Provided by: reposurgeon_3.29-1_amd64 
NAME
repodiffer - report differences between repository histories
SYNOPSIS
repodiffer [--ignore parts] [--quiet] [--verbose level] [--show-equal] [--changes-only] [--full-hash]
[--tree-diff] [--legacy-map mapfile] [--single id1=id2] repo-or-stream1 repo-or-stream2
DESCRIPTION
This tool reports differences between two repository histories. The histories may be presented as git
repository directories or as fast-import streams, or as one of each.
Revisions are first paired into correspondence by committer and commit date. Any revision in the
left-hand (L) history that cannot be paired with a revision in the right-hand (R) history is interpreted
as having been deleted; any revision in the R history that cannot be paired with a revision in the L
history is interpreted as having been inserted.
For each changed, inserted, or deleted revision, a summary line is emitted identifying it by commit ID
(for a repo) or mark (for a stream file) in the first history. In change reports, the corresponding
revision in the second history is similarly identified and the report indicates the nature of the
changes.
A trailing statistics line summarizes the operation counts.
Tags and heads are compared as well. Two tags match if their contents do and they point at paired
commits.
OPTIONS
The --changes-only or -c option shows changes only, suppressing listing of insertions and deletions.
The --show-equal or -e option enables listing of equal commits.
The --legacy-map or -m option takes a legacy map file in the format produced by reposurgeon, associating
legacy commit IDs with committer/time pairs. If the tool can find a matching committer/time pair for a
commit in this file, reports on this commit (and any matched pair it is part of) will be decorated with
the legacy ID of the commit. (This will work, in particular, for displaying Subversion revisions of
commits lifted from a Subversion file.)
The --single or -s option compares single commits in detail. The argument must be a pair of commit IDs
(marks or hashes) separated by an equals sign.
The --ignore or -i option causes differences between specified parts to be ignored. Part tags are as
follows:
author
Ignore differences in the (name part of the) author field.
authordate
Ignore differences in the author date part.
committer
Ignore differences in the (name part of the) committer field.
committerdate
Ignore differences in the commit date part
parents
Ignore differences in parent links.
timezone
Apply a modulo 360 operation to timestamps before comparison, so as to ignore time-zone skew.
tree
Ignore tree-content differences. (It is not expected that this option will be useful; it is provided
for completeness's sake.)
gitignore
Ignore .gitignore and .cvsignore files when comparing tree content. Useful if you are comparing
translations done by pairs of lifting tools only one of which lifts these; a notable case of this is
reposurgeon vs. git-svn.
email
Ignore email addresses when comparing names. This can be useful when comparing two repositories
translated from Subversion; typically they'll have the Subversion Unix user ID as the name part of
the address, but whether and how a host part is generated for the address varies.
One of these or a comma-separated list of several can be specified.
The --fullhash or -f option forces reporting of full 40-digit hash IDs, rather than the normal short
hash.
Normally only the names of differing files are listed. With the --tree-diff option, context diffs of the
files are listed.
The --quiet or -q option suppresses the progress meter.
The --verbose or -v option enables debugging messages that are probably only of interest to developers;
consult the source code for details.
RETURN VALUES
For scripting use, this program returns 0 unless content (tree) differences were found in matching
commits, in which case it returns 1. Right-side-only or left-side-only commits do not cause a return of
1, nor do differences in change comments only.
AUTHOR
Eric S. Raymond <esr@thyrsus.com>. This tool is distributed with reposurgeon; see the project page at http://www.catb.org/~esr/reposurgeon.