cloc - Count, and compute differences of, lines of source code and comments.
cloc [options] <FILE|DIR> ...
Count, or compute differences of, physical lines of source code in the given
files (may be archives such as compressed tarballs or zip files) and/or
recursively below the given directories. It is written entirely in Perl, using
only modules from the standard distribution.
To count standard input, use the special filename -
to tell cloc the name of the file being piped in, or
to apply the LANG counter to all input.
- This option is only needed if cloc is unable to figure out
how to extract the contents of the input file(s) by itself. Use CMD to
extract binary archive files (e.g.: .tar.gz, .zip, .Z). Use the literal
'>FILE<' as a stand-in for the actual file(s) to be extracted. For
example, to count lines of code in the input files gcc-4.2.tar.gz
perl-5.8.8.tar.gz on Unix use:
--extract-with='gzip -dc >FILE< | tar xf -
or, if you have GNU tar:
--extract-with='tar zxf >FILE<'
and on Windows, use, for example:
--extract-with="\"c:\Program Files\WinZip\WinZip32.exe\" -e -o >FILE<
- Take the list of file and/or directory names to process
from FILE, which has one file/directory name per line. Only exact matches
are counted; relative path names will be resolved starting from the
directory where cloc is invoked. See also --exclude-list-file
- Invoke a system call to VCS to obtain a list of files to
work on. If VCS is 'git', then will invoke 'git ls-files'. If VCS is 'svn'
then will invoke 'svn list -R'. The primary benefit is that cloc will then
skip files explicitly excluded by the versioning tool in question, ie,
those in .gitignore or have the svn:ignore property. Alternatively VCS may
be any system command that generates a list of files. Note: cloc must be
in a directory which can read the files as they are returned by VCS. cloc
will not download files from remote repositories. 'svn list -R' may refer
to a remote repository to obtain file names (and therefore may require
authentication to the remote repository), but the files themselves must be
- Check binary files to see if they contain Unicode expanded
ASCII text. This causes performance to drop noticeably.
- Count .in files (as processed by GNU autoconf) of
- Report results for every source file encountered.
- Report results for every source file encountered in
addition to reporting by language.
- --count-and-diff SET1 SET2
- First perform direct code counts of source file(s) of SET1
and SET2 separately, then perform a diff of these. Inputs may be pairs of
files, directories, or archives. See also --diff,
--diff-alignment, --diff-timeout, --ignore-case,
- --diff SET1 SET2
- Compute differences in code and comments between source
file(s) of SET1 and SET2. The inputs may be pairs of files, directories,
or archives. Use --diff-alignment to generate a list showing which
file pairs where compared. See also --count-and-diff,
--diff-alignment, --diff-timeout, --ignore-case,
- --diff-timeout N
- Ignore files which take more than N seconds to process.
Default is 10 seconds. (Large files with many repeated lines can cause
Algorithm::Diff::sdiff() to take hours.)
- [Unix only] Follow symbolic links to directories (sym links
to files are always followed).
- Process all files that have a EXT extension with the
counter for language LANG. For example, to count all .f files with the
Fortran 90 counter (which expects files to end with .f90) instead of the
default Fortran 77 counter, use:
If EXT is omitted, every file will be counted with the LANG counter. This
option can be specified multiple times (but that is only useful when EXT
is given each time). See also --script-lang,
- Load language processing filters from FILE, then use these
filters instead of the built-in filters. Note: languages which map to the
same file extension (for example: MATLAB/Objective C/MUMPS; Pascal/PHP;
Lisp/OpenCL; Lisp/Julia; Perl/Prolog) will be ignored as these require
additional processing that is not expressed in language definition files.
Use --read-lang-def to define new language filters without
replacing built-in filters (see also --write-lang-def).
- Ignore horizontal white space when comparing files with
--diff. See also --ignore-case.
- Ignore changes in case; consider upper- and lowercase
letters equivalent when comparing files with --diff. See also
- Count files without extensions using the LANG counter. This
option overrides internal logic for files without extensions (where such
files are checked against known scripting languages by examining the first
line for "#!"). See also --force-lang,
- Skip files larger than "MB" megabytes when
traversing directories. By default, "MB"=100. cloc's memory
requirement is roughly twenty times larger than the largest file so
running with files larger than 100 MB on a computer with less than 2 GB of
memory will cause problems. Note: this check does not apply to files
explicitly passed as command line arguments.
- Process binary files in addition to text files. This is
usually a bad idea and should only be attempted with text files that have
embedded binary data.
- Load new language processing filters from FILE and merge
them with those already known to cloc. If FILE defines a language cloc
already knows about, cloc's definition will take precedence. Use
--force-lang-def to over-ride cloc's definitions. (see also
- Process all files that invoke "S" as a
"#!" scripting language with the counter for language LANG. For
example, files that begin with "#!/usr/local/bin/perl5.8.8" will
be counted with the Perl counter by using
The language name is case insensitive but the name of the script language
executable, "S", must have the right case. This option can be
specified multiple times. See also --force-lang.
- Use DIR as the scratch directory instead of letting
File::Temp chose the location. Files written to this location are
not removed at the end of the run (as they are with
- Skip the file uniqueness check. This will give a
performance boost at the expense of counting files with identical contents
multiple times (if such duplicates exist).
- Count lines streamed via STDIN as if they came from
a file named FILE.
- For each file processed, write to the current directory a
version of the file which has blank lines and comments removed. The name
of each stripped file is the original file name with ".EXT"
appended to it. It is written to the current directory unless
--original-dir is on.
- Write the stripped files the same directory as the original
files. Only effective in combination with --strip-comments.
- Input arguments are report files previously created with
the --report-file option. Makes a cumulative set of results
containing the sum of data from the individual report files.
- Over-ride the operating system detection logic and run in
UNIX mode. See also --windows, --show-os.
- If SLOCCount is installed, use its compiled executables
c_count, java_count, pascal_count, php_count, and xml_count instead of
cloc's counters. SLOCCount's compiled counters are substantially faster
than cloc's and may give a performance improvement when counting projects
with large files. However, these cloc-specific features will not be
available: --diff, --count-and-diff,
- Over-ride the operating system detection logic and run in
Microsoft Windows mode. See also --unix, --show-os.
- --exclude-dir=DIR1[,DIR2 ...]
- Exclude the given comma separated directories from being
scanned. For example:
will skip all files that match "/.cache/" or "/test/" as
part of their path. Directories named ".bzr", ".cvs",
".hg", ".git", and ".svn" are always
- --exclude-ext=EXT1[,EXT2 ...]
- Do not count files having the given file name
- --exclude-lang=L1[,L2 ...]
- Exclude the given comma separated languages from being
- --exclude-list-file=FILE Ignore files and/or
directories whose names appear in FILE. FILE should have one file name per
line. Only exact matches are ignored; relative path names will be resolved
starting from the directory where cloc is invoked. See also
- --fullpath Modifies the behavior of --match-f
or --not-match-f to include the file's path in the regex, not just
the file's basename. (This does not expand each file to include its absolute
path, instead it uses as much of the path as is passed in to cloc.)
- --include-lang=L1[,L2 ...]
- Count only the given comma separated languages L1, L2, L3,
- Only count files in directories matching the Perl regex.
only counts files in directory paths containing "/src/" or
- Count all files except in directories matching the Perl
- Only count files whose basenames match the Perl regex. For
example this only counts files at start with Widget or widget:
- Count all files except those whose basenames match the Perl
- Ignore files that end with the given Perl regular
expression. For example, if given
--skip-archive='(zip|tar(\.(gz|Z|bz2|xz|7z))?)' the code will skip files
that end with .zip, .tar, .tar.gz, .tar.Z, .tar.bz2, .tar.xz, and
- On Windows, ignore hidden files.
- Save names of categorized files to FILE.
- Save names of processed source files to FILE.
- Write to FILE a list of files and file pairs showing which
files were added, removed, and/or compared during a run with
--diff. This switch forces the --diff mode on.
- Print the filters used to remove comments for language LANG
and exit. In some cases the filters refer to Perl subroutines rather than
regular expressions. An examination of the source code may be needed for
- Print this usage information and exit.
- Save names of every file found to FILE.
- Save names of ignored files and the reason they were
ignored to FILE.
- Print to STDOUT processed source code before and
after each filter is applied.
- Print information about all known (or just the given) file
extensions and exit.
- Print information about all known (or just the given)
languages and exit.
- Print the value of the operating system mode and exit. See
also --unix, --windows.
- Turn on verbose with optional numeric value.
- Long form of -v.
- Print the version of this program and exit.
- Writes to FILE the language processing filters then exits.
Useful as a first step to creating custom language definitions. See also
- Print third-generation language output. (This option can
cause report summation to fail if some reports were produced with this
option while others were produced without it.)
- --by-percent X
- Instead of comment and blank line counts, show these values
as percentages based on the value of X in the denominator:
X = 'c' -> # lines of code
X = 'cm' -> # lines of code + comments
X = 'cb' -> # lines of code + blanks
X = 'cmb' -> # lines of code + comments + blanks
For example, if using method 'c' and your code has twice as many lines of
comments as lines of code, the value in the comment column will be 200%.
The code column remains a line count.
- Write the results as comma separated values.
- Use the character C as the delimiter for comma separated
files instead of ,. This switch forces --csv to be on.
- Write the results as Markdown-formatted text.
- Synonym for --report-file=FILE.
- Show progress update after every N files are processed
(default N=100). Set N to 0 to suppress progress output; useful when
redirecting output to STDOUT.
- Suppress all information messages except for the final
- Write the results to FILE instead of standard output.
- Write results as SQL CREATE and INSERT statements which can
be read by a database program such as SQLite. If FILE is -, output
is sent to STDOUT.
- Append SQL insert statements to the file specified by
--sql and do not generate table creation option.
- Use <name> as the project identifier for the current
run. Only valid with the --sql option.
- Write SQL statements in the given style instead of the
default SQLite format. Currently, the only style option is Oracle.
- For plain text reports, show the SUM: output line even if
only one input file is processed.
- Write the results in XML.
- Reference FILE as an XSL stylesheet within the XML output.
If FILE is not given, writes a default stylesheet, cloc.xsl. This switch
forces --xml to be on.
- Write the results in YAML.
Count the lines of code in the Perl 5.10.0 compressed tar file on a UNIX-like
Count the changes in files, code, and comments between Python releases 2.6.6 and
cloc --diff Python-2.6.6.tar.bz Python-2.7.tar.bz2
To see how cloc aligns files for comparison between two code bases, use the
option. Here the alignment information is written
cloc --diff-aligment=align.txt gcc-4.4.0.tar.bz2 gcc-4.5.0.tar.bz2
Print the recognized languages
Remove comments from "foo.c" and save the result in
cloc --strip-comments=nc foo.c
Additional examples can be found at <http://cloc.sourceforge.net>.
The cloc program was written by Al Danial <email@example.com> and is
Copyright (C) 2006-2016 <firstname.lastname@example.org>.
The manual page was originally written by Jari Aalto
Both the code and documentation is released under the GNU GPL version 2 or (at
your option) any later version. For more information about license, visit