44 lines
		
	
	
		
			1.1 KiB
		
	
	
	
		
			Ruby
		
	
	
	
	
	
			
		
		
	
	
			44 lines
		
	
	
		
			1.1 KiB
		
	
	
	
		
			Ruby
		
	
	
	
	
	
| module Utils
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|   def self.git_available?
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|     return @git if instance_variable_defined?(:@git)
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|     @git = quiet_system HOMEBREW_SHIMS_PATH/"scm/git", "--version"
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|   end
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| 
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|   def self.git_path
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|     return unless git_available?
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|     @git_path ||= Utils.popen_read(
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|       HOMEBREW_SHIMS_PATH/"scm/git", "--homebrew=print-path"
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|     ).chuzzle
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|   end
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| 
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|   def self.git_version
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|     return unless git_available?
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|     @git_version ||= Utils.popen_read(
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|       HOMEBREW_SHIMS_PATH/"scm/git", "--version"
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|     ).chomp[/git version (\d+(?:\.\d+)*)/, 1]
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|   end
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| 
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|   def self.ensure_git_installed!
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|     return if git_available?
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| 
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|     # we cannot install brewed git if homebrew/core is unavailable.
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|     raise "Git is unavailable" unless CoreTap.instance.installed?
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| 
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|     begin
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|       oh1 "Installing git"
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|       safe_system HOMEBREW_BREW_FILE, "install", "git"
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|     rescue
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|       raise "Git is unavailable"
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|     end
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| 
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|     clear_git_available_cache
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|     raise "Git is unavailable" unless git_available?
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|   end
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| 
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|   def self.clear_git_available_cache
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|     remove_instance_variable(:@git) if instance_variable_defined?(:@git)
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|     @git_path = nil
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|     @git_version = nil
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|   end
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| end
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