diffstat
make histogram from diff-output
see also :
diff
Synopsis
diffstat
[options] [file-specifications]
add an example, a script, a trick and tips
examples
diffstat can take any file or folder, compressed file(zip,tar ...) with relative option -c ,-h ,-e
... and give historical data output .
for Example my file is
xxxxxx.tar .
The output of this command same thing like this .
--------------------------------------------------------------
$ diffstat -c XXXXXXXXX.tar.gz .
/ | 739 ++----
Warning |
6860 +++++++++++++++++----------------------------------------!!!!!!
FIXME | 1003 +++------
3 files changed, 2468 insertions(+), 5388
deletions(-), 746 modifications(!)
example added by an anonymous user
description
This program
reads the output of diff and displays a histogram of
the insertions, deletions, and modifications per-file.
Diffstat is a program that is useful for reviewing large,
complex patch files. It reads from one or more input files
which contain output from diff, producing a histogram
of the total lines changed for each file referenced.
If the input
filename ends with .bz2, .gz, .lzma, .z or .Z, diffstat will
read the uncompressed data via a pipe from the corresponding
program. It also can infer the compression type from files
piped via the standard input.
Diffstat
recognizes the most popular types of output from diff:
unified
preferred by the patch
utility.
context
best for readability, but not
very compact.
default
not good for much, but simple
to generate.
Diffstat
detects the lines that are output by diff to tell
which files are compared, and then counts the markers in the
first column that denote the type of change (insertion,
deletion or modification). These are shown in the histogram
as "+", "-" and "!"
characters.
If no filename
is given on the command line, diffstat reads the
differences from the standard input.
options
-b
ignore lines matching
"Binary files XXX and YYY differ" in the diff
-c
prefix each line of output with "#", making it
a comment-line for shell scripts.
-C
add SGR color escape sequences to highlight the
histogram.
-D
destination
specify a directory containing
files which can be referred to as the result of applying the
differences. diffstat will count the lines in the
corresponding files (after adjusting the names by the
-p option) to obtain the total number of lines
in each file.
The remainder,
after subtracting modified and deleted lines, is shown as
"unchanged lines".
-e file
redirect standard error to
file.
-f
format
specify the format of the
histogram.
0
for concise, which shows only the value and a single
histogram code for each of insert (+), delete (-) or
modify (!)
1
for normal output,
2
to fill in the histogram with dots,
4
to print each value with the histogram.
Any nonzero
value gives a histogram. The dots and individual values can
be combined, e.g., -f6 gives both.
-h
prints the usage message and
exits.
-k
suppress the merging of filenames in the report.
-l
lists only the filenames. No histogram is generated.
-m
merge insert/delete counts from each "chunk"
of the patch file to approximate a count of the modified
lines.
-n
number
specify the minimum width used
for filenames. If you do not specify this, diffstat
uses the length of the longest filename, after stripping
common prefixes.
-N
number
specify the maximum width used
for filenames. Names longer than this limit are truncated on
the left. If you do not specify this, diffstat next
checks the -n option.
-o file
redirect standard output to
file.
-p
number
override the logic that strips
common pathnames, simulating the patch
"-p" option.
-q
suppress the "0 files changed" message for
empty diffs.
-r code
provides optional rounding of
the data shown in histogram, rather than truncating with
error adjustments.
0
is the default. No rounding is performed, but
accumulated errors are added to following columns.
1
rounds the data
2
rounds the data and adjusts the histogram to ensure that
it displays something if there are any differences even if
those would normally be rounded to zero.
-R
Assume patch
was created with old and new files swapped.
-s
show only the summary line,
e.g., number of insertions and deletions.
-S
source
this is like the
-D option, but specifies a location where the
original files (before applying differences) can be
found.
-t
overrides the histogram, generates output of comma
separated values.
-u
suppress the sorting of filenames in the report.
-v
show progress, e.g., if the output is redirected to a
file, write progress messages to the standard error.
-V
prints the current version number and exits.
-w
number
specify the maximum width of
the histogram. The histogram will never be shorter than 10
columns, just in case the filenames get too large.
environment
Diffstat runs in a portable UNIX® environment.
You can override the compiled-in paths of programs used for
decompressing input files by setting environment variables
corresponding to their name:
DIFFSTAT_BZCAT_PATH
DIFFSTAT_BZIP2_PATH
DIFFSTAT_COMPRESS_PATH
DIFFSTAT_GZIP_PATH
DIFFSTAT_LZCAT_PATH
DIFFSTAT_PCAT_PATH
DIFFSTAT_UNCOMPRESS_PATH
DIFFSTAT_XZ_PATH
DIFFSTAT_ZCAT_PATH
However, diffstat assumes that the resulting program uses
the same command-line options, e.g., "-c" to decompress to the
standard output.
files
Diffstat is a single binary module, which uses no
auxiliary files.
bugs
Diffstat
makes a lot of assumptions about the format of a diff
file.
There is no way
to obtain a filename from the standard diff between two
files with no options. Context diffs work, as well as
unified diffs.
There’s
no easy way to determine the degree of overlap between the
"before" and "after" displays of
modified lines. diffstat simply counts the number of
inserted and deleted lines to approximate modified lines for
the -m option.
see also
diff .
author
Thomas Dickey
<dickey@invisible-island.net>.