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find_commits_touching_func.py
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find_commits_touching_func.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# copryright 2013, y-p @ github
from __future__ import print_function
"""Search the git history for all commits touching a named method
You need the sh module to run this
WARNING: this script uses git clean -f, running it on a repo with untracked files
will probably erase them.
"""
import logging
import re
import os
from collections import namedtuple
from dateutil import parser
try:
import sh
except ImportError:
raise ImportError("The 'sh' package is required in order to run this script. ")
import argparse
desc = """
Find all commits touching a sepcified function across the codebase.
""".strip()
argparser = argparse.ArgumentParser(description=desc)
argparser.add_argument('funcname', metavar='FUNCNAME',
help='Name of function/method to search for changes on.')
argparser.add_argument('-f', '--file-masks', metavar='f_re(,f_re)*',
default=["\.py.?$"],
help='comma seperated list of regexes to match filenames against\n'+
'defaults all .py? files')
argparser.add_argument('-d', '--dir-masks', metavar='d_re(,d_re)*',
default=[],
help='comma seperated list of regexes to match base path against')
argparser.add_argument('-p', '--path-masks', metavar='p_re(,p_re)*',
default=[],
help='comma seperated list of regexes to match full file path against')
argparser.add_argument('-y', '--saw-the-warning',
action='store_true',default=False,
help='must specify this to run, acknowledge you realize this will erase untracked files')
argparser.add_argument('--debug-level',
default="CRITICAL",
help='debug level of messages (DEBUG,INFO,etc...)')
args = argparser.parse_args()
lfmt = logging.Formatter(fmt='%(levelname)-8s %(message)s',
datefmt='%m-%d %H:%M:%S'
)
shh = logging.StreamHandler()
shh.setFormatter(lfmt)
logger=logging.getLogger("findit")
logger.addHandler(shh)
Hit=namedtuple("Hit","commit path")
HASH_LEN=8
def clean_checkout(comm):
h,s,d = get_commit_vitals(comm)
if len(s) > 60:
s = s[:60] + "..."
s=s.split("\n")[0]
logger.info("CO: %s %s" % (comm,s ))
sh.git('checkout', comm ,_tty_out=False)
sh.git('clean', '-f')
def get_hits(defname,files=()):
cs=set()
for f in files:
try:
r=sh.git('blame', '-L', '/def\s*{start}/,/def/'.format(start=defname),f,_tty_out=False)
except sh.ErrorReturnCode_128:
logger.debug("no matches in %s" % f)
continue
lines = r.strip().splitlines()[:-1]
# remove comment lines
lines = [x for x in lines if not re.search("^\w+\s*\(.+\)\s*#",x)]
hits = set(map(lambda x: x.split(" ")[0],lines))
cs.update(set([Hit(commit=c,path=f) for c in hits]))
return cs
def get_commit_info(c,fmt,sep='\t'):
r=sh.git('log', "--format={}".format(fmt), '{}^..{}'.format(c,c),"-n","1",_tty_out=False)
return unicode(r).split(sep)
def get_commit_vitals(c,hlen=HASH_LEN):
h,s,d= get_commit_info(c,'%H\t%s\t%ci',"\t")
return h[:hlen],s,parser.parse(d)
def file_filter(state,dirname,fnames):
if args.dir_masks and not any([re.search(x,dirname) for x in args.dir_masks]):
return
for f in fnames:
p = os.path.abspath(os.path.join(os.path.realpath(dirname),f))
if any([re.search(x,f) for x in args.file_masks])\
or any([re.search(x,p) for x in args.path_masks]):
if os.path.isfile(p):
state['files'].append(p)
def search(defname,head_commit="HEAD"):
HEAD,s = get_commit_vitals("HEAD")[:2]
logger.info("HEAD at %s: %s" % (HEAD,s))
done_commits = set()
# allhits = set()
files = []
state = dict(files=files)
os.path.walk('.',file_filter,state)
# files now holds a list of paths to files
# seed with hits from q
allhits= set(get_hits(defname, files = files))
q = set([HEAD])
try:
while q:
h=q.pop()
clean_checkout(h)
hits = get_hits(defname, files = files)
for x in hits:
prevc = get_commit_vitals(x.commit+"^")[0]
if prevc not in done_commits:
q.add(prevc)
allhits.update(hits)
done_commits.add(h)
logger.debug("Remaining: %s" % q)
finally:
logger.info("Restoring HEAD to %s" % HEAD)
clean_checkout(HEAD)
return allhits
def pprint_hits(hits):
SUBJ_LEN=50
PATH_LEN = 20
hits=list(hits)
max_p = 0
for hit in hits:
p=hit.path.split(os.path.realpath(os.curdir)+os.path.sep)[-1]
max_p=max(max_p,len(p))
if max_p < PATH_LEN:
SUBJ_LEN += PATH_LEN - max_p
PATH_LEN = max_p
def sorter(i):
h,s,d=get_commit_vitals(hits[i].commit)
return hits[i].path,d
print("\nThese commits touched the %s method in these files on these dates:\n" \
% args.funcname)
for i in sorted(range(len(hits)),key=sorter):
hit = hits[i]
h,s,d=get_commit_vitals(hit.commit)
p=hit.path.split(os.path.realpath(os.curdir)+os.path.sep)[-1]
fmt = "{:%d} {:10} {:<%d} {:<%d}" % (HASH_LEN, SUBJ_LEN, PATH_LEN)
if len(s) > SUBJ_LEN:
s = s[:SUBJ_LEN-5] + " ..."
print(fmt.format(h[:HASH_LEN],d.isoformat()[:10],s,p[-20:]) )
print("\n")
def main():
if not args.saw_the_warning:
argparser.print_help()
print("""
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
WARNING: this script uses git clean -f, running it on a repo with untracked files.
It's recommended that you make a fresh clone and run from it's root directory.
You must specify the -y argument to ignore this warning.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
""")
return
if isinstance(args.file_masks,basestring):
args.file_masks = args.file_masks.split(',')
if isinstance(args.path_masks,basestring):
args.path_masks = args.path_masks.split(',')
if isinstance(args.dir_masks,basestring):
args.dir_masks = args.dir_masks.split(',')
logger.setLevel(getattr(logging,args.debug_level))
hits=search(args.funcname)
pprint_hits(hits)
pass
if __name__ == "__main__":
import sys
sys.exit(main())