fzf-git-sh: add support for fish (#439958)

pkgs/by-name/fz/fzf-git-sh/package.nix

@@ -14,6 +14,7 @@
   util-linux,
   xdg-utils,
   zsh,
+  fish,
   unstableGitUpdater,
 }:
 
@@ -29,6 +30,7 @@ stdenv.mkDerivation rec {
   };
 
   dontBuild = true;
+  doInstallCheck = true;
 
   postPatch = ''
     sed -i \
@@ -50,17 +52,30 @@ stdenv.mkDerivation rec {
       -e "s,__fzf_git=.*BASH_SOURCE.*,__fzf_git=$out/share/${pname}/fzf-git.sh," \
       -e "/__fzf_git=.*readlink.*/d" \
       fzf-git.sh
+
+    sed -i \
+      -e "s,\bbash\b,${bash}/bin/bash," \
+      -e "s,\''$fzf_git_sh_path\b,$out/share/${pname}," \
+      fzf-git.fish
   '';
 
   installPhase = ''
     install -D fzf-git.sh $out/share/${pname}/fzf-git.sh
+    install -D fzf-git.fish $out/share/${pname}/fzf-git.fish
+  '';
+
+  # Smoke test
+  installCheckPhase = ''
+    export HOME=$(mktemp -d)
+    ${bash}/bin/bash -c "source $out/share/${pname}/fzf-git.sh"
+    ${fish}/bin/fish -c "source $out/share/${pname}/fzf-git.fish"
   '';
 
   passthru.updateScript = unstableGitUpdater { };
 
   meta = with lib; {
     homepage = "https://github.com/junegunn/fzf-git.sh";
-    description = "Bash and zsh key bindings for Git objects, powered by fzf";
+    description = "Bash, zsh and fish key bindings for Git objects, powered by fzf";
     license = licenses.mit;
     maintainers = with maintainers; [ deejayem ];
     platforms = platforms.all;