Add fast-check target that combines the stage2 run-pass suite into a single executable.

src/etc/combine-tests.py

@@ -0,0 +1,66 @@
+#!/usr/bin/env python
+
+# this combines all the working run-pass tests into a single large crate so we
+# can run it "fast": spawning zillions of windows processes is our major build
+# bottleneck (and it doesn't hurt to run faster on other platforms as well).
+
+import sys, os, re
+
+def scrub(b):
+  if sys.version_info >= (3,) and type(b) == bytes:
+    return b.decode('ascii')
+  else:
+    return b
+
+src_dir = scrub(os.getenv("CFG_SRC_DIR"))
+if not src_dir:
+  raise Exception("missing env var CFG_SRC_DIR")
+
+run_pass = os.path.join(src_dir, "src", "test", "run-pass")
+stage2_tests = []
+take_args = {}
+
+for t in os.listdir(run_pass):
+    if t.endswith(".rs"):
+        f = open(os.path.join(run_pass, t))
+        s = f.read()
+        if not ("xfail-stage2" in s):
+            stage2_tests.append(t)
+            if "main(vec[str] args)" in s:
+                take_args[t] = True
+        f.close()
+
+stage2_tests.sort()
+
+# add a .. prefix because we're about to write down into test/..
+parent_run_pass = os.path.join("..", run_pass);
+
+
+c = open("test/run_pass_stage2.rc", "w")
+i = 0
+c.write("// AUTO-GENERATED FILE: DO NOT EDIT\n")
+c.write("#[link(name=\"run_pass_stage2\", vers=\"0.1\")];\n")
+for t in stage2_tests:
+    c.write("mod t_%d = \"%s\";\n"
+            % (i, os.path.join(parent_run_pass, t)))
+    i += 1
+c.close()
+
+
+d = open("test/run_pass_stage2_driver.rs", "w")
+d.write("// AUTO-GENERATED FILE: DO NOT EDIT\n")
+d.write("use std;\n")
+d.write("use run_pass_stage2;\n")
+d.write("import run_pass_stage2::*;\n")
+d.write("fn main() {\n");
+d.write("    auto out = std::io::stdout();\n");
+i = 0
+for t in stage2_tests:
+    d.write("    out.write_str(\"run-pass [stage2]: %s\\n\");\n"
+            % os.path.join("test", "run-pass", t))
+    if t in take_args:
+        d.write("    t_%d::main([\"arg0\"]);\n" % i)
+    else:
+        d.write("    t_%d::main();\n" % i)
+    i += 1
+d.write("}\n")