3 files changed, 25 insertions, 17 deletions
diff --git a/Biz/Bild/Rules.nix b/Biz/Bild/Rules.nix
index a8695eb..f5f016f 100644
--- a/Biz/Bild/Rules.nix
+++ b/Biz/Bild/Rules.nix
@@ -3,6 +3,9 @@
 with nixpkgs;
 
 let
+  ghcCompiler = "ghc865";
+  ghcjsCompiler = "ghcjs86";
+
   # provided by .envrc
   root = builtins.getEnv "BIZ_ROOT";
 
@@ -50,8 +53,8 @@ let
       ${toString (lib.lists.subtractLists haskellDeps deps)}
     ''));
 
-  ghc_ = mkGhc pkgs.haskell.packages.ghc865.ghcWithHoogle;
-  ghcjs_ = mkGhc pkgs.haskell.packages.ghcjs86.ghcWithPackages;
+  ghc_ = mkGhc pkgs.haskell.packages.${ghcCompiler}.ghcWithHoogle;
+  ghcjs_ = mkGhc pkgs.haskell.packages.${ghcjsCompiler}.ghcWithPackages;
 in {
   ghc = main:
     let
@@ -131,6 +134,7 @@ in {
 
       # tools
       nixpkgs.cmark
+      nixpkgs.haskell.packages.${ghcCompiler}.fast-tags
       nixpkgs.figlet
       nixpkgs.hlint
       nixpkgs.lolcat
@@ -140,6 +144,7 @@ in {
       nixpkgs.python37Packages.black
       nixpkgs.python37Packages.pylint
       nixpkgs.wemux
+      (pkgs.writeScriptBin "ftags" (builtins.readFile ../Ide/ftags.sh))
     ];
     shellHook = ". ${./ShellHook.sh}";
   };
diff --git a/Biz/Bild/ShellHook.sh b/Biz/Bild/ShellHook.sh
index 7b43d26..7724c28 100644
--- a/Biz/Bild/ShellHook.sh
+++ b/Biz/Bild/ShellHook.sh
@@ -124,18 +124,3 @@ function ci() {
 }
 
 help
-
-# ftags - search ctags
-ftags() {
-  local line
-  if [[ -e tags ]]
-  then
-  line=$(
-    awk 'BEGIN { FS="\t" } !/^!/ {print toupper($4)"\t"$1"\t"$2"\t"$3}' tags | \
-    cut -c1-80 | fzf --nth=1,2
-  )
-  ${EDITOR:-vim} \
-    $(cut -f3 <<< "$line") -c "set nocst" \
-    -c "silent tag $(cut -f2 <<< "$line")"
-  fi
-}
diff --git a/Biz/Ide/ftags.sh b/Biz/Ide/ftags.sh
new file mode 100755
index 0000000..daa4ca0
--- /dev/null
+++ b/Biz/Ide/ftags.sh
@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# ftags - search ctags
+set -euo pipefail
+tags=$BIZ_ROOT/tags
+if [[ ! -e $tags ]]
+then
+  fast-tags -R $BIZ_ROOT
+else
+  line=$(
+    awk 'BEGIN { FS="\t" } !/^!/ {print toupper($4)"\t"$1"\t"$2"\t"$3}' $tags \
+      | cut -c1-80 \
+      | fzf --nth=1,2
+  )
+  ${EDITOR:-vim} \
+    $(cut -f3 <<< "$line") \
+    -c "set nocst" \
+    -c "silent tag $(cut -f2 <<< "$line")"
+fi