Remove precmd from backend_ps and use subprocess

tomspur · tomspur · commit 1140314df77d · 2017-04-03T22:09:59.000+02:00
diff --git a/lib/matplotlib/backends/backend_ps.py b/lib/matplotlib/backends/backend_ps.py
@@ -1458,19 +1458,16 @@ def convert_psfrags(tmpfile, psfrags, font_preamble, custom_preamble,
                                "rcParam.", 'helpful')
                 raise
 
-    # the split drive part of the command is necessary for windows users with
-    # multiple
-    if sys.platform == 'win32': precmd = '%s &&'% os.path.splitdrive(tmpdir)[0]
-    else: precmd = ''
     #Replace \\ for / so latex does not think there is a function call
     latexfile = latexfile.replace("\\", "/")
     # Replace ~ so Latex does not think it is line break
     latexfile = latexfile.replace("~", "\\string~")
     command = [str('latex'), '-interction=nonstopmode', '"%s"' % (latexfile)]
     verbose.report(command, 'debug')
     try:
-        output = subprocess.check_output(command, shell=True,
-                                         stderr=subprocess.STDOUT)
+        with open(outfile, "w") as fout:
+            subprocess.check_call(command, cwd=tmpdir,
+                                  stdout=fout, stderr=subprocess.STDOUT)
     except subprocess.CalledProcessError as exc:
         with io.open(outfile, 'rb') as fh:
             raise RuntimeError('LaTeX was not able to process your file: '
@@ -1481,12 +1478,13 @@ def convert_psfrags(tmpfile, psfrags, font_preamble, custom_preamble,
             verbose.report(fh.read(), 'debug')
     os.remove(outfile)
 
-    command = '%s cd "%s" && dvips -q -R0 -o "%s" "%s" > "%s"'%(precmd, tmpdir,
-                os.path.split(psfile)[-1], os.path.split(dvifile)[-1], outfile)
+    command = ['dvips', '-q', '-R0', '-o', '"%s"' % os.path.basename(psfile),
+               '"%s"' % os.path.basename(dvifile)]
     verbose.report(command, 'debug')
     try:
-        output = subprocess.check_output(command, shell=True,
-                                         stderr=subprocess.STDOUT)
+        with open(outfile, "w") as fout:
+            subprocess.check_call(command, cwd=tmpdir,
+                                    stdout=fout, stderr=subprocess.STDOUT)
     except subprocess.CalledProcessError as exc:
         with io.open(outfile, 'rb') as fh:
             raise RuntimeError('dvips was not able to process the following '
