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+#!/usr/bin/env python
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+
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+from __future__ import print_function
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+
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+import io
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+import os
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+import re
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+import sys
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+import time
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+
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+def P(path):
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+ """
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+ Give 'path' as a path relative to the abs_top_srcdir environment
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+ variable.
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+ """
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+ return os.path.join(
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+ os.environ.get('abs_top_srcdir', "."),
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+ path)
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+
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+def warn(msg):
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+ """
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+ Print an warning message.
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+ """
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+ print("WARNING: {}".format(msg), file=sys.stderr)
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+
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+def find_version(infile):
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+ """
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+ Given an open file (or some other iterator of lines) holding a
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+ configure.ac file, find the current version line.
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+ """
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+ for line in infile:
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+ m = re.search(r'AC_INIT\(\[tor\],\s*\[([^\]]*)\]\)', line)
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+ if m:
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+ return m.group(1)
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+
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+ return None
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+
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+def update_version_in(infile, outfile, regex, versionline):
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+ """
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+ Copy every line from infile to outfile. If any line matches 'regex',
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+ replace it with 'versionline'. Return True if any line was changed;
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+ false otherwise.
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+
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+ 'versionline' is either a string -- in which case it is used literally,
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+ or a function that receives the output of 'regex.match'.
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+ """
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+ found = False
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+ have_changed = False
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+ for line in infile:
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+ m = regex.match(line)
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+ if m:
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+ found = True
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+ oldline = line
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+ if type(versionline) == type(u""):
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+ line = versionline
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+ else:
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+ line = versionline(m)
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+ if not line.endswith("\n"):
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+ line += "\n"
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+ if oldline != line:
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+ have_changed = True
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+ outfile.write(line)
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+
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+ if not found:
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+ warn("didn't find any version line to replace in {}".format(infile.name))
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+
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+ return have_changed
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+
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+def replace_on_change(fname, change):
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+ """
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+ If "change" is true, replace fname with fname.tmp. Otherwise,
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+ delete fname.tmp. Log what we're doing to stderr.
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+ """
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+ if not change:
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+ print("No change in {}".format(fname))
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+ os.unlink(fname+".tmp")
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+ else:
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+ print("Updating {}".format(fname))
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+ os.rename(fname+".tmp", fname)
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+
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+
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+def update_file(fname,
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+ regex,
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+ versionline,
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+ encoding="utf-8"):
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+ """
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+ Replace any line matching 'regex' in 'fname' with 'versionline'.
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+ Do not modify 'fname' if there are no changes made. Use the
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+ provided encoding to read and write.
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+ """
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+ with io.open(fname, "r", encoding=encoding) as f, \
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+ io.open(fname+".tmp", "w", encoding=encoding) as outf:
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+ have_changed = update_version_in(f, outf, regex, versionline)
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+
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+ replace_on_change(fname, have_changed)
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+
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+# Find out our version
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+with open("configure.ac") as f:
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+ version = find_version(f)
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+
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+# If we have no version, we can't proceed.
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+if version == None:
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+ print("No version found in configure.ac", file=sys.stderr())
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+ sys.exit(1)
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+
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+print("The version is {}".format(version))
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+
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+today = time.strftime("%Y-%m-%d", time.gmtime())
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+
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+# In configure.ac, we replace the definition of APPROX_RELEASE_DATE
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+# with "{today} for {version}", but only if the version does not match
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+# what is already there.
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+def replace_fn(m):
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+ if m.group(1) != version:
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+ # The version changed -- we change the date.
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+ return u'AC_DEFINE(APPROX_RELEASE_DATE, ["{}"], # for {}'.format(today, version)
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+ else:
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+ # No changes.
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+ return m.group(0)
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+update_file(P("configure.ac"),
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+ re.compile(r'AC_DEFINE\(APPROX_RELEASE_DATE.* for (.*)'),
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+ replace_fn)
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+
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+# In tor-mingw.nsi.in, we replace the definition of VERSION.
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+update_file(P("contrib/win32build/tor-mingw.nsi.in"),
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+ re.compile(r'!define VERSION .*'),
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+ u'!define VERSION "{}"'.format(version),
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+ encoding="iso-8859-1")
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+
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+# In src/win32/orconfig.h, we replace the definition of VERSION.
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+update_file(P("src/win32/orconfig.h"),
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+ re.compile(r'#define VERSION .*'),
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+ u'#define VERSION "{}"'.format(version))
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Nick Mathewson