Merge pull request #27971 from Profpatsch/fish-config-fix

Fish config fix

pkgs/shells/fish/default.nix

@@ -1,7 +1,7 @@
 { stdenv, fetchurl, coreutils, utillinux,
   nettools, kbd, bc, which, gnused, gnugrep,
   groff, man-db, glibc, libiconv, pcre2,
-  gettext, ncurses, python
+  gettext, ncurses, python3
 
   , writeText
 
@@ -85,9 +85,8 @@ let
         $__extra_confdir
     end
   '';
-in
 
-stdenv.mkDerivation rec {
+  fish = stdenv.mkDerivation rec {
     name = "fish-${version}";
     version = "2.6.0";
 
@@ -105,7 +104,7 @@ stdenv.mkDerivation rec {
     # Python: Autocompletion generated from manpages and config editing
     propagatedBuildInputs = [
       coreutils gnugrep gnused bc
-    python groff gettext
+      python3 groff gettext
     ] ++ optional (!stdenv.isDarwin) man-db;
 
     postInstall = ''
@@ -132,8 +131,10 @@ stdenv.mkDerivation rec {
             "$out/share/fish/functions/__fish_print_help.fish"
       sed -i "s|/sbin /usr/sbin||" \
             "$out/share/fish/functions/__fish_complete_subcommand_root.fish"
-    sed -e "s|clear;|${ncurses.out}/bin/clear;|" \
+      sed -e "s|clear;|${getBin ncurses}/bin/clear;|" \
-        -i "$out/share/fish/functions/fish_default_key_bindings.fish" \
+          -i "$out/share/fish/functions/fish_default_key_bindings.fish"
+      sed -e "s|python3|${getBin python3}/bin/python3|" \
+          -i $out/share/fish/functions/{__fish_config_interactive.fish,fish_config.fish,fish_update_completions.fish}
 
     '' + optionalString stdenv.isLinux ''
       sed -e "s| ul| ${utillinux}/bin/ul|" \
@@ -167,4 +168,35 @@ stdenv.mkDerivation rec {
     passthru = {
       shellPath = "/bin/fish";
     };
-}
+  };
+
+  tests = {
+
+    # Test the fish_config tool by checking the generated splash page.
+    # Since the webserver requires a port to run, it is not started.
+    fishConfig =
+      let fishScript = writeText "test.fish" ''
+        set -x __fish_bin_dir ${fish}/bin
+        echo $__fish_bin_dir
+        cp -r ${fish}/share/fish/tools/web_config/* .
+        chmod -R +w *
+        # we delete everything after the fileurl is assigned
+        sed -e '/fileurl =/q' -i webconfig.py
+        echo "print(fileurl)" >> webconfig.py
+        # and check whether the message appears on the page
+        cat (${python3}/bin/python ./webconfig.py \
+          | tail -n1 | sed -ne 's|.*\(/tmp/.*\)|\1|p' \
+        ) | grep 'a href="http://localhost.*Start the Fish Web config'
+
+        # cannot test the http server because it needs a localhost port
+      '';
+      in ''
+        HOME=$(mktemp -d)
+        ${fish}/bin/fish ${fishScript}
+      '';
+  };
+
+  # FIXME(Profpatsch) replace withTests stub
+  withTests = flip const;
+
+in withTests tests fish