Change Log

gcovr Release History and Change Log

5.0 (11 June 2021)

Breaking changes:

  • Dropped support for Python 2 and Python 3.5. From now on, gcovr will only support Python versions that enjoy upstream support.

Improvements and new features:

  • Handles spaces in gcov path. (#385)
  • Early fail when output cannot be created. (#382)
  • Add --txt for text output. (#387)
  • Add --csv for CSV output. (#376)
  • Add --exclude-lines-by-pattern to filter out source lines by arbitrary regex. (#356)
  • Add --json-summary to generate a JSON Summary report. (#366)
  • Add --coveralls to generate a Coveralls compatible JSON report. (#328)
  • Add support for output directories. If the output ends with a / or \ it is used as a directory. (#416)
  • Compare paths case insensitive if file system of working directory is case insensitive. (#329)
  • Add wildcard pattern to json --add-tracefile. (#351)
  • Enable --filter and --exclude for Combining tracefiles. (#373)
  • Only output 100.0% in text and HTML output if really 100.0%, else use 99.9%. (#389)
  • Support relative source location for shadow builds. (#410)
  • Incorrect path for header now can still generate html-details reports (#271)
  • Change format version in JSON output from number to string and update it to “0.2”. (#418, #463)
  • Only remove --root path at the start of file paths. (#452)
  • Fix coverage report for cmake ninja builds with given in-source object-directory. (#453)
  • Add issue templates. (#461)
  • Add --exclude-function-lines to exclude the line of the function definition in the coverage report. (#430)
  • Changes for HTML output format:


Internal changes:

  • Add makefile + dockerfile for simpler testing.
  • Add .gitbugtraq to link comments to issue tracker in GUIs. (#429)
  • Add GitHub actions to test PRs and master branch. (#404)
  • Remove Travis CI. (#419)
  • Remove Appveyor CI and upload coverage report from Windows and Ubuntu from the GitHub actions. (#455)
  • Add check if commit is mentioned in the CHANGELOG.rst. (#457)
  • Move flake8 config to setup.cfg and add black code formatter. (#444)
  • Fix filter/exclude relative path issue in Windows. (#320, #479)
  • Extend test framework for CI:
    • Set make variable TEST_OPTS as environment variable inside docker. (#372)
    • Add make variable USE_COVERAGE to extend flags for coverage report in GitHub actions. (#404)
    • Extend tests to use an unified diff in the assert. Add test options --generate_reference, --update_reference and --skip_clean. (#379)
    • Support multiple output patterns in integration tests. (#383)
    • New option --archive_differences to save the different files as ZIP. Use this ZIP as artifact in AppVeyor. (#392)
    • Add support for gcc-8 to test suite and docker tests. (#423)
    • Run as limited user inside docker container and add test with read only directory. (#445)

4.2 (6 November 2019)

Breaking changes:

  • Dropped support for Python 3.4.
  • Format flag parameters like --xml or --html now take an optional output file name. This potentially changes the interpretation of search paths. In gcovr --xml foo, previous gcovr versions would search the foo directory for coverage data. Now, gcovr will try to write the Cobertura report to the foo file. To keep the old meaning, separate positional arguments like gcovr --xml -- foo.

Improvements and new features:

Known issues:

  • The --keep option only works when using existing gcov files with -g/--use-gcov-files. (#285, #286)
  • Gcovr may get confused when header files in different directories have the same name. (#271)
  • Gcovr may not work when no en_US locale is available. (#166)


Internal changes:

  • More tests. (#269, #268, #269)
  • Refactoring and removal of dead code. (#280)
  • New internal data model.

4.1 (2 July 2018)

  • Fixed/improved --exclude-directories option. (#266)
  • New “Cookbook” section in the documentation. (#265)

4.0 (17 June 2018)

Breaking changes:

  • This release drops support for Python 2.6. (#250)
  • PIP is the only supported installation method.
  • No longer encoding-agnostic under Python 2.7. If your source files do not use the system encoding (probably UTF-8), you will have to specify a --source-encoding. (#148, #156, #256)
  • Filters now use forward slashes as path separators, even on Windows. (#191, #257)
  • Filters are no longer normalized into pseudo-paths. This could change the interpretation of filters in some edge cases.

Improvements and new features:

  • Improved --help output. (#236)
  • Parse the GCC 8 gcov format. (#226, #228)
  • New --source-encoding option, which fixes decoding under Python 3. (#256)
  • New --gcov-ignore-parse-errors flag. By default, gcovr will now abort upon parse errors. (#228)
  • Detect the error when gcov cannot create its output files (#243, #244)
  • Add -j flag to run gcov processes in parallel. (#3, #36, #239)
  • The --html-details flag now implies --html. (#93, #211)
  • The --html output can now be used without an --output filename (#223)
  • The docs are now managed with Sphinx. (#235, #248, #249, #252, #253)
  • New --html-title option to change the title of the HTML report. (#261, #263)
  • New options --html-medium-threshold and --html-high-threshold to customize the color legend. (#261, #264)

Internal changes:

3.4 (12 February 2018)

  • Added --html-encoding command line option (#139).
  • Added --fail-under-line and --fail-under-branch options, which will error under a given minimum coverage. (#173, #116)
  • Better pathname resolution heuristics for --use-gcov-file. (#146)
  • The --root option defaults to current directory ‘.’.
  • Improved reports for “(”, “)”, “;” lines.
  • HTML reports show full timestamp, not just date. (#165)
  • HTML reports treat 0/0 coverage as NaN, not 100% or 0%. (#105, #149, #196)
  • Add support for coverage-04.dtd Cobertura XML format (#164, #186)
  • Only Python 2.6+ is supported, with 2.7+ or 3.4+ recommended. (#195)
  • Added CI testing for Windows using Appveyor. (#189, #200)
  • Reports use forward slashes in paths, even on Windows. (#200)
  • Fix to support filtering with absolute paths.
  • Fix HTML generation with Python 3. (#168, #182, #163)
  • Fix --html-details under Windows. (#157)
  • Fix filters under Windows. (#158)
  • Fix verbose output when using existing gcov files (#143, #144)

3.3 (6 August 2016)

  • Added CI testing using TravisCI
  • Added more tests for out of source builds and other nested builds
  • Avoid common file prefixes in HTML output (#103)
  • Added the --execlude-directories argument to exclude directories from the search for symlinks (#87)
  • Added branches taken/not taken to HTML (#75)
  • Use --object-directory to scan for gcov data files (#72)
  • Improved logic for nested makefiles (#135)
  • Fixed unexpected semantics with --root argument (#108)
  • More careful checks for covered lines (#109)

3.2 (5 July 2014)

  • Adding a test for out of source builds
  • Using the starting directory when processing gcov filenames. (#42)
  • Making relative paths the default in html output.
  • Simplify html bar with coverage is zero.
  • Add option for using existing gcov files (#35)
  • Fixing --root argument processing (#27)
  • Adding logic to cover branches that are ignored (#28)

3.1 (6 December 2013)

  • Change to make the -r/--root options define the root directory for source files.
  • Fix to apply the -p option when the --html option is used.
  • Adding new option, ‘--exclude-unreachable-branches’ that will exclude branches in certain lines from coverage report.
  • Simplifying and standardizing the processing of linked files.
  • Adding tests for deeply nested code, and symbolic links.
  • Add support for multiple —filter options in same manner as —exclude option.

3.0 (10 August 2013)

  • Adding the ‘--gcov-executable’ option to specify the name/location of the gcov executable. The command line option overrides the environment variable, which overrides the default ‘gcov’.
  • Adding an empty “<methods/>” block to <classes/> in the XML output: this makes out XML complient with the Cobertura DTD. (#3951)
  • Allow the GCOV environment variable to override the default ‘gcov’ executable. The default is to search the PATH for ‘gcov’ if the GCOV environment variable is not set. (#3950)
  • Adding support for LCOV-style flags for excluding certain lines from coverage analysis. (#3942)
  • Setup additional logic to test with Python 2.5.
  • Added the --html and --html-details options to generate HTML.
  • Sort output for XML to facilitate baseline tests.
  • Added error when the --object-directory option specifies a bad directory.
  • Added more flexible XML testing, which can ignore XML elements that frequently change (e.g. timestamps).
  • Added the ‘—xml-pretty’ option, which is used to generate pretty XML output for the user manual.
  • Many documentation updates

2.4 (13 April 2012)

  • New approach to walking the directory tree that is more robust to symbolic links (#3908)
  • Normalize all reported path names
    • Normalize using the full absolute path (#3921)
    • Attempt to resolve files referenced through symlinks to a common project-relative path
  • Process gcno files when there is no corresponding gcda file to provide coverage information for unexecuted modules (#3887)
  • Windows compatibility fixes
    • Fix for how we parse source: file names (#3913)
    • Better handling od EOL indicators (#3920)
  • Fix so that gcovr cleans up all .gcov files, even those filtered by command line arguments
  • Added compatibility with GCC 4.8 (#3918)
  • Added a check to warn users who specify an empty --root option (see #3917)
  • Force gcov to run with en_US localization, so the gcovr parser runs correctly on systems with non-English locales (#3898, #3902).
  • Segregate warning/error information onto the stderr stream (#3924)
  • Miscellaneous (Python 3.x) portability fixes
  • Added the master svn revision number as part of the verson identifier

2.3.1 (6 January 2012)

  • Adding support for Python 3.x

2.3 (11 December 2011)

  • Adding the --gcov-filter and --gcov-exclude options.

2.2 (10 December 2011)

  • Added a test driver for gcovr.
  • Improved estimation of the <sources> element when using gcovr with filters.
  • Added revision and date keywords to gcovr so it is easier to identify what version of the script users are using (especially when they are running a snapshot from trunk).
  • Addressed special case mentioned in [comment:ticket:3884:1]: do not truncate the reported file name if the filter does not start matching at the beginning of the string.
  • Overhaul of the --root / --filter logic. This should resolve the issue raised in #3884, along with the more general filter issue raised in [comment:ticket:3884:1]
  • Overhaul of gcovr’s logic for determining gcc/g++’s original working directory. This resolves issues introduced in the original implementation of --object-directory (#3872, #3883).
  • Bugfix: gcovr was only including a <sources> element in the XML report if the user specified -r (#3869)
  • Adding timestamp and version attributes to the gcovr XML report (see #3877). It looks like the standard Cobertura output reports number of seconds since the epoch for the timestamp and a doted decimal version string. Now, gcovr reports seconds since the epoch and “gcovr ``"+``__version__ (e.g. “gcovr 2.2”) to differentiate it from a pure Cobertura report.

2.1 (26 November 2010)

  • Added the --object-directory option, which allows for a flexible specification of the directory that contains the objects generated by gcov.

  • Adding fix to compare the absolute path of a filename to an exclusion pattern.

  • Adding error checking when no coverage results are found. The line and branch counts can be zero.

  • Adding logic to process the -o/--output option (#3870).

  • Adding patch to scan for lines that look like:

    creating `foo'

    as well as

    creating 'foo'
  • Changing the semantics for EOL to be portable for MS Windows.

  • Add attributes to xml format so that it could be used by hudson/bamboo with cobertura plug-in.

2.0 (22 August 2010)

  • Initial release as a separate package. Earlier versions of gcovr were managed within the ‘fast’ Python package.