genhtml - Generate HTML view from LCOV coverage data files

genhtml [-h|--help] [-v|--version]

[-q|--quiet] [-s|--show-details] [-f|--frames]

[-b|--baseline-file] baseline-file

[-o|--output-directory output-directory]

[-t|--title title]

[-d|--description-file description-file]

[-k|--keep-descriptions] [-c|--css-file css-file]

[-p|--prefix prefix] [--no-prefix]

[--no-source] [--num-spaces num] [--highlight]

tracefile(s)

Create an HTML view of coverage data found in tracefile. Note that tracefile may also be a list of filenames.

HTML output files are created in the current working directory unless the --output-directory option is used. If tracefile ends with ".gz", it is assumed to be GZIP-compressed and the gunzip tool will be used to decompress it transparently.

Note that all source code files have to be present and readable at the exact file system location they were compiled.

Use option --css-file to modify layout and colors of the generated HTML output. Files are marked in different colors depending on the associated coverage rate. By default, the coverage limits for low, medium and high coverage are set to 0-15%, 15-50% and 50-100% percent respectively. To change these values, use configuration file options genhtml_hi_limit and genhtml_med_limit.

-h

--help Print a short help text, then exit.

-v

--version Print version number, then exit.

-q

--quiet Do not print progress messages.

Suppresses all informational progress output. When this switch is enabled, only error or warning messages are printed.

-f

--frames Use HTML frames for source code view.

If enabled, a frameset is created for each source code file, providing an overview of the source code as a "clickable" image. Note that this option will slow down output creation noticeably because each source code character has to be inspected once. Note also that the GD.pm PERL module has to be installed for this option to work (it may be obtained from http://www.cpan.org).

-s

--show-details Generate detailed directory view.

When this option is enabled, genhtml generates two versions of each file view. One containing the standard information plus a link to a "detailed" version. The latter additionally contains information about which test case covered how many lines of each source file.

-b baseline-file

--baseline-file baseline-file Use data in baseline-file as coverage baseline.

The tracefile specified by baseline-file is read and all counts found in the original tracefile are decremented by the corresponding counts in baseline-file before creating any output.

Note that when a count for a particular line in baseline-file is greater than the count in the tracefile, the result is zero.

-o output-directory

--output-directory output-directory Create files in output-directory.

Use this option to tell genhtml to write the resulting files to a directory other than the current one. If output-directory does not exist, it will be created.

It is advisable to use this option since depending on the project size, a lot of files and subdirectories may be created.

-t title

--title title Display title in header of all pages.

title is written to the header portion of each generated HTML page to identify the context in which a particular output was created. By default this is the name of the tracefile.

-d description-file

--description-file description-file Read test case descriptions from description-file.

All test case descriptions found in description-file and referenced in the input data file are read and written to an extra page which is then incorporated into the HTML output.

The file format of description-file is:

for each test case: TN:<testname>

TD:<test description>

-k

--keep-descriptions Do not remove unused test descriptions.

Keep descriptions found in the description file even if the coverage data indicates that the associated test case did not cover any lines of code.

This option can also be configured permanently using the configuration file option genhtml_keep_descriptions.

-c css-file

--css-file css-file Use external style sheet file css-file.

Using this option, an extra .css file may be specified which will replace the default one. This may be helpful if the default colors make your eyes want to jump out of their sockets :)

This option can also be configured permanently using the configuration file option genhtml_css_file.

-p prefix

--prefix prefix Remove prefix from all directory names.

Because lists containing long filenames are difficult to read, there is a mechanism implemented that will automatically try to shorten all directory names on the overview page beginning with a common prefix. By default, this is done using an algorithm that tries to find the prefix which, when applied, will minimize the resulting sum of characters of all directory names.

Use this option to specify the prefix to be removed by yourself.

--no-prefix Do not remove prefix from directory names.

This switch will completely disable the prefix mechanism described in the previous section.

This option can also be configured permanently using the configuration file option genhtml_no_prefix.

--no-source Do not create source code view.

Use this switch if you don't want to get a source code view for each file.

This option can also be configured permanently using the configuration file option genhtml_no_source.

--num-spaces spaces Replace tabs in source view with num spaces.

Default value is 8.

This option can also be configured permanently using the configuration file option genhtml_num_spaces.

--highlight Highlight lines with converted-only coverage data.

Use this option in conjunction with the --diff option of lcov to highlight those lines which were only covered in data sets which were converted from previous source code versions.

This option can also be configured permanently using the configuration file option genhtml_highlight.

/etc/lcovrc The systemwide configuration file.

~/.lcovrc The per-user configuration file.

Peter Oberparleiter <Peter.Oberparleiter@de.ibm.com>

lcov(1), geninfo(1), genpng(1), gendesc(1), gcov(1)