+  '';
+
+  nativeBuildInputs = [ installShellFiles ];
+
+  buildInputs = [ ncurses ];
+
+  hardeningDisable = [
+    "format"
+    "fortify"
+  ];
 
   installPhase = ''
-    mkdir -p $out/bin
-    cp build/cano $out/bin
+    runHook preInstall
+
+    install -Dm755 build/cano -t $out/bin
+
+    mkdir -p $out/share
+    cp -r docs/help $out/share
+    installManPage docs/cano.1
+
+    runHook postInstall
   '';
 
   meta = {
-     description = "Text Editor Written In C Using ncurses";
-     homepage = "https://github.com/CobbCoding1/Cano";
-     license = lib.licenses.asl20;
-     mainProgram = "Cano";
-     maintainers = with lib.maintainers; [ sigmanificient ];
-     platforms = lib.platforms.linux;
+    description = "Text Editor Written In C Using ncurses";
+    homepage = "https://github.com/CobbCoding1/Cano";
+    license = lib.licenses.asl20;
+    mainProgram = "Cano";
+    maintainers = with lib.maintainers; [ sigmanificient ];
+    platforms = lib.platforms.linux;
   };
 })