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72d10fff0b
These definitions are scattered throughout the codebase which makes it hard to refactor them later (my goal is to move them outside of HOMEBREW_LIBRARY). Unify their definitions for clearer code and easier movement later.
44 lines
797 B
Ruby
44 lines
797 B
Ruby
require "fcntl"
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class FormulaLock
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def initialize(name)
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@name = name
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@path = HOMEBREW_LOCK_DIR/"#{@name}.brewing"
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@lockfile = nil
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end
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def lock
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HOMEBREW_LOCK_DIR.mkpath
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@lockfile = get_or_create_lockfile
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unless @lockfile.flock(File::LOCK_EX | File::LOCK_NB)
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raise OperationInProgressError, @name
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end
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end
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def unlock
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unless @lockfile.nil? || @lockfile.closed?
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@lockfile.flock(File::LOCK_UN)
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@lockfile.close
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end
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end
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def with_lock
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lock
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yield
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ensure
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unlock
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end
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private
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def get_or_create_lockfile
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if @lockfile.nil? || @lockfile.closed?
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@lockfile = @path.open(File::RDWR | File::CREAT)
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@lockfile.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)
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@lockfile
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else
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@lockfile
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end
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end
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end
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