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| {{autolang|base=yes}}
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| = Mock =
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| Mock is a tool for building packages. It can build packages for different architectures and different Fedora or RHEL versions than the build host has. Mock creates chroots and builds packages in them. Its only task is to reliably populate a chroot and attempt to build a package in that chroot.
| | = This page is not maintained anymore. It has been moved to https://rpm-software-management.github.io/mock/ = |
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| Mock also offers a multi-package tool, mockchain, that can build chains of packages that depend on each other.
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| Mock is capable of building SRPMs from source configuration management if the mock-scm package is present, then building the SRPM into RPMs. See --scm-enable in the documentation.
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| == Status ==
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| Mock is currently being used for all Fedora builds. It is called by [[Koji]] and [https://copr.fedoraproject.org Copr] to build chroots and packages.
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| == Download ==
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| If you want to contribute to code, please checkout https://fedorahosted.org/mock/ for more inforations.
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| Otherwise just run "yum install mock".
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| == Setup ==
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| All users that are to use mock must be added to the 'mock' group.
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| <code>usermod -a -G mock [User name] && newgrp mock</code>
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| Configuration files are in /etc/mock. Mock versions 0.8.0 and higher cache the downloaded rpm packages (via the yum_cache plugin), which speeds up subsequent builds by a considerable margin. Nevertheless, you may wish to change the default configuration to point to local repositories to speed up builds.
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| By default, builds are done in /var/lib/mock, so be sure you have room. Starting with mock 0.8.0 and higher, you can change this via the 'basedir' config option.
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| == Plugins ==
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| * [[Projects/Mock/Plugin/BindMount|bind_mount]] - bind mountpoints inside the chroot
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| * [[Projects/Mock/Plugin/CCache|ccache]] - compiler cache plugin
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| * [[Projects/Mock/Plugin/ChrootScan|chroot_scan]] - allows you to retrieve build artifacts from buildroot (e.g. additional logs, coredumps)
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| * [[Projects/Mock/Plugin/CompressLogs|compress_logs]] - compress logs
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| * [[Projects/Mock/Plugin/LvmRoot|lvm_root]] - caching buildroots using LVM
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| * [[Projects/Mock/Plugin/Mount|mount]] - allows you to mount directories into chroot
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| * [[Projects/Mock/Plugin/PackageState|package_state]] - dumps list of available and installed packages
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| * [[Projects/Mock/Plugin/PMRequest|pm_request]] - Executes package manager commands requested by processes runninng in the chroot.
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| * [[Projects/Mock/Plugin/RootCache|root_cache]] - cache buildroots (as tar file).
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| * [[Projects/Mock/Plugin/Scm|scm]] - SCM integration module - builds directly from Git or Svn.
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| * [[Projects/Mock/Plugin/SELinux|selinux]] - on SELinux enabled box, this plugin will pretend, that SELinux is disabled in build environment.
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| * [[Projects/Mock/Plugin/Sign|sign]] - call command on the produced rpm.
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| * [[Projects/Mock/Plugin/Tmpfs|tmpfs]] - mount buildroot directory as tmpfs
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| * [[Projects/Mock/Plugin/YumCache|yum_cache]] - mount /var/cache/yum of your machine to chroot
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| == Using Mock outside your git sandbox ==
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| Create your SRPM using 'rpmbuild -bs'. Then change to the directory where your srpm was created.
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| Now you can start mock with
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| <code>mock -r <configname> rebuild package-1.2-3.src.rpm</code>
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| where <configname> is the name of a configuration from /etc/mock/, without the /etc/mock path prefix and without the .cfg suffix.
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| Note that you can track the progress of mock using the logs stored in <code>/var/lib/mock/<configfile>/result</code>
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| == Mock on EL 6 and EL 7: Yum, and DNF ==
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| Starting with the Rawhide builds for Fedora 23, Mock requires DNF to run properly. Since not all parts of DNF are available on EL 6 and EL 7, Mock cannot be run there with the default configuration.
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| There are however two workarounds available:
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| * For one time runs it is possible to pass <code>--yum</code> as an option on the command line.
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| * To make yum the default package manager, a change in <code>/etc/mock/site-defaults.cfg</code> or inside of any <code>/etc/mock/*.cfg</code> file is necessary:
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| <code>config_opts['package_manager'] = 'yum'</code>
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| For more information, please see the [http://miroslav.suchy.cz/blog/archives/2015/05/20/why_mock_does_not_work_on_el_6_and_el7_and_how_to_fix_it/index.html blog entry by Miroslav Suchý].
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| == Problems ==
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| If you encounter a bug running mock, please file it in [https://bugzilla.redhat.com/enter_bug.cgi?product=Fedora&component=mock Bugzilla], product "Fedora", component mock ([https://bugzilla.redhat.com/buglist.cgi?query_format=advanced&product=Fedora&component=mock&bug_status=NEW&bug_status=ASSIGNED&bug_status=MODIFIED&bug_status=ON_DEV&bug_status=ON_QA&bug_status=VERIFIED&bug_status=FAILS_QA&bug_status=RELEASE_PENDING&bug_status=POST Open Bugs]).
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| If your problem is specific to EPEL, then [https://bugzilla.redhat.com/enter_bug.cgi?product=Fedora%20EPEL&component=mock file it] against the "Fedora EPEL" product instead ([https://bugzilla.redhat.com/buglist.cgi?query_format=advanced&product=Fedora%20EPEL&component=mock&bug_status=NEW&bug_status=ASSIGNED&bug_status=MODIFIED&bug_status=ON_DEV&bug_status=ON_QA&bug_status=VERIFIED&bug_status=FAILS_QA&bug_status=RELEASE_PENDING&bug_status=POST Open Bugs]).
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| == Generate custom config file ==
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| Of course you may copy one and edit it manually, however if koji is already using such an config?
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| Then you can use '''mock-config --help''' for information how to generate one. E.g.:
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| koji mock-config --tag f21-build --arch=aarch64 f21
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| == See Also ==
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| * [[Using_Mock_to_test_package_builds]] has some useful tips for using mock.
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| * [[Docs/Drafts/MockSetupUsingLocalMirror]] Setting up a local mirror using Mock.
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| * [[Legacy/Mock]] has some useful tips for building packages in mock for older Fedora and Red Hat Linux releases.
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| * [http://miroslav.suchy.cz/blog/archives/2015/05/28/increase_mock_performance_-_build_packages_in_memory/index.html Increase Mock performance].
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