121 lines
3.3 KiB
Ruby
121 lines
3.3 KiB
Ruby
module Gitlab
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class GitAccess
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DOWNLOAD_COMMANDS = %w{ git-upload-pack git-upload-archive }
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PUSH_COMMANDS = %w{ git-receive-pack }
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attr_reader :params, :project, :git_cmd, :user
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def allowed?(actor, cmd, project, changes = nil)
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case cmd
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when *DOWNLOAD_COMMANDS
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if actor.is_a? User
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download_allowed?(actor, project)
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elsif actor.is_a? DeployKey
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actor.projects.include?(project)
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elsif actor.is_a? Key
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download_allowed?(actor.user, project)
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else
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raise 'Wrong actor'
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end
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when *PUSH_COMMANDS
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if actor.is_a? User
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push_allowed?(actor, project, changes)
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elsif actor.is_a? DeployKey
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# Deploy key not allowed to push
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return false
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elsif actor.is_a? Key
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push_allowed?(actor.user, project, changes)
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else
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raise 'Wrong actor'
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end
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else
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false
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end
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end
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def download_allowed?(user, project)
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if user && user_allowed?(user)
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user.can?(:download_code, project)
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else
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false
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end
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end
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def push_allowed?(user, project, changes)
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return false unless user && user_allowed?(user)
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return true if changes.blank?
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changes = changes.lines if changes.kind_of?(String)
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# Iterate over all changes to find if user allowed all of them to be applied
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changes.each do |change|
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unless change_allowed?(user, project, change)
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# If user does not have access to make at least one change - cancel all push
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return false
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end
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end
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# If user has access to make all changes
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true
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end
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def change_allowed?(user, project, change)
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oldrev, newrev, ref = change.split(' ')
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action = if project.protected_branch?(branch_name(ref))
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# we dont allow force push to protected branch
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if forced_push?(project, oldrev, newrev)
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:force_push_code_to_protected_branches
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# and we dont allow remove of protected branch
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elsif newrev == Gitlab::Git::BLANK_SHA
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:remove_protected_branches
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else
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:push_code_to_protected_branches
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end
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elsif project.repository && project.repository.tag_names.include?(tag_name(ref))
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# Prevent any changes to existing git tag unless user has permissions
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:admin_project
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else
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:push_code
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end
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user.can?(action, project)
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end
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def forced_push?(project, oldrev, newrev)
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return false if project.empty_repo?
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if oldrev != Gitlab::Git::BLANK_SHA && newrev != Gitlab::Git::BLANK_SHA
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missed_refs = IO.popen(%W(git --git-dir=#{project.repository.path_to_repo} rev-list #{oldrev} ^#{newrev})).read
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missed_refs.split("\n").size > 0
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else
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false
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end
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end
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private
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def user_allowed?(user)
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Gitlab::UserAccess.allowed?(user)
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end
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def branch_name(ref)
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ref = ref.to_s
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if ref.start_with?('refs/heads')
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ref.sub(%r{\Arefs/heads/}, '')
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else
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nil
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end
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end
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def tag_name(ref)
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ref = ref.to_s
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if ref.start_with?('refs/tags')
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ref.sub(%r{\Arefs/tags/}, '')
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else
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nil
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end
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end
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end
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end
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