Add a utility script:
Greps and returns the first svn log entry containing a line matching the regular
expression pattern passed as the only arg.
Example:
svn log -v | grep-svn-log.py '^ D.+why_are_you_missing.h$'
git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@143671 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/misc/grep-svn-log.py b/utils/misc/grep-svn-log.py
new file mode 100755
index 0000000..a29df3f
--- /dev/null
+++ b/utils/misc/grep-svn-log.py
@@ -0,0 +1,83 @@
+#!/usr/bin/env python
+
+"""
+Greps and returns the first svn log entry containing a line matching the regular
+expression pattern passed as the only arg.
+
+Example:
+
+svn log -v | grep-svn-log.py '^ D.+why_are_you_missing.h$'
+"""
+
+import fileinput, re, sys, StringIO
+
+# Separator string for "svn log -v" output.
+separator = '-' * 72
+
+usage = """Usage: grep-svn-log.py line-pattern
+Example:
+ svn log -v | grep-svn-log.py '^ D.+why_are_you_missing.h'"""
+
+class Log(StringIO.StringIO):
+ """Simple facade to keep track of the log content."""
+ def __init__(self):
+ self.reset()
+ def add_line(self, a_line):
+ """Add a line to the content, if there is a previous line, commit it."""
+ global separator
+ if self.prev_line != None:
+ print >> self, self.prev_line
+ self.prev_line = a_line
+ self.separator_added = (a_line == separator)
+ def del_line(self):
+ """Forget about the previous line, do not commit it."""
+ self.prev_line = None
+ def reset(self):
+ """Forget about the previous lines entered."""
+ StringIO.StringIO.__init__(self)
+ self.prev_line = None
+ def finish(self):
+ """Call this when you're finished with populating content."""
+ if self.prev_line != None:
+ print >> self, self.prev_line
+ self.prev_line = None
+
+def grep(regexp):
+ # The log content to be written out once a match is found.
+ log = Log()
+
+ LOOKING_FOR_MATCH = 0
+ FOUND_LINE_MATCH = 1
+ state = LOOKING_FOR_MATCH
+
+ while 1:
+ line = sys.stdin.readline()
+ if not line:
+ return
+ line = line.splitlines()[0]
+ if state == FOUND_LINE_MATCH:
+ # At this state, we keep on accumulating lines until the separator
+ # is encountered. At which point, we can return the log content.
+ if line == separator:
+ print log.getvalue()
+ return
+ log.add_line(line)
+
+ elif state == LOOKING_FOR_MATCH:
+ if line == separator:
+ log.reset()
+ log.add_line(line)
+ # Update next state if necessary.
+ if regexp.search(line):
+ state = FOUND_LINE_MATCH
+
+def main():
+ if len(sys.argv) != 2:
+ print usage
+ sys.exit(0)
+
+ regexp = re.compile(sys.argv[1])
+ grep(regexp)
+
+if __name__ == '__main__':
+ main()