Minor java improvements

CHANGES.txt

@@ -70,7 +70,9 @@ RELEASE  VERSION/DATE TO BE FILLED IN LATER
       arguments would yield an exception. This issue was found via qt4 and qt5 tools in
       scons-contrib https://github.com/SCons/scons-contrib/issues/45
 
-
+  From David H:
+    - Add JavaScanner to include JAVACLASSPATH as a dependency when using the Java tool.
+    - Fix incorrect Java classpath generation when a NodeList is used as part of any JAVA*PATH variables.
 
   From Daniel Moody:
     - Add cache-debug messages for push failures.
@@ -296,7 +298,7 @@ RELEASE 4.2.0 - Sat, 31 Jul 2021 18:12:46 -0700
     - Fix Issue #3906 - `IMPLICIT_COMMAND_DEPENDENCIES` was not properly disabled when
       set to any string value (For example ['none','false','no','off'])
       Also previously 'All' wouldn't have the desired affect.
-
+      
   From Ivan Kravets:
     - Provide a custom argument escape function for `TempFileMunge` using a new
       `TEMPFILEARGESCFUNC` variable. Useful if you need to apply extra operations on

RELEASE.txt

@@ -65,6 +65,7 @@ CHANGED/ENHANCED EXISTING FUNCTIONALITY
   output format written to stdout to include more information about the source for each
   message of MSVC initialization debugging output.  A single space was added before the
   message for all debugging output records written to stdout and to files.
+- Add JavaScanner to include JAVACLASSPATH as a dependency when using the Java tool.
 - The build argument (i.e., x86) is no longer passed to the MSVC 6.0 to 7.1 batch
   files.  This may improve the effectiveness of the internal msvc cache when using 
   MSVC detection and when bypassing MSVC detection as the MSVC 6.0 to 7.1 batch files 
@@ -121,6 +122,7 @@ FIXES
   that link has been modified (issue #3880)
 - Fix typo in ninja scons daemon startup which causes ConnectionRefusedError to not retry 
   to connect to the server during start up.
+- Fix incorrect Java classpath generation when a NodeList is used as part of any JAVA*PATH variables.
 - The system environment variable names imported for MSVC 7.0 and 6.0 were updated to be
   consistent with the variables names defined by their respective installers.  This fixes an
   error caused when bypassing MSVC detection by specifying the MSVC 7.0 batch file directly.

SCons/Scanner/Java.py

@@ -0,0 +1,99 @@
+# MIT License
+#
+# Copyright The SCons Foundation
+#
+# 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.
+
+import os 
+
+import SCons.Node
+import SCons.Node.FS
+import SCons.Scanner
+import SCons.Util
+
+
+def _subst_libs(env, libs):
+    """
+    Substitute environment variables and split into list.
+    """
+    if SCons.Util.is_String(libs):
+        libs = env.subst(libs)
+        if SCons.Util.is_String(libs):
+            libs = libs.split()
+    elif SCons.Util.is_Sequence(libs):
+        _libs = []
+        for lib in libs:
+            _libs += _subst_libs(env, lib)
+        libs = _libs
+    else:
+        # libs is an object (Node, for example)
+        libs = [libs]
+    return libs
+
+
+def _collect_classes(list, dirname, files):
+    for fname in files:
+        if os.path.splitext(fname)[1] == ".class":
+            list.append(os.path.join(str(dirname), fname))
+
+
+def scan(node, env, libpath=()):
+    """Scan for files on the JAVACLASSPATH.
+
+    The classpath can contain:
+     - Explicit paths to JAR/Zip files
+     - Wildcards (*)
+     - Directories which contain classes in an unnamed package
+     - Parent directories of the root package for classes in a named package
+
+     Class path entries that are neither directories nor archives (.zip or JAR files) nor the asterisk (*) wildcard character are ignored.
+     """
+    classpath = env.get('JAVACLASSPATH', [])
+    classpath = _subst_libs(env, classpath)
+
+    result = []
+    for path in classpath:
+        if SCons.Util.is_String(path) and "*" in path:
+            libs = env.Glob(path)
+        else:
+            libs = [path]
+
+        for lib in libs:
+            if os.path.isdir(str(lib)):
+                # grab the in-memory nodes
+                env.Dir(lib).walk(_collect_classes, result)
+                # now the on-disk ones
+                for root, dirs, files in os.walk(str(lib)):
+                    _collect_classes(result, root, files)
+            else:
+                result.append(lib)
+
+    return list(filter(lambda x: os.path.splitext(str(x))[1] in [".class", ".zip", ".jar"], result))
+
+
+def JavaScanner():
+    return SCons.Scanner.Base(scan, 'JavaScanner',
+                              skeys=['.java'])
+
+# Local Variables:
+# tab-width:4
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=4 shiftwidth=4:

SCons/Scanner/JavaTests.py

@@ -0,0 +1,160 @@
+# MIT License
+#
+# Copyright The SCons Foundation
+#
+# 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.
+
+import unittest
+import collections
+import os
+
+import TestCmd
+
+import SCons.Scanner.Java
+import SCons.Node.FS
+import SCons.Warnings
+
+
+test = TestCmd.TestCmd(workdir = '')
+test.subdir('com')
+
+files = [
+    'bootclasspath.jar',
+    'classpath.jar',
+    'Test.class',
+    'com/Test.class'
+]
+
+for fname in files:
+    test.write(fname, "\n")
+
+
+class DummyEnvironment(collections.UserDict):
+    def __init__(self,**kw):
+        collections.UserDict.__init__(self)
+        self.data.update(kw)
+        self.fs = SCons.Node.FS.FS(test.workpath(''))
+        self['ENV'] = {}
+
+    def Dictionary(self, *args):
+        return self.data
+
+    def subst(self, strSubst, target=None, source=None, conv=None):
+        if strSubst[0] == '$':
+            return self.data[strSubst[1:]]
+        return strSubst
+
+    def subst_path(self, path, target=None, source=None, conv=None):
+        if not isinstance(path, list):
+            path = [path]
+        return list(map(self.subst, path))
+
+    def has_key(self, key):
+        return key in self.Dictionary()
+
+    def get_calculator(self):
+        return None
+
+    def get_factory(self, factory):
+        return factory or self.fs.File
+
+    def Dir(self, filename):
+        return self.fs.Dir(filename)
+
+    def File(self, filename):
+        return self.fs.File(filename)
+
+    def Glob(self, path):
+        return self.fs.Glob(path)
+
+
+class DummyNode:
+    def __init__(self, name):
+        self.name = name
+
+    def rexists(self):
+        return 1
+
+    def __str__(self):
+        return self.name
+
+
+global my_normpath
+my_normpath = os.path.normpath
+
+if os.path.normcase('foo') == os.path.normcase('FOO'):
+    my_normpath = os.path.normcase
+
+def deps_match(self, deps, headers):
+    scanned = sorted(map(my_normpath, list(map(str, deps))))
+    expect = sorted(map(my_normpath, headers))
+    self.assertTrue(scanned == expect, "expect %s != scanned %s" % (expect, scanned))
+
+
+class JavaScannerEmptyClasspath(unittest.TestCase):
+    def runTest(self):
+        path = []
+        env = DummyEnvironment(JAVASUFFIXES=['.java'],
+                               JAVACLASSPATH=path)
+        s = SCons.Scanner.Java.JavaScanner()
+        deps = s(DummyNode('dummy'), env)
+        expected = []
+        deps_match(self, deps, expected)
+
+
+class JavaScannerClasspath(unittest.TestCase):
+    def runTest(self):
+        env = DummyEnvironment(JAVASUFFIXES=['.java'],
+                               JAVACLASSPATH=[test.workpath('classpath.jar')])
+        s = SCons.Scanner.Java.JavaScanner()
+        deps = s(DummyNode('dummy'), env)
+        expected = ['classpath.jar']
+        deps_match(self, deps, expected)
+
+
+class JavaScannerWildcardClasspath(unittest.TestCase):
+    def runTest(self):
+        env = DummyEnvironment(JAVASUFFIXES=['.java'],
+                               JAVACLASSPATH=[test.workpath('*')])
+        s = SCons.Scanner.Java.JavaScanner()
+        deps = s(DummyNode('dummy'), env)
+        expected = ['bootclasspath.jar', 'classpath.jar', 'Test.class']
+        deps_match(self, deps, expected)
+
+
+class JavaScannerDirClasspath(unittest.TestCase):
+    def runTest(self):
+        env = DummyEnvironment(JAVASUFFIXES=['.java'],
+                               JAVACLASSPATH=[test.workpath()])
+        s = SCons.Scanner.Java.JavaScanner()
+        deps = s(DummyNode('dummy'), env)
+        expected = ['Test.class', 'com/Test.class']
+        deps_match(self, deps, expected)
+
+
+
+if __name__ == "__main__":
+    unittest.main()
+
+# Local Variables:
+# tab-width:4
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=4 shiftwidth=4:

SCons/Tool/__init__.py

@@ -48,6 +48,7 @@
 import SCons.Scanner
 import SCons.Scanner.C
 import SCons.Scanner.D
+import SCons.Scanner.Java
 import SCons.Scanner.LaTeX
 import SCons.Scanner.Prog
 import SCons.Scanner.SWIG
@@ -57,6 +58,7 @@
 
 CScanner = SCons.Scanner.C.CScanner()
 DScanner = SCons.Scanner.D.DScanner()
+JavaScanner = SCons.Scanner.Java.JavaScanner()
 LaTeXScanner = SCons.Scanner.LaTeX.LaTeXScanner()
 PDFLaTeXScanner = SCons.Scanner.LaTeX.PDFLaTeXScanner()
 ProgramScanner = SCons.Scanner.Prog.ProgramScanner()
@@ -521,7 +523,8 @@ def CreateJavaClassFileBuilder(env):
                                                 src_suffix='$JAVASUFFIX',
                                                 src_builder=['JavaFile'],
                                                 target_factory=fs.Entry,
-                                                source_factory=fs.File)
+                                                source_factory=fs.File,
+                                                target_scanner=JavaScanner)
         env['BUILDERS']['JavaClassFile'] = java_class_file
     return java_class_file
 
@@ -535,7 +538,8 @@ def CreateJavaClassDirBuilder(env):
         java_class_dir = SCons.Builder.Builder(action=javac_com,
                                                emitter={},
                                                target_factory=fs.Dir,
-                                               source_factory=fs.Dir)
+                                               source_factory=fs.Dir,
+                                               target_scanner=JavaScanner)
         env['BUILDERS']['JavaClassDir'] = java_class_dir
     return java_class_dir
 

SCons/Tool/javac.py

@@ -157,6 +157,7 @@ def __call__(self, target, source, env, for_signature):
                     default = [default]
                 path = path + default
         if path:
+            path = SCons.Util.flatten(path)
             return [self.opt, os.pathsep.join(map(str, path))]
         else:
             return []

SCons/Tool/javac.xml

@@ -215,15 +215,6 @@ env = Environment(JAVACCOMSTR="Compiling class files $TARGETS from $SOURCES")
                 <filename>;</filename>
                 on Windows).
             </para>
-
-            <para>
-                Note that this currently just adds the specified
-                directory via the <option>-classpath</option> option.
-                &SCons; does not currently search the
-                &cv-JAVACLASSPATH; directories for dependency
-                <filename>.class</filename>
-                files.
-            </para>
         </summary>
     </cvar>
 

SCons/Tool/javacTests.py

@@ -97,6 +97,11 @@ def test_default_unset(self):
             ['-foopath', '/foo'],
             '/foo',
             '')
+
+    def test_list_within_list(self):
+        self.assert_pathopt(['-foopath', os.pathsep.join(['/foo','/bar'])],
+                    ['/foo', ['/bar']])
+
 
 if __name__ == "__main__":
     unittest.main()