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setup: replace runhg() with an hgcommand helper class
authorAdam Simpkins <simpkins@fb.com>
Tue, 27 Jun 2017 16:15:32 -0700
changeset 33113 fc290a39590d
parent 33112 155d760da7b2
child 33114 8b20338b989e
setup: replace runhg() with an hgcommand helper class Replace the runhg() function with an hgcommand helper class. hgcommand has as run() function similar to runhg(), but no longer requires the caller to pass in the exact path to python and the hg script, and the environment settings for invoking hg. For now this diff contains no behavior changes, but in the future this will make it easier for the hgcommand helper class to more intelligently figure out the proper way to invoke hg.
setup.py file | annotate | diff | comparison | revisions 
--- a/setup.py	Mon Jun 26 11:31:30 2017 -0700
+++ b/setup.py	Tue Jun 27 16:15:32 2017 -0700
@@ -148,23 +148,28 @@
     out, err = p.communicate()
     return p.returncode, out, err
 
-def runhg(cmd, env):
-    returncode, out, err = runcmd(cmd, env)
-    # If root is executing setup.py, but the repository is owned by
-    # another user (as in "sudo python setup.py install") we will get
-    # trust warnings since the .hg/hgrc file is untrusted. That is
-    # fine, we don't want to load it anyway.  Python may warn about
-    # a missing __init__.py in mercurial/locale, we also ignore that.
-    err = [e for e in err.splitlines()
-           if not e.startswith(b'not trusting file') \
-              and not e.startswith(b'warning: Not importing') \
-              and not e.startswith(b'obsolete feature not enabled')]
-    if err or returncode != 0:
-        printf("stderr from '%s':" % (' '.join(cmd)), file=sys.stderr)
-        printf(b'\n'.join([b'  ' + e for e in err]), file=sys.stderr)
-        return ''
-    return out
+class hgcommand(object):
+    def __init__(self):
+        self.cmd = [sys.executable, 'hg']
+        self.env = gethgenv()
 
+    def run(self, args):
+        cmd = self.cmd + args
+        returncode, out, err = runcmd(cmd, self.env)
+        # If root is executing setup.py, but the repository is owned by
+        # another user (as in "sudo python setup.py install") we will get
+        # trust warnings since the .hg/hgrc file is untrusted. That is
+        # fine, we don't want to load it anyway.  Python may warn about
+        # a missing __init__.py in mercurial/locale, we also ignore that.
+        err = [e for e in err.splitlines()
+               if not e.startswith(b'not trusting file') \
+                  and not e.startswith(b'warning: Not importing') \
+                  and not e.startswith(b'obsolete feature not enabled')]
+        if err or returncode != 0:
+            printf("stderr from '%s':" % (' '.join(cmd)), file=sys.stderr)
+            printf(b'\n'.join([b'  ' + e for e in err]), file=sys.stderr)
+            return ''
+        return out
 
 def gethgenv():
     # Execute hg out of this directory with a custom environment which takes
@@ -180,13 +185,13 @@
         # https://bugs.python.org/issue13524#msg148850
         env['SystemRoot'] = os.environ['SystemRoot']
 
-env = gethgenv()
 version = ''
 
 if os.path.isdir('.hg'):
-    cmd = [sys.executable, 'hg', 'log', '-r', '.', '--template', '{tags}\n']
-    numerictags = [t for t in runhg(cmd, env).split() if t[0:1].isdigit()]
-    hgid = runhg([sys.executable, 'hg', 'id', '-i'], env).strip()
+    hg = hgcommand()
+    cmd = ['log', '-r', '.', '--template', '{tags}\n']
+    numerictags = [t for t in hg.run(cmd).split() if t[0:1].isdigit()]
+    hgid = hg.run(['id', '-i']).strip()
     if not hgid:
         # Bail out if hg is having problems interacting with this repository,
         # rather than falling through and producing a bogus version number.
@@ -198,12 +203,10 @@
         if hgid.endswith('+'): # propagate the dirty status to the tag
             version += '+'
     else: # no tag found
-        ltagcmd = [sys.executable, 'hg', 'parents', '--template',
-                   '{latesttag}']
-        ltag = runhg(ltagcmd, env)
-        changessincecmd = [sys.executable, 'hg', 'log', '-T', 'x\n', '-r',
-                           "only(.,'%s')" % ltag]
-        changessince = len(runhg(changessincecmd, env).splitlines())
+        ltagcmd = ['parents', '--template', '{latesttag}']
+        ltag = hg.run(ltagcmd)
+        changessincecmd = ['log', '-T', 'x\n', '-r', "only(.,'%s')" % ltag]
+        changessince = len(hg.run(changessincecmd).splitlines())
         version = '%s+%s-%s' % (ltag, changessince, hgid)
     if version.endswith('+'):
         version += time.strftime('%Y%m%d')
@@ -407,7 +410,7 @@
         # here no extension enabled, disabled() lists up everything
         code = ('import pprint; from mercurial import extensions; '
                 'pprint.pprint(extensions.disabled())')
-        returncode, out, err = runcmd([sys.executable, '-c', code], env)
+        returncode, out, err = runcmd([sys.executable, '-c', code], gethgenv())
         if err or returncode != 0:
             raise DistutilsExecError(err)
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