Nix-writers: Difference between revisions

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VisualWikitext

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 Nix-writers are a way to write other programming languages inline in nix-code.
-Basically it's like writeScript/writeScriptBin but for other Languages.
+They are like writeScript/writeScriptBin but for other languages.
 Every writer has a ...Bin variant which can be used inside environment.systemPackages.
 Most of the writers take an attrributeset where one can add libraries.
+These are declared in [https://github.com/NixOS/nixpkgs/blob/master/pkgs/build-support/writers/scripts.nix <code>/pkgs/build-support/writers/scripts.nix</code>].
 == Languages ==
@@ Line 14: / Line 16: @@
 pkgs.writers.writeBash "hello_world" ''
    echo 'hello world!'
-''
-</syntaxHighlight>
-===C===
-<syntaxHighlight lang=nix>
-pkgs.writers.writeC "hello-world-ncurses" {
-  libraries = [ pkgs.ncurses ];
-} ''
-  #include <ncurses.h>
-  int main() {
-    initscr();
-    printw("Hello World !!!");
-    refresh(); endwin();
-    return 0;
-  }
 ''
 </syntaxHighlight>
@@ Line 82: / Line 68: @@
 <syntaxHighlight lang=nix>
 writePython2 "test_python2" {
-   libraries = [ pkgs.python2Packages.enum ];
+   deps = [ pkgs.python2Packages.enum ];
 } ''
    from enum import Enum
@@ Line 107: / Line 93: @@
 ''
 </syntaxHighlight>
+To disable errors use 'flakeIgnore' like this:
+<syntaxHighlight lang=nix>
+writePython3 "test_python3" {
+  libraries = [ pkgs.python3Packages.pyyaml ];
+  flakeIgnore = [ "E265" "E225" ];
+} ''
+  import yaml
+  y = yaml.load("""
+    - test: success
+  """)
+  print(y[0]['test'])
+''
+</syntaxHighlight>
+[[Category:Nix Language]]