From 9f8f73f53063db9a1d9a615b4d261282858e5c93 Mon Sep 17 00:00:00 2001
From: edmccard <edmccard@hotmail.com>
Date: Tue, 24 Apr 2012 10:11:16 -0400
Subject: [PATCH] New build.d

---
 README.md    |  6 +++++
 src/Makefile |  2 +-
 src/build.d  | 66 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 73 insertions(+), 1 deletion(-)
 create mode 100644 src/build.d

diff --git a/README.md b/README.md
index b123341..9c75296 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,12 @@ Build by running `make` in the `src` directory; if the dependencies aren't insta
 make GTKD=/path/to/gtkd DERELICT=/path/to/Derelict2
 ```
 
+Alternatively, you can run `build.d` from the `src` directory:
+```
+cd src
+rdmd build.d --gtkd=/path/to/gtkd --derelict=/path/to/Derelict2
+```
+
 ### Testing
 
 There are tests for the 6502/65C02 emulation:
diff --git a/src/Makefile b/src/Makefile
index b9e86b3..c6ef2e2 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -7,7 +7,7 @@ LINK_OPTS = -L-lpthread -L-lGL -L-ldl -L-lX11 \
 			-L-L$(GTKD) -L-lgtkd -L-lgtkdgl \
 			-L-L$(DERELICT)/lib -L-lDerelictSDL -L-lDerelictUtil
 
-ALL_SRC = $(shell find -name "*.d" \! -name "ctfe*")
+ALL_SRC = $(shell find -name "*.d" \! -name "ctfe*" \! -name "build.d")
 
 all: ${ALL_SRC}
 	dmd $(COMPILE_OPTS) ${ALL_SRC} -oftwoapple ${LINK_OPTS}
diff --git a/src/build.d b/src/build.d
new file mode 100644
index 0000000..02701bb
--- /dev/null
+++ b/src/build.d
@@ -0,0 +1,66 @@
+import std.algorithm, std.array, std.exception, std.getopt, std.process,
+    std.stdio;
+
+
+string GTKD = "";
+string DERELICT = "";
+
+
+version(GNU)
+    string OPMODE = " -version=OpSwitch ";
+else version(DigitalMars)
+    string OPMODE = " -version=OpNestedSwitch ";
+else
+    static assert(0, "Unsupported compiler");
+
+
+bool notGTKD(string a)
+{
+    return indexOf(a, GTKD) == -1;
+}
+bool compilable(string a)
+{
+    return endsWith(a, ".d") && indexOf(a, "ctfe") == -1;
+}
+
+
+int main(string[] args)
+{
+    getopt(
+        args,
+        "gtkd", &GTKD,
+        "derelict", &DERELICT);
+
+    string opts = "-Jdata " ~ OPMODE;
+    if (GTKD.length)
+        opts ~= " -I" ~ GTKD ~ "/src -I" ~ GTKD ~ "/srcgl ";
+    if (DERELICT.length)
+        opts ~= " -I" ~ DERELICT ~ "/import ";
+    try
+    {
+        auto deps = split(shell("rdmd --makedepend " ~ opts ~ " twoapple.d"));
+        auto d_files = array(filter!compilable(deps));
+        auto without_gtkd = array(filter!notGTKD(d_files));
+        opts = " -inline -release -O -noboundscheck " ~ opts ~
+               " -d -L-lGL -L-ldl -L-lX11 " ~
+               " -L-L" ~ DERELICT ~ "/lib -L-lDerelictSDL -L-lDerelictUtil ";
+        version(DigitalMars)
+        {
+            if (GTKD.length)
+                opts ~= " -L-L" ~ GTKD ~ " -L-lgtkd -L-lgtkdgl ";
+            auto files = join(without_gtkd, " ");
+            return system("dmd " ~ opts ~ " " ~ files);
+        }
+        else version(GNU)
+        {
+            auto files = join(d_files, " ");
+            return system("gdmd " ~ opts ~ " " ~ files);
+        }
+    }
+    catch (ErrnoException e)
+    {
+        return 1;
+    }
+
+    return 0;
+}