Defined Type: git::clone

Defined in:
modules/git/manifests/clone.pp

Summary

Creates a git clone of a specified origin into a top level directory.

Overview

Optional parameters

Will clone http://blabla.org/core.git branch the_best_branch at

+/path/to/clone/container/+

 # Example: check out from gerrit:
 git::clone { 'analytics/wikistats2':
     directory => '/srv/wikistats2',
 }

 # Example: check out from gitlab:
 git::clone { 'repos/cloud/wikistats':
     directory => '/srv/wikistats',
     source    => 'gitlab',
 }

Examples:

git::clone { 'my_clone_name':
    directory => '/path/to/clone/container',
    origin    => 'http://blabla.org/core.git',
    branch    => 'the_best_branch'
}

Parameters:

  • directory (Stdlib::Unixpath) —

    path to clone the repository into.

  • origin (Optional[String[1]]) (defaults to: undef) —

    If this is not specified, the $title repository will be checked out from gerrit using a default gerrit url. If you set this, please specify the full repository url.

  • branch (Optional[String[1]]) (defaults to: undef) —

    Branch you would like to check out.

  • git_tag (Optional[String[1]]) (defaults to: undef) —

    Tag you would like to check out. Only one of 'branch' or 'git_tag' can be used.

  • ensure,,or. ('absent''present''latest') —

    • 'present' will just clone once.

    • 'latest' will update the checkout according to 'update_method' (see below).

    • 'absent' will ensure the directory is deleted.

  • owner (String[1]) (defaults to: 'root') —

    Owner of $directory. git commands will be run by this user.

  • group (String[1]) (defaults to: 'root') —

    Group owner of $directory.

  • bare (Boolean) (defaults to: false) —

    $directory is the GIT_DIR itself. Workspace is not checked out.

  • recurse_submodules (Boolean) (defaults to: false) —

    If true, git recurse submodules

  • shared (Boolean) (defaults to: false) —

    Enable git's core.sharedRepository=group setting for sharing the repository between serveral users, default: false

  • mode (Optional[Stdlib::Filemode]) (defaults to: undef) —

    Permission mode of $directory, default: 2755 if shared, 0755 otherwise

  • ssh (Optional[String[1]]) (defaults to: undef) —

    SSH command/wrapper to use when checking out

  • timeout (Integer) (defaults to: 300) —

    Time out in seconds for the git clone command

  • depth (Optional[Integer[1]]) (defaults to: undef) —

    the depth to clone if not present use full

  • source (String[1]) (defaults to: 'gerrit') —

    Where to request the repo from, if $origin isn't specified 'phabricator', 'github', 'gitlab' and 'gerrit' accepted

  • environment_variables (Array[String[1]]) (defaults to: []) —

    An array of additional environment variables to pass to the git exec.

  • update_method (Enum['pull', 'checkout']) (defaults to: 'pull') —

    Specifies the method to use to update the checkout when The value must be pull or checkout.

    • 'pull' will perform a merging pull if upstream changes.

    • 'checkout' will perform a forced checkout of the designated

    branch if upstream changes. Defaults to 'pull' for compatibility, but 'checkout' is the recommended value for clones that you want to be automatically maintained.

  • ensure (Enum['absent', 'latest', 'present']) (defaults to: 'present') 


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# File 'modules/git/manifests/clone.pp', line 61

define git::clone(
    Stdlib::Unixpath                    $directory,
    Enum['absent', 'latest', 'present'] $ensure                = 'present',
    Enum['pull', 'checkout']            $update_method         = 'pull',
    String[1]                           $owner                 = 'root',
    String[1]                           $group                 = 'root',
    Boolean                             $shared                = false,
    Integer                             $timeout               = 300,
    Boolean                             $bare                  = false,
    Boolean                             $recurse_submodules    = false,
    String[1]                           $source                = 'gerrit',
    Array[String[1]]                    $environment_variables = [],
    Optional[Integer[1]]                $depth                 = undef,
    Optional[String[1]]                 $origin                = undef,
    Optional[String[1]]                 $branch                = undef,
    Optional[String[1]]                 $git_tag               = undef,
    Optional[String[1]]                 $ssh                   = undef,
    Optional[Stdlib::Filemode]          $mode                  = undef,
) {

    ensure_packages('git')

    $default_url_format = $source ? {
        'phabricator'      => 'https://phabricator.wikimedia.org/diffusion/%.git',
        'github'           => 'https://github.com/wikimedia/%s.git',
        'github-toolforge' => 'https://github.com/toolforge/%s.git',
        'gerrit'           => 'https://gerrit.wikimedia.org/r/%s',
        'gitlab'           => 'https://gitlab.wikimedia.org/%s.git',
        default            => 'https://gerrit.wikimedia.org/r/%s',
    }

    $remote = $origin ? {
        undef   => sprintf($default_url_format, $title),
        default => $origin,
    }

    if $mode == undef {
        $file_mode = $shared ? {
            true    => '2775',
            default => '0755',
        }
    } elsif $shared and $mode !~ /^277\d/ {
        fail('Shared repositories must leave "mode" unspecified or set to 277?, specified as octal.')
    } else {
        $file_mode = $mode
    }

    $umask = mode2umask($file_mode)

    if $branch and $git_tag {
        fail('"branch" and "git_tag" cannot be used together.  Choose one')
    }

    case $ensure {
        'absent': {
            # make sure $directory does not exist
            file { $directory:
                ensure  => 'absent',
                recurse => true,
                force   => true,
            }
        }

        # otherwise clone the repository
        default: {
            $recurse_submodules_arg = $recurse_submodules.bool2str('--recurse-submodules', '')

            $branch_or_tag = $branch.lest || { $git_tag }
            $brancharg = $branch_or_tag.then |$x| { "-b ${branch_or_tag}" }
            $env = $ssh ? {
                undef   => $environment_variables,
                default => $environment_variables << "GIT_SSH=${ssh}",
            }

            $deptharg = $depth.then |$x| { "--depth=${depth}" }

            if $bare == true {
                $barearg = '--bare'
                $git_dir = $directory
            } else {
                $barearg = ''
                $git_dir = "${directory}/.git"
            }

            $shared_arg = $shared.bool2str('-c core.sharedRepository=group', '')
            $git = '/usr/bin/git'

            $clone_cmd = @("COMMAND"/L)
            ${git} ${shared_arg} clone \
                ${recurse_submodules_arg} \
                ${brancharg} \
                ${remote} \
                ${deptharg} \
                ${barearg} \
                ${directory}
            |- COMMAND

            # clone the repository
            exec { "git_clone_${title}":
                command     => $clone_cmd.split(/\s+/).join(' '),
                provider    => shell,
                logoutput   => on_failure,
                cwd         => '/tmp',
                environment => $env,
                creates     => "${git_dir}/config",
                umask       => $umask,
                user        => $owner,
                group       => $group,
                timeout     => $timeout,
                require     => Package['git'],
            }

            # FIXME: this is most probably to ensure the holding directory has
            # the proper mode, owner and group. However:
            # - git clone above should do it for us.
            # - git clone will fail when $directory exists so that should
            # happen after git clone.
            #
            # It most probably should always be executed in case mode, owner
            # and/or group change.
            if (!defined(File[$directory])) {
                file { $directory:
                    ensure => 'directory',
                    mode   => $file_mode,
                    owner  => $owner,
                    group  => $group,
                    before => Exec["git_clone_${title}"],
                }
            }

            # Ensure that the URL for 'origin' is always up-to-date.
            exec { "git_set_origin_${title}":
                cwd       => $directory,
                command   => "${git} remote set-url origin ${remote}",
                provider  => shell,
                logoutput => on_failure,
                unless    => "[ \"\$(${git} remote get-url origin)\" = \"${remote}\" ]",
                umask     => $umask,
                user      => $owner,
                group     => $group,
                require   => Exec["git_clone_${title}"],
            }

            # if $ensure == latest, update the checkout when there are upstream changes.
            if $ensure == 'latest' {
                $local_branch_expression = $branch_or_tag.lest || {
                    # Use the default branch name obtained from the remote.
                    "$(git remote show origin | awk -F': ' '\$1~/HEAD branch/ {print \$2; exit}')"
                }
                $ref_to_check = $git_tag ? {
                    undef => $branch ? {
                        undef   => 'remotes/origin/HEAD',
                        default => "remotes/origin/${branch}",
                    },
                    default => "refs/tags/${git_tag}",
                }
                $checkout_cmd = @("COMMAND"/L)
                ${git} ${shared_arg} checkout --force --quiet \
                    -B ${local_branch_expression} \
                    ${ref_to_check} \
                    ${recurse_submodules_arg}
                |- COMMAND
                $update_cmd = $update_method ? {
                    'checkout' => $checkout_cmd,
                    'pull'     => "${git} ${shared_arg} pull ${recurse_submodules_arg} --quiet ${deptharg}",
                }.split(/\s+/).join(' ')
                exec { "git_${update_method}_${title}":
                    cwd       => $directory,
                    command   => $update_cmd,
                    provider  => shell,
                    logoutput => on_failure,
                    # git diff --quiet will exit 1 (return false)
                    #  if there are differences
                    unless    => "${git} fetch --tags --prune --prune-tags && ${git} diff --quiet ${ref_to_check}",
                    umask     => $umask,
                    user      => $owner,
                    group     => $group,
                    require   => Exec["git_set_origin_${title}"],
                }
                # If we want submodules up to date, then we need
                # to run git submodule update --init after
                # git pull is run.
                if $recurse_submodules {
                    exec { "git_submodule_update_${title}":
                        command     => "${git} ${shared_arg} submodule update --init",
                        provider    => shell,
                        cwd         => $directory,
                        environment => $env,
                        refreshonly => true,
                        umask       => $umask,
                        user        => $owner,
                        group       => $group,
                        subscribe   => Exec["git_${update_method}_${title}"],
                    }
                }
            }
        }
    }
}