Moved scipy directory to numpy

1 files changed, 645 insertions, 0 deletions

diff --git a/numpy/distutils/exec_command.py b/numpy/distutils/exec_command.py
new file mode 100644
index 000000000..6c5554bba
--- /dev/null
+++ b/numpy/distutils/exec_command.py
@@ -0,0 +1,645 @@
+#!/usr/bin/env python
+"""
+exec_command
+
+Implements exec_command function that is (almost) equivalent to
+commands.getstatusoutput function but on NT, DOS systems the
+returned status is actually correct (though, the returned status
+values may be different by a factor). In addition, exec_command
+takes keyword arguments for (re-)defining environment variables.
+
+Provides functions:
+  exec_command  --- execute command in a specified directory and
+                    in the modified environment.
+  splitcmdline  --- inverse of ' '.join(argv)
+  find_executable --- locate a command using info from environment
+                    variable PATH. Equivalent to posix `which`
+                    command.
+
+Author: Pearu Peterson <pearu@cens.ioc.ee>
+Created: 11 January 2003
+
+Requires: Python 2.x
+
+Succesfully tested on:
+  os.name | sys.platform | comments
+  --------+--------------+----------
+  posix   | linux2       | Debian (sid) Linux, Python 2.1.3+, 2.2.3+, 2.3.3
+                           PyCrust 0.9.3, Idle 1.0.2
+  posix   | linux2       | Red Hat 9 Linux, Python 2.1.3, 2.2.2, 2.3.2
+  posix   | sunos5       | SunOS 5.9, Python 2.2, 2.3.2
+  posix   | darwin       | Darwin 7.2.0, Python 2.3
+  nt      | win32        | Windows Me
+                           Python 2.3(EE), Idle 1.0, PyCrust 0.7.2
+                           Python 2.1.1 Idle 0.8
+  nt      | win32        | Windows 98, Python 2.1.1. Idle 0.8
+  nt      | win32        | Cygwin 98-4.10, Python 2.1.1(MSC) - echo tests
+                           fail i.e. redefining environment variables may
+                           not work. FIXED: don't use cygwin echo!
+                           Comment: also `cmd /c echo` will not work
+                           but redefining environment variables do work.
+  posix   | cygwin       | Cygwin 98-4.10, Python 2.3.3(cygming special)
+  nt      | win32        | Windows XP, Python 2.3.3
+
+Known bugs:
+- Tests, that send messages to stderr, fail when executed from MSYS prompt
+  because the messages are lost at some point.
+"""
+
+__all__ = ['exec_command','find_executable']
+
+import os
+import re
+import sys
+import tempfile
+
+############################################################
+
+from log import _global_log as log
+
+############################################################
+
+def get_pythonexe():
+    pythonexe = sys.executable
+    if os.name in ['nt','dos']:
+        fdir,fn = os.path.split(pythonexe)
+        fn = fn.upper().replace('PYTHONW','PYTHON')
+        pythonexe = os.path.join(fdir,fn)
+        assert os.path.isfile(pythonexe),`pythonexe`+' is not a file'
+    return pythonexe
+
+############################################################
+
+def splitcmdline(line):
+    """ Inverse of ' '.join(sys.argv).
+    """
+    log.debug('splitcmdline(%r)' % (line))
+    lst = []
+    flag = 0
+    s,pc,cc = '','',''
+    for nc in line+' ':
+        if flag==0:
+            flag = (pc != '\\' and \
+                     ((cc=='"' and 1) or (cc=="'" and 2) or \
+                       (cc==' ' and pc!=' ' and -2))) or flag
+        elif flag==1:
+            flag = (cc=='"' and pc!='\\' and nc==' ' and -1) or flag
+        elif flag==2:
+            flag = (cc=="'" and pc!='\\' and nc==' ' and -1) or flag
+        if flag!=-2:
+            s += cc
+        if flag<0:
+            flag = 0
+            s = s.strip()
+            if s:
+                lst.append(s)
+                s = ''
+        pc,cc = cc,nc
+    else:
+        s = s.strip()
+        if s:
+            lst.append(s)
+    log.debug('splitcmdline -> %r' % (lst))
+    return lst
+
+def test_splitcmdline():
+    l = splitcmdline('a   b  cc')
+    assert l==['a','b','cc'],`l`
+    l = splitcmdline('a')
+    assert l==['a'],`l`
+    l = splitcmdline('a "  b  cc"')
+    assert l==['a','"  b  cc"'],`l`
+    l = splitcmdline('"a bcc"  -h')
+    assert l==['"a bcc"','-h'],`l`
+    l = splitcmdline(r'"\"a \" bcc" -h')
+    assert l==[r'"\"a \" bcc"','-h'],`l`
+    l = splitcmdline(" 'a bcc'  -h")
+    assert l==["'a bcc'",'-h'],`l`
+    l = splitcmdline(r"'\'a \' bcc' -h")
+    assert l==[r"'\'a \' bcc'",'-h'],`l`
+
+############################################################
+
+def find_executable(exe, path=None):
+    """ Return full path of a executable.
+    """
+    log.debug('find_executable(%r)' % exe)
+    orig_exe = exe
+    if path is None:
+        path = os.environ.get('PATH',os.defpath)
+    if os.name=='posix' and sys.version[:3]>'2.1':
+        realpath = os.path.realpath
+    else:
+        realpath = lambda a:a
+    if exe[0]=='"':
+        exe = exe[1:-1]
+    suffices = ['']
+    if os.name in ['nt','dos','os2']:
+        fn,ext = os.path.splitext(exe)
+        extra_suffices = ['.exe','.com','.bat']
+        if ext.lower() not in extra_suffices:
+            suffices = extra_suffices
+    if os.path.isabs(exe):
+        paths = ['']
+    else:
+        paths = map(os.path.abspath, path.split(os.pathsep))
+        if 0 and os.name == 'nt':
+            new_paths = []
+            cygwin_paths = []
+            for path in paths:
+                d,p = os.path.splitdrive(path)
+                if p.lower().find('cygwin') >= 0:
+                    cygwin_paths.append(path)
+                else:
+                    new_paths.append(path)
+            paths = new_paths + cygwin_paths
+    for path in paths:
+        fn = os.path.join(path,exe)
+        for s in suffices:
+            f_ext = fn+s
+            if not os.path.islink(f_ext):
+                # see comment below.
+                f_ext = realpath(f_ext)
+            if os.path.isfile(f_ext) and os.access(f_ext,os.X_OK):
+                log.debug('Found executable %s' % f_ext)
+                return f_ext
+    if os.path.islink(exe):
+        # Don't follow symbolic links. E.g. when using colorgcc then
+        # gcc -> /usr/bin/colorgcc
+        # g77 -> /usr/bin/colorgcc
+        pass
+    else:
+        exe = realpath(exe)
+    if not os.path.isfile(exe) or os.access(exe,os.X_OK):
+        log.warn('Could not locate executable %s' % orig_exe)
+        return orig_exe
+    return exe
+
+############################################################
+
+def _preserve_environment( names ):
+    log.debug('_preserve_environment(%r)' % (names))
+    env = {}
+    for name in names:
+        env[name] = os.environ.get(name)
+    return env
+
+def _update_environment( **env ):
+    log.debug('_update_environment(...)')
+    for name,value in env.items():
+        os.environ[name] = value or ''
+
+def exec_command( command,
+                  execute_in='', use_shell=None, use_tee = None,
+                  _with_python = 1,
+                  **env ):
+    """ Return (status,output) of executed command.
+
+    command is a concatenated string of executable and arguments.
+    The output contains both stdout and stderr messages.
+    The following special keyword arguments can be used:
+      use_shell - execute `sh -c command`
+      use_tee   - pipe the output of command through tee
+      execute_in - before command `cd execute_in` and after `cd -`.
+
+    On NT, DOS systems the returned status is correct for external commands.
+    Wild cards will not work for non-posix systems or when use_shell=0.
+    """
+    log.debug('exec_command(%r,%s)' % (command,\
+         ','.join(['%s=%r'%kv for kv in env.items()])))
+
+    if use_tee is None:
+        use_tee = os.name=='posix'
+    if use_shell is None:
+        use_shell = os.name=='posix'
+    execute_in = os.path.abspath(execute_in)
+    oldcwd = os.path.abspath(os.getcwd())
+
+    if __name__[-12:] == 'exec_command':
+        exec_dir = os.path.dirname(os.path.abspath(__file__))
+    elif os.path.isfile('exec_command.py'):
+        exec_dir = os.path.abspath('.')
+    else:
+        exec_dir = os.path.abspath(sys.argv[0])
+        if os.path.isfile(exec_dir):
+            exec_dir = os.path.dirname(exec_dir)
+
+    if oldcwd!=execute_in:
+        os.chdir(execute_in)
+        log.debug('New cwd: %s' % execute_in)
+    else:
+        log.debug('Retaining cwd: %s' % oldcwd)
+
+    oldenv = _preserve_environment( env.keys() )
+    _update_environment( **env )
+
+    try:
+        # _exec_command is robust but slow, it relies on
+        # usable sys.std*.fileno() descriptors. If they
+        # are bad (like in win32 Idle, PyCrust environments)
+        # then _exec_command_python (even slower)
+        # will be used as a last resort.
+        #
+        # _exec_command_posix uses os.system and is faster
+        # but not on all platforms os.system will return
+        # a correct status.
+        if _with_python and (0 or sys.__stdout__.fileno()==-1):
+            st = _exec_command_python(command,
+                                      exec_command_dir = exec_dir,
+                                      **env)
+        elif os.name=='posix':
+            st = _exec_command_posix(command,
+                                     use_shell=use_shell,
+                                     use_tee=use_tee,
+                                     **env)
+        else:
+            st = _exec_command(command, use_shell=use_shell,
+                               use_tee=use_tee,**env)
+    finally:
+        if oldcwd!=execute_in:
+            os.chdir(oldcwd)
+            log.debug('Restored cwd to %s' % oldcwd)
+        _update_environment(**oldenv)
+
+    return st
+
+def _exec_command_posix( command,
+                         use_shell = None,
+                         use_tee = None,
+                         **env ):
+    log.debug('_exec_command_posix(...)')
+
+    if type(command) is type([]):
+        command_str = ' '.join(command)
+    else:
+        command_str = command
+
+    tmpfile = tempfile.mktemp()
+    stsfile = None
+    if use_tee:
+        stsfile = tempfile.mktemp()
+        filter = ''
+        if use_tee == 2:
+            filter = r'| tr -cd "\n" | tr "\n" "."; echo'
+        command_posix = '( %s ; echo $? > %s ) 2>&1 | tee %s %s'\
+                      % (command_str,stsfile,tmpfile,filter)
+    else:
+        stsfile = tempfile.mktemp()
+        command_posix = '( %s ; echo $? > %s ) > %s 2>&1'\
+                        % (command_str,stsfile,tmpfile)
+        #command_posix = '( %s ) > %s 2>&1' % (command_str,tmpfile)
+
+    log.debug('Running os.system(%r)' % (command_posix))
+    status = os.system(command_posix)
+
+    if use_tee:
+        if status:
+            # if command_tee fails then fall back to robust exec_command
+            log.warn('_exec_command_posix failed (status=%s)' % status)
+            return _exec_command(command, use_shell=use_shell, **env)
+
+    if stsfile is not None:
+        f = open(stsfile,'r')
+        status_text = f.read()
+        status = int(status_text)
+        f.close()
+        os.remove(stsfile)
+
+    f = open(tmpfile,'r')
+    text = f.read()
+    f.close()
+    os.remove(tmpfile)
+
+    if text[-1:]=='\n':
+        text = text[:-1]
+    
+    return status, text
+
+
+def _exec_command_python(command,
+                         exec_command_dir='', **env):
+    log.debug('_exec_command_python(...)')
+
+    python_exe = get_pythonexe()
+    cmdfile = tempfile.mktemp()
+    stsfile = tempfile.mktemp()
+    outfile = tempfile.mktemp()
+
+    f = open(cmdfile,'w')
+    f.write('import os\n')
+    f.write('import sys\n')
+    f.write('sys.path.insert(0,%r)\n' % (exec_command_dir))
+    f.write('from exec_command import exec_command\n')
+    f.write('del sys.path[0]\n')
+    f.write('cmd = %r\n' % command)
+    f.write('os.environ = %r\n' % (os.environ))
+    f.write('s,o = exec_command(cmd, _with_python=0, **%r)\n' % (env))
+    f.write('f=open(%r,"w")\nf.write(str(s))\nf.close()\n' % (stsfile))
+    f.write('f=open(%r,"w")\nf.write(o)\nf.close()\n' % (outfile))
+    f.close()
+
+    cmd = '%s %s' % (python_exe, cmdfile)
+    status = os.system(cmd)
+    assert not status,`cmd`+' failed'
+    os.remove(cmdfile)
+
+    f = open(stsfile,'r')
+    status = int(f.read())
+    f.close()
+    os.remove(stsfile)
+    
+    f = open(outfile,'r')
+    text = f.read()
+    f.close()
+    os.remove(outfile)
+    
+    return status, text
+
+def quote_arg(arg):
+    if arg[0]!='"' and ' ' in arg:
+        return '"%s"' % arg
+    return arg
+
+def _exec_command( command, use_shell=None, use_tee = None, **env ):
+    log.debug('_exec_command(...)')
+    
+    if use_shell is None:
+        use_shell = os.name=='posix'
+    if use_tee is None:
+        use_tee = os.name=='posix'
+
+    using_command = 0
+    if use_shell:
+        # We use shell (unless use_shell==0) so that wildcards can be
+        # used.
+        sh = os.environ.get('SHELL','/bin/sh')
+        if type(command) is type([]):
+            argv = [sh,'-c',' '.join(command)]
+        else:
+            argv = [sh,'-c',command]
+    else:
+        # On NT, DOS we avoid using command.com as it's exit status is
+        # not related to the exit status of a command.
+        if type(command) is type([]):
+            argv = command[:]
+        else:
+            argv = splitcmdline(command)
+
+    if hasattr(os,'spawnvpe'):
+        spawn_command = os.spawnvpe
+    else:
+        spawn_command = os.spawnve
+        argv[0] = find_executable(argv[0])
+        if not os.path.isfile(argv[0]):
+            log.warn('Executable %s does not exist' % (argv[0]))
+            if os.name in ['nt','dos']:
+                # argv[0] might be internal command
+                argv = [os.environ['COMSPEC'],'/C'] + argv
+                using_command = 1
+
+    # sys.__std*__ is used instead of sys.std* because environments
+    # like IDLE, PyCrust, etc overwrite sys.std* commands.
+    so_fileno = sys.__stdout__.fileno()
+    se_fileno = sys.__stderr__.fileno()
+    so_flush = sys.__stdout__.flush
+    se_flush = sys.__stderr__.flush
+    so_dup = os.dup(so_fileno)
+    se_dup = os.dup(se_fileno)
+
+    outfile = tempfile.mktemp()
+    fout = open(outfile,'w')
+    if using_command:
+        errfile = tempfile.mktemp()
+        ferr = open(errfile,'w')
+
+    log.debug('Running %s(%s,%r,%r,os.environ)' \
+              % (spawn_command.__name__,os.P_WAIT,argv[0],argv))
+
+    argv0 = argv[0]
+    if not using_command:
+        argv[0] = quote_arg(argv0)
+
+    so_flush()
+    se_flush()
+    os.dup2(fout.fileno(),so_fileno)
+    if using_command:
+        #XXX: disabled for now as it does not work from cmd under win32.
+        #     Tests fail on msys
+        os.dup2(ferr.fileno(),se_fileno)
+    else:
+        os.dup2(fout.fileno(),se_fileno)
+    try:
+        status = spawn_command(os.P_WAIT,argv0,argv,os.environ)
+    except OSError,errmess:
+        status = 999
+        sys.stderr.write('%s: %s'%(errmess,argv[0]))
+
+    so_flush()
+    se_flush()
+    os.dup2(so_dup,so_fileno)
+    os.dup2(se_dup,se_fileno)
+
+    fout.close()
+    fout = open(outfile,'r')
+    text = fout.read()
+    fout.close()
+    os.remove(outfile)
+
+    if using_command:
+        ferr.close()
+        ferr = open(errfile,'r')
+        errmess = ferr.read()
+        ferr.close()
+        os.remove(errfile)
+        if errmess and not status:
+            # Not sure how to handle the case where errmess
+            # contains only warning messages and that should
+            # not be treated as errors.
+            #status = 998
+            if text:
+                text = text + '\n'
+            #text = '%sCOMMAND %r FAILED: %s' %(text,command,errmess)
+            text = text + errmess
+            print errmess
+    if text[-1:]=='\n':
+        text = text[:-1]
+    if status is None:
+        status = 0
+
+    if use_tee:
+        print text
+
+    return status, text
+
+
+def test_nt(**kws):
+    pythonexe = get_pythonexe()
+    echo = find_executable('echo')
+    using_cygwin_echo = echo != 'echo'
+    if using_cygwin_echo:
+        log.warn('Using cygwin echo in win32 environment is not supported')
+
+        s,o=exec_command(pythonexe\
+                         +' -c "import os;print os.environ.get(\'AAA\',\'\')"')
+        assert s==0 and o=='',(s,o)
+        
+        s,o=exec_command(pythonexe\
+                         +' -c "import os;print os.environ.get(\'AAA\')"',
+                         AAA='Tere')
+        assert s==0 and o=='Tere',(s,o)
+
+        os.environ['BBB'] = 'Hi'
+        s,o=exec_command(pythonexe\
+                         +' -c "import os;print os.environ.get(\'BBB\',\'\')"')
+        assert s==0 and o=='Hi',(s,o)
+
+        s,o=exec_command(pythonexe\
+                         +' -c "import os;print os.environ.get(\'BBB\',\'\')"',
+                         BBB='Hey')
+        assert s==0 and o=='Hey',(s,o)
+
+        s,o=exec_command(pythonexe\
+                         +' -c "import os;print os.environ.get(\'BBB\',\'\')"')
+        assert s==0 and o=='Hi',(s,o)
+    elif 0:
+        s,o=exec_command('echo Hello')
+        assert s==0 and o=='Hello',(s,o)
+
+        s,o=exec_command('echo a%AAA%')
+        assert s==0 and o=='a',(s,o)
+
+        s,o=exec_command('echo a%AAA%',AAA='Tere')
+        assert s==0 and o=='aTere',(s,o)
+
+        os.environ['BBB'] = 'Hi'
+        s,o=exec_command('echo a%BBB%')
+        assert s==0 and o=='aHi',(s,o)
+
+        s,o=exec_command('echo a%BBB%',BBB='Hey')
+        assert s==0 and o=='aHey', (s,o)
+        s,o=exec_command('echo a%BBB%')
+        assert s==0 and o=='aHi',(s,o)
+
+        s,o=exec_command('this_is_not_a_command')
+        assert s and o!='',(s,o)
+
+        s,o=exec_command('type not_existing_file')
+        assert s and o!='',(s,o)
+
+    s,o=exec_command('echo path=%path%')
+    assert s==0 and o!='',(s,o)
+    
+    s,o=exec_command('%s -c "import sys;sys.stderr.write(sys.platform)"' \
+                     % pythonexe)
+    assert s==0 and o=='win32',(s,o)
+
+    s,o=exec_command('%s -c "raise \'Ignore me.\'"' % pythonexe)
+    assert s==1 and o,(s,o)
+
+    s,o=exec_command('%s -c "import sys;sys.stderr.write(\'0\');sys.stderr.write(\'1\');sys.stderr.write(\'2\')"'\
+                     % pythonexe)
+    assert s==0 and o=='012',(s,o)
+
+    s,o=exec_command('%s -c "import sys;sys.exit(15)"' % pythonexe)
+    assert s==15 and o=='',(s,o)
+
+    s,o=exec_command('%s -c "print \'Heipa\'"' % pythonexe)
+    assert s==0 and o=='Heipa',(s,o)
+
+    print 'ok'
+
+def test_posix(**kws):
+    s,o=exec_command("echo Hello",**kws)
+    assert s==0 and o=='Hello',(s,o)
+
+    s,o=exec_command('echo $AAA',**kws)
+    assert s==0 and o=='',(s,o)
+
+    s,o=exec_command('echo "$AAA"',AAA='Tere',**kws)
+    assert s==0 and o=='Tere',(s,o)
+
+
+    s,o=exec_command('echo "$AAA"',**kws)
+    assert s==0 and o=='',(s,o)
+
+    os.environ['BBB'] = 'Hi'
+    s,o=exec_command('echo "$BBB"',**kws)
+    assert s==0 and o=='Hi',(s,o)
+
+    s,o=exec_command('echo "$BBB"',BBB='Hey',**kws)
+    assert s==0 and o=='Hey',(s,o)
+
+    s,o=exec_command('echo "$BBB"',**kws)
+    assert s==0 and o=='Hi',(s,o)
+
+
+    s,o=exec_command('this_is_not_a_command',**kws)
+    assert s!=0 and o!='',(s,o)
+
+    s,o=exec_command('echo path=$PATH',**kws)
+    assert s==0 and o!='',(s,o)
+    
+    s,o=exec_command('python -c "import sys,os;sys.stderr.write(os.name)"',**kws)
+    assert s==0 and o=='posix',(s,o)
+
+    s,o=exec_command('python -c "raise \'Ignore me.\'"',**kws)
+    assert s==1 and o,(s,o)
+
+    s,o=exec_command('python -c "import sys;sys.stderr.write(\'0\');sys.stderr.write(\'1\');sys.stderr.write(\'2\')"',**kws)
+    assert s==0 and o=='012',(s,o)
+
+    s,o=exec_command('python -c "import sys;sys.exit(15)"',**kws)
+    assert s==15 and o=='',(s,o)
+
+    s,o=exec_command('python -c "print \'Heipa\'"',**kws)
+    assert s==0 and o=='Heipa',(s,o)
+    
+    print 'ok'
+
+def test_execute_in(**kws):
+    pythonexe = get_pythonexe()
+    tmpfile = tempfile.mktemp()
+    fn = os.path.basename(tmpfile)
+    tmpdir = os.path.dirname(tmpfile)
+    f = open(tmpfile,'w')
+    f.write('Hello')
+    f.close()
+
+    s,o = exec_command('%s -c "print \'Ignore the following IOError:\','\
+                       'open(%r,\'r\')"' % (pythonexe,fn),**kws)
+    assert s and o!='',(s,o)
+    s,o = exec_command('%s -c "print open(%r,\'r\').read()"' % (pythonexe,fn),
+                       execute_in = tmpdir,**kws)
+    assert s==0 and o=='Hello',(s,o)
+    os.remove(tmpfile)
+    print 'ok'
+
+def test_svn(**kws):
+    s,o = exec_command(['svn','status'],**kws)
+    assert s,(s,o)
+    print 'svn ok'
+
+def test_cl(**kws):
+    if os.name=='nt':
+        s,o = exec_command(['cl','/V'],**kws)
+        assert s,(s,o)
+        print 'cl ok'
+
+if os.name=='posix':
+    test = test_posix
+elif os.name in ['nt','dos']:
+    test = test_nt
+else:
+    raise NotImplementedError,'exec_command tests for '+os.name
+
+############################################################
+
+if __name__ == "__main__":
+
+    test_splitcmdline()
+    test(use_tee=0)
+    test(use_tee=1)
+    test_execute_in(use_tee=0)
+    test_execute_in(use_tee=1)
+    test_svn(use_tee=1)
+    test_cl(use_tee=1)