Ubuntu Manpage: genhtml - Generate HTML view from LCOV coverage data files

NAME

       genhtml - Generate HTML view from LCOV coverage data files

SYNOPSIS

       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]
               [--legend] [--html-prolog prolog-file]
               [--html-epilog epilog-file] [--html-extension extension]
               [--html-gzip] [--sort] [--no-sort]
               [--function-coverage] [--no-function-coverage]
               [--branch-coverage] [--no-branch-coverage]
               [--demangle-cpp] [--ignore-errors errors]
               [--config-file config-file] [--rc keyword=value]
               [--precision num] [--missed]
               tracefile(s)

DESCRIPTION

       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 0-75%, 75-90% and 90-100% percent respectively. To change these
       values, use configuration file options genhtml_hi_limit and genhtml_med_limit.

       Also note that when displaying percentages, 0% and 100% are only printed when the values are  exactly  0%
       and  100%  respectively.  Other  values  which  would conventionally be rounded to 0% or 100% are instead
       printed as nearest non-boundary value. This behavior is in accordance with that of the gcov(1) tool.

OPTIONS

-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>

Valid test case names can consist of letters, numbers and the underscore character ('_').
-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.

--legend
Include color legend in HTML output.

Use this option to include a legend explaining the meaning of color coding in the resulting HTML
output.

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

--html-prolog prolog-file
Read customized HTML prolog from prolog-file.

Use this option to replace the default HTML prolog (the initial part of the HTML source code
leading up to and including the <body> tag) with the contents of prolog-file. Within the prolog
text, the following words will be replaced when a page is generated:

@pagetitle@
The title of the page.

@basedir@
A relative path leading to the base directory (e.g. for locating css-files).

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

--html-epilog epilog-file
Read customized HTML epilog from epilog-file.

Use this option to replace the default HTML epilog (the final part of the HTML source including
</body>) with the contents of epilog-file.

Within the epilog text, the following words will be replaced when a page is generated:

@basedir@
A relative path leading to the base directory (e.g. for locating css-files).

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

--html-extension extension
Use customized filename extension for generated HTML pages.

This option is useful in situations where different filename extensions are required to render the
resulting pages correctly (e.g. php). Note that a '.' will be inserted between the filename and
the extension specified by this option.

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

--html-gzip
Compress all generated html files with gzip and add a .htaccess file specifying gzip-encoding in
the root output directory.

Use this option if you want to save space on your webserver. Requires a webserver with .htaccess
support and a browser with support for gzip compressed html.

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

--sort
--no-sort
Specify whether to include sorted views of file and directory overviews.

Use --sort to include sorted views or --no-sort to not include them. Sorted views are enabled by
default.

When sorted views are enabled, each overview page will contain links to views of that page sorted
by coverage rate.

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

--function-coverage
--no-function-coverage
Specify whether to display function coverage summaries in HTML output.

Use --function-coverage to enable function coverage summaries or --no-function-coverage to disable
it. Function coverage summaries are enabled by default

When function coverage summaries are enabled, each overview page will contain the number of
functions found and hit per file or directory, together with the resulting coverage rate. In
addition, each source code view will contain a link to a page which lists all functions found in
that file plus the respective call count for those functions.

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

--branch-coverage
--no-branch-coverage
Specify whether to display branch coverage data in HTML output.

Use --branch-coverage to enable branch coverage display or --no-branch-coverage to disable it.
Branch coverage data display is enabled by default

When branch coverage display is enabled, each overview page will contain the number of branches
found and hit per file or directory, together with the resulting coverage rate. In addition, each
source code view will contain an extra column which lists all branches of a line with indications
of whether the branch was taken or not. Branches are shown in the following format:

' + ': Branch was taken at least once
' - ': Branch was not taken
' # ': The basic block containing the branch was never executed

Note that it might not always be possible to relate branches to the corresponding source code
statements: during compilation, GCC might shuffle branches around or eliminate some of them to
generate better code.

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

--demangle-cpp
Specify whether to demangle C++ function names.

Use this option if you want to convert C++ internal function names to human readable format for
display on the HTML function overview page. This option requires that the c++filt tool is
installed (see c++filt(1)).

--ignore-errors errors
Specify a list of errors after which to continue processing.

Use this option to specify a list of one or more classes of errors after which geninfo should
continue processing instead of aborting.

errors can be a comma-separated list of the following keywords:

source: the source code file for a data set could not be found.

--config-file config-file
Specify a configuration file to use.

When this option is specified, neither the system-wide configuration file /etc/lcovrc, nor the
per-user configuration file ~/.lcovrc is read.

This option may be useful when there is a need to run several instances of genhtml with different
configuration file options in parallel.

--rc keyword=value
Override a configuration directive.

Use this option to specify a keyword=value statement which overrides the corresponding
configuration statement in the lcovrc configuration file. You can specify this option more than
once to override multiple configuration statements. See lcovrc(5) for a list of available
keywords and their meaning.

--precision num
Show coverage rates with num number of digits after the decimal-point.

Default value is 1.

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

--missed
Show counts of missed lines, functions, or branches

Use this option to change overview pages to show the count of lines, functions, or branches that
were not hit. These counts are represented by negative numbers.

When specified together with --sort, file and directory views will be sorted by missed counts.

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

FILES

       /etc/lcovrc
              The system-wide configuration file.

       ~/.lcovrc
              The per-user configuration file.

AUTHOR