Add rundeps feature to bild

This allows me to specify runtime dependencies, not just system or
language deps.

2 files changed, 21 insertions, 5 deletions

diff --git a/Biz/Bild/Builder.nix b/Biz/Bild/Builder.nix
index 2ed3dd1..959d176 100644
--- a/Biz/Bild/Builder.nix
+++ b/Biz/Bild/Builder.nix
@@ -51,6 +51,12 @@ let
       else
         lib.attrsets.attrVals target.sysdeps pkgs;
 
+    rundeps_ =
+      if isEmpty target.rundeps then
+        []
+      else
+        lib.attrsets.attrVals target.rundeps bild.pkgs;
+
     CODEROOT = ".";
 
     builders = {
@@ -73,7 +79,7 @@ let
         installPhase = ''
           install -D ${name} $out/bin/${name}
           wrapProgram $out/bin/${name} \
-            --prefix PATH : ${lib.makeBinPath sysdeps_}
+            --prefix PATH : ${lib.makeBinPath rundeps_}
         '';
       };
 
diff --git a/Biz/Bild/Meta.hs b/Biz/Bild/Meta.hs
index 5549cb3..ad5fdd6 100644
--- a/Biz/Bild/Meta.hs
+++ b/Biz/Bild/Meta.hs
@@ -14,14 +14,17 @@ import qualified Text.Regex.Applicative as Regex
 
 -- | A third-party dependency. This gets mapped to some name in nixpkgs,
 -- prefixed by package set like @haskellPackages@ or
--- @python3Packages@. Currently this prefix is implicit, but it should be added
--- here as part of a tuple or something.
+-- @python3Packages@.
 type Dep = String
 
 -- | This is a system-level requirement, the string gets mapped to a name in
--- nixpkgs at the top level, like @pkgs.thing@. If I add the package set prefix to 'Dep', then this can just become literally @(Sys, "thing")@.
+-- nixpkgs at the top level, like @pkgs.thing@.
 type Sys = String
 
+-- | A run-time dependency. This is some executable that will be placed on
+-- @PATH@. This gets selected from @bild.pkgs@, so it must be exported there.
+type Run = String
+
 -- | An arbitrary compiler argument that may get added to the compilation
 -- command. Should be used sparingly, and not all builds will support this.
 type Arg = String
@@ -40,7 +43,8 @@ data Parsed = Parsed
   { pdep :: Set Dep,
     parg :: Set Arg,
     pout :: Out,
-    psys :: Set Sys
+    psys :: Set Sys,
+    prun :: Set Run
   }
 
 detect :: Ord a => Regex.RE Char a -> [Text] -> Set a
@@ -69,6 +73,7 @@ detectAll m cl = Parsed {..}
     pdep = detect_ dep
     psys = detect_ sys
     parg = detect_ arg
+    prun = detect_ run
 
 dep :: [Char] -> Regex.RE Char Dep
 dep comment =
@@ -96,3 +101,8 @@ arg :: [Char] -> Regex.RE Char Arg
 arg comment =
   Regex.string (comment ++ " : arg ")
     *> Regex.many Regex.anySym
+
+run :: [Char] -> Regex.RE Char Run
+run comment =
+  Regex.string (comment ++ " : run ")
+    *> Regex.many Regex.anySym