Python wants filenames with underscores instead of hyphens and with a
.py extension. We really want the main file named git-filter-repo, but
we can add a git_filter_repo.py symlink. Doing so dramatically
simplifies the steps needed to import it as a library in external python
scripts.
Signed-off-by: Elijah Newren <newren@gmail.com>
Most filtering operations are not interested in the time that commits
were authored or committed, or when tags were tagged. As such,
translating the string representation of the date into a datetime object
is wasted effort, and causes us to waste more time later as we have to
translate it back into a string.
Instead, provide string_to_date() and date_to_string() functions so that
callers can perform the translation if wanted, and let the normal case
be fast.
Provides a small but noticable speedup when just filtering based on
paths; about a 3.5% improvement in execution time for writing the new
history.
Signed-off-by: Elijah Newren <newren@gmail.com>
Make it easy for users to search and replace text throughout the
repository history. Instead of inventing some new syntax, reuse the
same syntax used by BFG repo filter's --replace-text option, namely,
a file with one expression per line of the form
[regex:|glob:|literal:]$MATCH_EXPR[==>$REPLACEMENT_EXPR]
Where "$MATCH_EXPR" is by default considered to be literal text, but
could be a regex or a glob if the appropriate prefix is used. Also,
$REPLACEMENT_EXPR defaults to '***REMOVED***' if not specified. If
you want a literal '==>' to be part of your $MATCH_EXPR, then you
must also manually specify a replacement expression instead of taking
the default. Some examples:
sup3rs3kr3t
(replaces 'sup3rs3kr3t' with '***REMOVED***')
HeWhoShallNotBeNamed==>Voldemort
(replaces 'HeWhoShallNotBeNamed' with 'Voldemort')
very==>
(replaces 'very' with the empty string)
regex:(\d{2})/(\d{2})/(\d{4})==>\2/\1/\3
(replaces '05/17/2012' with '17/05/2012', and vice-versa)
The format for regex is as from
re.sub(<pattern>, <repl>, <string>) from
https://docs.python.org/2/library/re.html
The <string> comes from file contents of the repo, and you specify
the <pattern> and <repl>.
glob:Copy*t==>Cartel
(replaces 'Copyright' or 'Copyleft' or 'Copy my st' with 'Cartel')
Signed-off-by: Elijah Newren <newren@gmail.com>
