Modernize stat usage

Since Python 2.2, the object returned by an os.stat() call presents
attributes matching the 10-tuple of stat values. Use these instead of
indexing into the tuple.

As usual for non-removed tests, minor tweaks made if needed -
copyright header and DefautlEnvironment() call for performance.

Signed-off-by: Mats Wichmann <[email protected]>

CHANGES.txt

@@ -181,6 +181,8 @@ RELEASE  VERSION/DATE TO BE FILLED IN LATER
       Only object-like macros are replaced (not function-like), and
       only on a whole-word basis; recursion is limited to five levels
       and does not error out if that limit is reached (issue #4523).
+    - Minor modernization: make use of stat object's st_mode, st_mtime
+      and other attributes rather than indexing into stat return.
 
 
 RELEASE 4.8.1 -  Tue, 03 Sep 2024 17:22:20 -0700

RELEASE.txt

@@ -164,6 +164,10 @@ FIXES
   only on a whole-word basis; recursion is limited to five levels
   and does not error out if that limit is reached (issue #4523).
 
+- Minor modernization: make use of stat object's st_mode, st_mtime
+  and other attributes rather than indexing into stat return.
+
+
 IMPROVEMENTS
 ------------
 

SCons/CacheDir.py

@@ -71,7 +71,7 @@ def CacheRetrieveFunc(target, source, env) -> int:
             except OSError:
                 pass
         st = fs.stat(cachefile)
-        fs.chmod(t.get_internal_path(), stat.S_IMODE(st[stat.ST_MODE]) | stat.S_IWRITE)
+        fs.chmod(t.get_internal_path(), stat.S_IMODE(st.st_mode) | stat.S_IWRITE)
     return 0
 
 def CacheRetrieveString(target, source, env) -> str:

SCons/Node/FS.py

@@ -762,7 +762,7 @@ def getmtime(self):
         st = self.stat()
 
         if st:
-            return st[stat.ST_MTIME]
+            return st.st_mtime
         else:
             return None
 

SCons/Node/FSTests.py

@@ -774,7 +774,7 @@ def test_update(self) -> None:
 
         ni.update(fff)
 
-        mtime = st[stat.ST_MTIME]
+        mtime = st.st_mtime
         assert ni.timestamp == mtime, (ni.timestamp, mtime)
         size = st.st_size
         assert ni.size == size, (ni.size, size)
@@ -786,7 +786,7 @@ def test_update(self) -> None:
 
         st = os.stat('fff')
 
-        mtime = st[stat.ST_MTIME]
+        mtime = st.st_mtime
         assert ni.timestamp != mtime, (ni.timestamp, mtime)
         size = st.st_size
         assert ni.size != size, (ni.size, size)

SCons/Tool/install.py

@@ -176,7 +176,7 @@ def copyFunc(dest, source, env) -> int:
     else:
         copy2(source, dest)
         st = os.stat(source)
-        os.chmod(dest, stat.S_IMODE(st[stat.ST_MODE]) | stat.S_IWRITE)
+        os.chmod(dest, stat.S_IMODE(st.st_mode) | stat.S_IWRITE)
 
     return 0
 
@@ -204,7 +204,7 @@ def copyFuncVersionedLib(dest, source, env) -> int:
             pass
         copy2(source, dest)
         st = os.stat(source)
-        os.chmod(dest, stat.S_IMODE(st[stat.ST_MODE]) | stat.S_IWRITE)
+        os.chmod(dest, stat.S_IMODE(st.st_mode) | stat.S_IWRITE)
         installShlibLinks(dest, source, env)
 
     return 0

site_scons/Utilities.py

@@ -31,7 +31,7 @@ def whereis(filename):
                     st = os.stat(f_ext)
                 except:
                     continue
-                if stat.S_IMODE(st[stat.ST_MODE]) & 0o111:
+                if stat.S_IMODE(st.st_mode) & stat.S_IXUSR:
                     return f_ext
     return None
 

test/Actions/append.py

@@ -63,7 +63,7 @@ def after(env, target, source):
 
 test.run(arguments='.')
 test.must_match('before.txt', 'Bar\n')
-os.chmod(after_exe, os.stat(after_exe)[stat.ST_MODE] | stat.S_IXUSR)
+os.chmod(after_exe, os.stat(after_exe).st_mode | stat.S_IXUSR)
 test.run(program=after_exe, stdout="Foo\n")
 test.pass_test()
 

test/Actions/pre-post.py

@@ -50,7 +50,7 @@ def before(env, target, source):
     a=str(target[0])
     with open(a, "wb") as f:
         f.write(b"Foo\\n")
-    os.chmod(a, os.stat(a)[stat.ST_MODE] | stat.S_IXUSR)
+    os.chmod(a, os.stat(a).st_mode | stat.S_IXUSR)
     with open("before.txt", "ab") as f:
         f.write((os.path.splitext(str(target[0]))[0] + "\\n").encode())
 
@@ -59,7 +59,7 @@ def after(env, target, source):
     a = "after_" + t
     with open(t, "rb") as fin, open(a, "wb") as fout:
         fout.write(fin.read())
-    os.chmod(a, os.stat(a)[stat.ST_MODE] | stat.S_IXUSR)
+    os.chmod(a, os.stat(a).st_mode | stat.S_IXUSR)
 
 foo = env.Program(source='foo.c', target='foo')
 AddPreAction(foo, before)

test/Chmod.py

@@ -51,6 +51,7 @@ def cat(env, source, target):
                 f.write(infp.read())
 
 Cat = Action(cat)
+DefaultEnvironment(tools=[])  # test speedup
 env = Environment()
 env.Command(
     'bar.out',
@@ -154,92 +155,92 @@ def cat(env, source, target):
 """)
 test.run(options = '-n', arguments = '.', stdout = expect)
 
-s = stat.S_IMODE(os.stat(test.workpath('f1'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f1')).st_mode)
 test.fail_test(s != 0o444)
-s = stat.S_IMODE(os.stat(test.workpath('f1-File'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f1-File')).st_mode)
 test.fail_test(s != 0o444)
-s = stat.S_IMODE(os.stat(test.workpath('d2'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d2')).st_mode)
 test.fail_test(s != 0o555)
-s = stat.S_IMODE(os.stat(test.workpath('d2-Dir'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d2-Dir')).st_mode)
 test.fail_test(s != 0o555)
 test.must_not_exist('bar.out')
-s = stat.S_IMODE(os.stat(test.workpath('f3'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f3')).st_mode)
 test.fail_test(s != 0o444)
-s = stat.S_IMODE(os.stat(test.workpath('d4'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d4')).st_mode)
 test.fail_test(s != 0o555)
-s = stat.S_IMODE(os.stat(test.workpath('f5'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f5')).st_mode)
 test.fail_test(s != 0o444)
 test.must_not_exist('f6.out')
 test.must_not_exist('f7.out')
-s = stat.S_IMODE(os.stat(test.workpath('Chmod-f7.in'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('Chmod-f7.in')).st_mode)
 test.fail_test(s != 0o444)
-s = stat.S_IMODE(os.stat(test.workpath('f7.out-Chmod'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f7.out-Chmod')).st_mode)
 test.fail_test(s != 0o444)
 test.must_not_exist('f8.out')
-s = stat.S_IMODE(os.stat(test.workpath('f9'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f9')).st_mode)
 test.fail_test(s != 0o444)
-s = stat.S_IMODE(os.stat(test.workpath('f10'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f10')).st_mode)
 test.fail_test(s != 0o444)
-s = stat.S_IMODE(os.stat(test.workpath('d11'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d11')).st_mode)
 test.fail_test(s != 0o555)
-s = stat.S_IMODE(os.stat(test.workpath('d12'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d12')).st_mode)
 test.fail_test(s != 0o555)
-s = stat.S_IMODE(os.stat(test.workpath('f13'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f13')).st_mode)
 test.fail_test(s != 0o444)
-s = stat.S_IMODE(os.stat(test.workpath('f14'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f14')).st_mode)
 test.fail_test(s != 0o444)
-s = stat.S_IMODE(os.stat(test.workpath('f15'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f15')).st_mode)
 test.fail_test(s != 0o444)
-s = stat.S_IMODE(os.stat(test.workpath('d16'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d16')).st_mode)
 test.fail_test(s != 0o555)
-s = stat.S_IMODE(os.stat(test.workpath('d17'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d17')).st_mode)
 test.fail_test(s != 0o555)
-s = stat.S_IMODE(os.stat(test.workpath('d18'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d18')).st_mode)
 test.fail_test(s != 0o555)
 
 test.run()
 
-s = stat.S_IMODE(os.stat(test.workpath('f1'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f1')).st_mode)
 test.fail_test(s != 0o666)
-s = stat.S_IMODE(os.stat(test.workpath('f1-File'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f1-File')).st_mode)
 test.fail_test(s != 0o666)
-s = stat.S_IMODE(os.stat(test.workpath('d2'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d2')).st_mode)
 test.fail_test(s != 0o777)
-s = stat.S_IMODE(os.stat(test.workpath('d2-Dir'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d2-Dir')).st_mode)
 test.fail_test(s != 0o777)
 test.must_match('bar.out', "bar.in\n")
-s = stat.S_IMODE(os.stat(test.workpath('f3'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f3')).st_mode)
 test.fail_test(s != 0o666)
-s = stat.S_IMODE(os.stat(test.workpath('d4'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d4')).st_mode)
 test.fail_test(s != 0o777)
-s = stat.S_IMODE(os.stat(test.workpath('f5'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f5')).st_mode)
 test.fail_test(s != 0o666)
 test.must_match('f6.out', "f6.in\n")
 test.must_match('f7.out', "f7.in\n")
-s = stat.S_IMODE(os.stat(test.workpath('Chmod-f7.in'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('Chmod-f7.in')).st_mode)
 test.fail_test(s != 0o666)
-s = stat.S_IMODE(os.stat(test.workpath('f7.out-Chmod'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f7.out-Chmod')).st_mode)
 test.fail_test(s != 0o666)
 test.must_match('f8.out', "f8.in\n")
-s = stat.S_IMODE(os.stat(test.workpath('f9'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f9')).st_mode)
 test.fail_test(s != 0o666)
-s = stat.S_IMODE(os.stat(test.workpath('f10'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f10')).st_mode)
 test.fail_test(s != 0o666)
-s = stat.S_IMODE(os.stat(test.workpath('d11'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d11')).st_mode)
 test.fail_test(s != 0o777)
-s = stat.S_IMODE(os.stat(test.workpath('d12'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d12')).st_mode)
 test.fail_test(s != 0o777)
-s = stat.S_IMODE(os.stat(test.workpath('f13'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f13')).st_mode)
 test.fail_test(s != 0o444)
-s = stat.S_IMODE(os.stat(test.workpath('f14'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f14')).st_mode)
 test.fail_test(s != 0o666)
-s = stat.S_IMODE(os.stat(test.workpath('f15'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('f15')).st_mode)
 test.fail_test(s != 0o666)
-s = stat.S_IMODE(os.stat(test.workpath('d16'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d16')).st_mode)
 test.fail_test(s != 0o777)
-s = stat.S_IMODE(os.stat(test.workpath('d17'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d17')).st_mode)
 test.fail_test(s != 0o777)
-s = stat.S_IMODE(os.stat(test.workpath('d18'))[stat.ST_MODE])
+s = stat.S_IMODE(os.stat(test.workpath('d18')).st_mode)
 test.fail_test(s != 0o777)
 
 test.pass_test()

test/Decider/MD5-timestamp-Repository.py

@@ -58,7 +58,7 @@
 test.sleep()  # delay for timestamps
 test.write(['Repository','content1.in'], "content1.in 2\n")
 test.touch(['Repository','content2.in'])
-time_content = os.stat(os.path.join(repository,'content3.in'))[stat.ST_MTIME]
+time_content = os.stat(os.path.join(repository,'content3.in')).st_mtime
 test.write(['Repository','content3.in'], "content3.in 2\n")
 test.touch(['Repository','content3.in'], time_content)
 

test/Decider/MD5-timestamp.py

@@ -54,7 +54,7 @@
 test.write('content1.in', "content1.in 2\n")
 test.touch('content2.in')
 
-time_content = os.stat('content3.in')[stat.ST_MTIME]
+time_content = os.stat('content3.in').st_mtime
 test.write('content3.in', "content3.in 2\n")
 test.touch('content3.in', time_content)
 

test/Decider/timestamp.py

@@ -55,8 +55,8 @@
 test.run(arguments = '.')
 test.up_to_date(arguments = '.')
 
-time_match = os.stat('match2.out')[stat.ST_MTIME]
-time_newer = os.stat('newer2.out')[stat.ST_MTIME]
+time_match = os.stat('match2.out').st_mtime
+time_newer = os.stat('newer2.out').st_mtime
 
 # Now make all the source files newer than (different timestamps from)
 # the last time the targets were built, and touch the target files

test/Removed/BuildDir/Old/BuildDir.py

@@ -224,16 +224,16 @@ def filter_tempnam(err):
 def equal_stats(x,y):
     x = os.stat(x)
     y = os.stat(y)
-    return (stat.S_IMODE(x[stat.ST_MODE]) == stat.S_IMODE(y[stat.ST_MODE]) and
-            x[stat.ST_MTIME] ==  y[stat.ST_MTIME])
+    return (stat.S_IMODE(x.st_mode) == stat.S_IMODE(y.st_mode) and
+            x.st_mtime ==  y.st_mtime)
 
 # Make sure we did duplicate the source files in build/var2,
 # and that their stats are the same:
 test.must_exist(['work1', 'build', 'var2', 'f1.c'])
 test.must_exist(['work1', 'build', 'var2', 'f2.in'])
 test.fail_test(not equal_stats(test.workpath('work1', 'build', 'var2', 'f1.c'), test.workpath('work1', 'src', 'f1.c')))
 test.fail_test(not equal_stats(test.workpath('work1', 'build', 'var2', 'f2.in'), test.workpath('work1', 'src', 'f2.in')))
- 
+
 # Make sure we didn't duplicate the source files in build/var3.
 test.must_not_exist(['work1', 'build', 'var3', 'f1.c'])
 test.must_not_exist(['work1', 'build', 'var3', 'f2.in'])

test/Removed/BuildDir/Old/SConscript-build_dir.py

@@ -1,6 +1,8 @@
 #!/usr/bin/env python
 #
-# __COPYRIGHT__
+# 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
@@ -20,9 +22,6 @@
 # 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__"
 
 """
 Verify that specifying a build_dir argument to SConscript still works.
@@ -108,7 +107,7 @@ def cat(env, source, target):
 # VariantDir('build/var9', '.')
 # SConscript('build/var9/src/SConscript')
 SConscript('src/SConscript', build_dir='build/var9', src_dir='.')
-""") 
+""")
 
 test.subdir(['test', 'src'], ['test', 'alt'])
 
@@ -152,8 +151,8 @@ def cat(env, source, target):
 def equal_stats(x,y):
     x = os.stat(x)
     y = os.stat(y)
-    return (stat.S_IMODE(x[stat.ST_MODE]) == stat.S_IMODE(y[stat.ST_MODE]) and
-            x[stat.ST_MTIME] ==  y[stat.ST_MTIME])
+    return (stat.S_IMODE(x.st_mode) == stat.S_IMODE(y.st_mode) and
+            x.st_mtime ==  y.st_mtime)
 
 # Make sure we did duplicate the source files in build/var1,
 # and that their stats are the same:
@@ -168,12 +167,12 @@ def equal_stats(x,y):
     test.must_exist(test.workpath('test', 'build', 'var2', file))
     test.fail_test(not equal_stats(test.workpath('test', 'build', 'var2', file),
                                    test.workpath('test', 'src', file)))
- 
+
 # Make sure we didn't duplicate the source files in build/var3.
 test.must_not_exist(test.workpath('test', 'build', 'var3', 'aaa.in'))
 test.must_not_exist(test.workpath('test', 'build', 'var3', 'bbb.in'))
 test.must_not_exist(test.workpath('test', 'build', 'var3', 'ccc.in'))
- 
+
 #XXX We can't support var4 and var5 yet, because our VariantDir linkage
 #XXX is to an entire source directory.  We haven't yet generalized our
 #XXX infrastructure to be able to take the SConscript file from one source
@@ -200,12 +199,12 @@ def equal_stats(x,y):
     test.must_exist(test.workpath('build', 'var6', file))
     test.fail_test(not equal_stats(test.workpath('build', 'var6', file),
                                    test.workpath('test', 'src', file)))
- 
+
 # Make sure we didn't duplicate the source files in build/var7.
 test.must_not_exist(test.workpath('build', 'var7', 'aaa.in'))
 test.must_not_exist(test.workpath('build', 'var7', 'bbb.in'))
 test.must_not_exist(test.workpath('build', 'var7', 'ccc.in'))
- 
+
 # Make sure we didn't duplicate the source files in build/var8.
 test.must_not_exist(test.workpath('build', 'var8', 'aaa.in'))
 test.must_not_exist(test.workpath('build', 'var8', 'bbb.in'))
@@ -219,6 +218,7 @@ def equal_stats(x,y):
 """)
 
 test.write(['test2', 'SConscript'], """\
+DefaultEnvironment(tools=[])  # test speedup
 env = Environment()
 foo_obj = env.Object('foo.c')
 env.Program('foo', [foo_obj, 'bar.c'])