From 755fe44095622d2ed2ac7a469686286212ea6f3c Mon Sep 17 00:00:00 2001
From: Steven Knight <knight@baldmt.com>
Date: Wed, 24 Apr 2002 16:11:40 +0000
Subject: Make Alias work with -U, -u, and -D (Anthony Roach)

---
 src/CHANGES.txt                |  2 ++
 src/engine/SCons/Node/Alias.py |  6 ++++++
 test/option--D.py              | 17 +++++++++++++++--
 test/option--U.py              | 19 +++++++++++++++++--
 test/option-u.py               |  8 ++++++--
 5 files changed, 46 insertions(+), 6 deletions(-)

diff --git a/src/CHANGES.txt b/src/CHANGES.txt
index 41b5899..ce10511 100644
--- a/src/CHANGES.txt
+++ b/src/CHANGES.txt
@@ -122,6 +122,8 @@ RELEASE 0.07 -
   - Fixed use of sys.path so Python modules can be imported from
     the SConscript directory.
 
+  - Fix for using Aliases with the -u, -U and -D options.
+
   From Moshe Zadka:
   
   - Changes for official Debian packaging.
diff --git a/src/engine/SCons/Node/Alias.py b/src/engine/SCons/Node/Alias.py
index 31f0a9b..c6159da 100644
--- a/src/engine/SCons/Node/Alias.py
+++ b/src/engine/SCons/Node/Alias.py
@@ -87,6 +87,12 @@ class Alias(SCons.Node.Node):
     def sconsign(self):
         """An Alias is not recorded in .sconsign files"""
         pass
+
+    def is_under(self, dir):
+	# Make Alias nodes get built regardless of 
+	# what directory scons was run from. Alias nodes
+	# are outside the filesystem:
+	return 1
         
 default_ans = AliasNameSpace()
 
diff --git a/test/option--D.py b/test/option--D.py
index 572cd65..b1d06b0 100644
--- a/test/option--D.py
+++ b/test/option--D.py
@@ -26,6 +26,7 @@ __revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
 
 import sys
 import TestSCons
+import os
 
 python = sys.executable
 
@@ -42,8 +43,9 @@ file.close()
 """)
 
 test.write('SConstruct', """
+import SCons.Defaults
 B = Builder(name='B', action='%s build.py $TARGET $SOURCES')
-env = Environment(BUILDERS = [B])
+env = Environment(BUILDERS = [B, SCons.Defaults.Alias])
 env.B(target = 'sub1/foo.out', source = 'sub1/foo.in')
 Export('env')
 SConscript('sub1/SConscript')
@@ -60,8 +62,9 @@ test.write(['sub1', 'foo.in'], "sub1/foo.in")
 
 test.write(['sub2', 'SConscript'], """
 Import('env')
-env.B(target = 'bar.out', source = 'bar.in')
+env.Alias('bar', env.B(target = 'bar.out', source = 'bar.in'))
 Default('.')
+
 """)
 
 test.write(['sub2', 'bar.in'], "sub2/bar.in")
@@ -71,5 +74,15 @@ test.run(arguments = '-D', chdir = 'sub1')
 test.fail_test(test.read(['sub1', 'foo.out']) != "sub1/foo.in")
 test.fail_test(test.read(['sub2', 'bar.out']) != "sub2/bar.in")
 
+test.unlink(['sub1', 'foo.out'])
+test.unlink(['sub2', 'bar.out'])
+
+test.run(arguments = '-D bar', chdir = 'sub1')
+
+test.fail_test(os.path.exists(test.workpath('sub1', 'foo.out')))
+test.fail_test(not os.path.exists(test.workpath('sub2', 'bar.out')))
+
+
+
 test.pass_test()
 
diff --git a/test/option--U.py b/test/option--U.py
index 128e6c1..7f3e3f2 100644
--- a/test/option--U.py
+++ b/test/option--U.py
@@ -44,8 +44,9 @@ file.close()
 """)
 
 test.write('SConstruct', """
+import SCons.Defaults
 B = Builder(name='B', action='%s build.py $TARGET $SOURCES')
-env = Environment(BUILDERS = [B])
+env = Environment(BUILDERS = [B, SCons.Defaults.Alias])
 Default(env.B(target = 'sub1/foo.out', source = 'sub1/foo.in'))
 Export('env')
 SConscript('sub2/SConscript')
@@ -57,7 +58,9 @@ Default(env.B(target = 'sub2/xxx.out', source = 'xxx.in'))
 
 test.write(['sub2', 'SConscript'], """
 Import('env')
-Default(env.B(target = 'bar.out', source = 'bar.in'))
+bar = env.B(target = 'bar.out', source = 'bar.in')
+Default(bar)
+env.Alias('bar', bar)
 Default(env.B(target = '../bar.out', source = 'bar.in'))
 """)
 
@@ -106,5 +109,17 @@ test.fail_test(not os.path.exists(test.workpath('sub3', 'baz.out')))
 test.fail_test(os.path.exists(test.workpath('bar.out')))
 test.fail_test(not os.path.exists(test.workpath('sub2/xxx.out')))
 
+test.unlink(['sub1', 'foo.out'])
+test.unlink(['sub3', 'baz.out'])
+test.unlink(['sub2', 'xxx.out'])
+
+test.run(chdir = 'sub3', arguments='-U bar')
+test.fail_test(os.path.exists(test.workpath('sub1', 'foo.out')))
+test.fail_test(not os.path.exists(test.workpath('sub2', 'bar.out')))
+test.fail_test(not os.path.exists(test.workpath('sub2b', 'bar.out')))
+test.fail_test(os.path.exists(test.workpath('sub3', 'baz.out')))
+test.fail_test(os.path.exists(test.workpath('bar.out')))
+test.fail_test(os.path.exists(test.workpath('sub2/xxx.out')))
+
 
 test.pass_test()
diff --git a/test/option-u.py b/test/option-u.py
index dbeec6a..8f23746 100644
--- a/test/option-u.py
+++ b/test/option-u.py
@@ -44,13 +44,14 @@ file.close()
 """)
 
 test.write('SConstruct', """
+import SCons.Defaults
 B = Builder(name='B', action='%s build.py $TARGET $SOURCES')
-env = Environment(BUILDERS = [B])
+env = Environment(BUILDERS = [B, SCons.Defaults.Alias])
 env.B(target = 'sub1/foo.out', source = 'sub1/foo.in')
 Default('.')
 Export('env')
 SConscript('sub2/SConscript')
-env.B(target = 'sub3/baz.out', source = 'sub3/baz.in')
+env.Alias('baz', env.B(target = 'sub3/baz.out', source = 'sub3/baz.in'))
 """ % python)
 
 test.write(['sub2', 'SConscript'], """
@@ -73,5 +74,8 @@ test.run(chdir = 'sub2', arguments = '-u')
 test.fail_test(test.read(['sub2', 'bar.out']) != "sub2/bar.in")
 test.fail_test(os.path.exists(test.workpath('sub3', 'baz.out')))
 
+test.run(chdir = 'sub2', arguments = '-u baz')
+test.fail_test(test.read(['sub3', 'baz.out']) != "sub3/baz.in")
+
 test.pass_test()
  
-- 
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