Implement implicit dependency caching.

2 files changed, 180 insertions, 1 deletions

diff --git a/test/option--implicit-cache.py b/test/option--implicit-cache.py
new file mode 100644
index 0000000..fb5ace2
--- /dev/null
+++ b/test/option--implicit-cache.py
@@ -0,0 +1,177 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2001, 2002 Steven Knight
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
+
+import os
+import sys
+import TestSCons
+
+if sys.platform == 'win32':
+    _exe = '.exe'
+else:
+    _exe = ''
+
+prog = 'prog' + _exe
+subdir_prog = os.path.join('subdir', 'prog' + _exe)
+variant_prog = os.path.join('variant', 'prog' + _exe)
+
+args = prog + ' ' + subdir_prog + ' ' + variant_prog
+
+test = TestSCons.TestSCons()
+
+test.subdir('include', 'subdir', ['subdir', 'include'], 'inc2')
+
+test.write('SConstruct', """
+env = Environment(CPPPATH = 'inc2 include')
+obj = env.Object(target='prog', source='subdir/prog.c')
+env.Program(target='prog', source=obj)
+SConscript('subdir/SConscript', "env")
+
+BuildDir('variant', 'subdir', 0)
+include = Dir('include')
+env = Environment(CPPPATH=['inc2', include])
+SConscript('variant/SConscript', "env")
+""")
+
+test.write(['subdir', 'SConscript'],
+"""
+Import("env")
+env.Program(target='prog', source='prog.c')
+""")
+
+test.write(['include', 'foo.h'],
+r"""
+#define	FOO_STRING "include/foo.h 1\n"
+#include <bar.h>
+""")
+
+test.write(['include', 'bar.h'],
+r"""
+#define BAR_STRING "include/bar.h 1\n"
+""")
+
+test.write(['subdir', 'prog.c'],
+r"""
+#include <foo.h>
+#include <stdio.h>
+
+int
+main(int argc, char *argv[])
+{
+    argv[argc++] = "--";
+    printf("subdir/prog.c\n");
+    printf(FOO_STRING);
+    printf(BAR_STRING);
+    return 0;
+}
+""")
+
+test.write(['subdir', 'include', 'foo.h'],
+r"""
+#define	FOO_STRING "subdir/include/foo.h 1\n"
+#include "bar.h"
+""")
+
+test.write(['subdir', 'include', 'bar.h'],
+r"""
+#define BAR_STRING "subdir/include/bar.h 1\n"
+""")
+
+
+
+test.run(arguments = "--implicit-cache " + args)
+
+test.run(program = test.workpath(prog),
+         stdout = "subdir/prog.c\ninclude/foo.h 1\ninclude/bar.h 1\n")
+
+test.run(program = test.workpath(subdir_prog),
+         stdout = "subdir/prog.c\nsubdir/include/foo.h 1\nsubdir/include/bar.h 1\n")
+
+test.run(program = test.workpath(variant_prog),
+         stdout = "subdir/prog.c\ninclude/foo.h 1\ninclude/bar.h 1\n")
+
+test.up_to_date(arguments = args)
+
+# Make sure implicit dependenies work right when one is modifed:
+test.write(['include', 'foo.h'],
+r"""
+#define	FOO_STRING "include/foo.h 2\n"
+#include "bar.h"
+""")
+
+test.run(arguments = "--implicit-cache " + args)
+
+test.run(program = test.workpath(prog),
+         stdout = "subdir/prog.c\ninclude/foo.h 2\ninclude/bar.h 1\n")
+
+test.run(program = test.workpath(subdir_prog),
+         stdout = "subdir/prog.c\nsubdir/include/foo.h 1\nsubdir/include/bar.h 1\n")
+
+test.run(program = test.workpath(variant_prog),
+         stdout = "subdir/prog.c\ninclude/foo.h 2\ninclude/bar.h 1\n")
+
+test.up_to_date(arguments = args)
+
+# Add inc2/foo.h that should shadow include/foo.h, but
+# because of implicit dependency caching, scons doesn't
+# detect this:
+test.write(['inc2', 'foo.h'],
+r"""
+#define FOO_STRING "inc2/foo.h 1\n"
+#include <bar.h>
+""")
+
+test.run(arguments = "--implicit-cache " + args)
+
+test.run(arguments = "--implicit-cache " + args)
+
+test.run(program = test.workpath(prog),
+         stdout = "subdir/prog.c\ninclude/foo.h 2\ninclude/bar.h 1\n")
+
+test.run(program = test.workpath(subdir_prog),
+         stdout = "subdir/prog.c\nsubdir/include/foo.h 1\nsubdir/include/bar.h 1\n")
+
+test.run(program = test.workpath(variant_prog),
+         stdout = "subdir/prog.c\ninclude/foo.h 2\ninclude/bar.h 1\n")
+
+# Now modifying include/foo.h should make scons aware of inc2/foo.h
+test.write(['include', 'foo.h'],
+r"""
+#define	FOO_STRING "include/foo.h 3\n"
+#include "bar.h"
+""")
+
+test.run(arguments = "--implicit-cache " + args)
+
+test.run(program = test.workpath(prog),
+         stdout = "subdir/prog.c\ninc2/foo.h 1\ninclude/bar.h 1\n")
+
+test.run(program = test.workpath(subdir_prog),
+         stdout = "subdir/prog.c\nsubdir/include/foo.h 1\nsubdir/include/bar.h 1\n")
+
+test.run(program = test.workpath(variant_prog),
+         stdout = "subdir/prog.c\ninclude/foo.h 3\ninclude/bar.h 1\n")
+
+test.pass_test()
diff --git a/test/sconsign.py b/test/sconsign.py
index 55ec958..76d8220 100644
--- a/test/sconsign.py
+++ b/test/sconsign.py
@@ -29,7 +29,7 @@ import TestSCons
 
 test = TestSCons.TestSCons()
 
-test.subdir('sub1', 'sub2')
+test.subdir('sub1', 'sub2', 'sub3')
 
 test.write('SConstruct', """
 def build1(target, source, env):
@@ -49,12 +49,14 @@ B2 = Builder(name = "B2", action = build2)
 env = Environment(BUILDERS = [B1, B2])
 env.B1(target = 'sub1/foo.out', source = 'foo.in')
 env.B2(target = 'sub2/foo.out', source = 'foo.in')
+env.B2(target = 'sub3/foo.out', source = 'foo.in')
 """)
 
 test.write('foo.in', "foo.in\n")
 
 sub1__sconsign = test.workpath('sub1', '.sconsign')
 sub2__sconsign = test.workpath('sub2', '.sconsign')
+sub3__sconsign = test.workpath('sub3', '.sconsign')
 
 test.write(sub1__sconsign, "")
 test.write(sub2__sconsign, "")