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85 lines
2.5 KiB
Ruby
85 lines
2.5 KiB
Ruby
module Utils
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SHELL_PROFILE_MAP = {
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:bash => "~/.bash_profile",
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:csh => "~/.cshrc",
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:fish => "~/.config/fish/config.fish",
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:ksh => "~/.kshrc",
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:sh => "~/.bash_profile",
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:tcsh => "~/.tcshrc",
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:zsh => "~/.zshrc",
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}.freeze
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module Shell
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# take a path and heuristically convert it
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# to a shell, return nil if there's no match
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def self.path_to_shell(path)
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# we only care about the basename
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shell_name = File.basename(path)
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# handle possible version suffix like `zsh-5.2`
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shell_name.sub!(/-.*\z/m, "")
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shell_name.to_sym if %w[bash csh fish ksh sh tcsh zsh].include?(shell_name)
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end
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def self.preferred_shell
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path_to_shell(ENV.fetch("SHELL", ""))
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end
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def self.parent_shell
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path_to_shell(`ps -p #{Process.ppid} -o ucomm=`.strip)
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end
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def self.csh_quote(str)
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# ruby's implementation of shell_escape
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str = str.to_s
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return "''" if str.empty?
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str = str.dup
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# anything that isn't a known safe character is padded
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str.gsub!(/([^A-Za-z0-9_\-.,:\/@\n])/, "\\\\" + "\\1")
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str.gsub!(/\n/, "'\\\n'")
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str
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end
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def self.sh_quote(str)
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# ruby's implementation of shell_escape
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str = str.to_s
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return "''" if str.empty?
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str = str.dup
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# anything that isn't a known safe character is padded
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str.gsub!(/([^A-Za-z0-9_\-.,:\/@\n])/, "\\\\" + "\\1")
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str.gsub!(/\n/, "'\n'")
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str
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end
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# quote values. quoting keys is overkill
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def self.export_value(shell, key, value)
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case shell
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when :bash, :ksh, :sh, :zsh
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"export #{key}=\"#{sh_quote(value)}\""
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when :fish
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# fish quoting is mostly Bourne compatible except that
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# a single quote can be included in a single-quoted string via \'
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# and a literal \ can be included via \\
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"set -gx #{key} \"#{sh_quote(value)}\""
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when :csh, :tcsh
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"setenv #{key} #{csh_quote(value)}"
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end
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end
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# return the shell profile file based on users' preferred shell
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def self.shell_profile
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SHELL_PROFILE_MAP.fetch(preferred_shell, "~/.bash_profile")
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end
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def self.prepend_path_in_shell_profile(path)
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case preferred_shell
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when :bash, :ksh, :sh, :zsh
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"echo 'export PATH=\"#{sh_quote(path)}:$PATH >> #{shell_profile}"
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when :csh, :tcsh
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"echo 'setenv PATH #{csh_quote(path)}:$PATH' >> #{shell_profile}"
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when :fish
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"echo 'set -g fish_user_paths $fish_user_paths >> #{sh_quote(path)}' >> #{shell_profile}"
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end
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end
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end
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end
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