create and document build.nix

just/Makefile

@@ -0,0 +1,24 @@
+FENNEL?=$(fennel)
+PREFIX?=/usr/local
+
+PROGRAM_NAME=just
+MAIN=$(PROGRAM_NAME).fnl
+SOURCES=$(MAIN) listeners.fnl viewplex.fnl webview.fnl
+
+$(PROGRAM_NAME): $(SOURCES) Makefile
+	(echo -e "#!/usr/bin/env lua\n" ; \
+	: we reset package.path so that --require-as-include cannot find ; \
+	: and inline third-party modules ; \
+	lua -e 'package.path="./?.lua"' $(FENNEL) --require-as-include --compile $(MAIN) ) > $@
+	chmod +x $@
+
+install:
+	mkdir -p $(PREFIX)/bin $(PREFIX)/lib/$(PROGRAM_NAME)
+	cp $(PROGRAM_NAME) $(PREFIX)/bin
+#	cp interface.xml styles.css $(PREFIX)/lib/$(PROGRAM_NAME)
+
+test:
+	for i in *-test.fnl ; do lua $(fennel) $$i; done
+
+easylist.txt:
+	curl https://easylist.to/easylist/easylist.txt -O

just/README.md

@@ -2,6 +2,22 @@
 
 Touchscreen-friendly wrapper around Webkit
 
+## Building
+
+If you have Nix
+
+    nix-build build.nix
+
+Otherwise, very approximately
+
+* find and install the Lua packages described by the lua5_3.withPackages form in `default.nix`
+* install [Fennel](https://fennel-lang.org/setup#downloading-fennel)
+* `make`
+
+This *should* result in an executable called `just`, but
+YMMV. Consider Nix?
+
+
 ## TO DO
 
 * functional

just/build.nix

@@ -0,0 +1,2 @@
+with import <nixpkgs> {} ;
+callPackage ./. {}

just/default.nix

@@ -41,5 +41,7 @@ in stdenv.mkDerivation {
   nativeBuildInputs = [ lua makeWrapper ];
 
   makeFlags = [ "PREFIX=${placeholder "out"}" ];
-
+  postInstall = ''
+    wrapProgram $out/bin/just  --set GI_TYPELIB_PATH "$GI_TYPELIB_PATH"
+  '';
 }

just/just.fnl

@@ -3,7 +3,8 @@
 
 (local { : Gtk : Gdk : WebKit2 : cairo } lgi)
 
-(local {: view} (require :fennel))
+(if (os.getenv "JUST_HACKING")
+    (local {: view} (require :fennel)))
 
 (local Listeners (require :listeners))
 (local Webview (require :webview))