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31 lines
761 B
31 lines
761 B
# |
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# Defines helper functions. |
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# |
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# Authors: |
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# Sorin Ionescu <sorin.ionescu@gmail.com> |
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# |
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# Checks if a file can be autoloaded by trying to load it in a subshell. |
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function is-autoloadable { |
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( unfunction $1 ; autoload -U +X $1 ) &> /dev/null |
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} |
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# Checks if a name is a command, function, or alias. |
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function is-callable { |
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(( $+commands[$1] || $+functions[$1] || $+aliases[$1] || $+builtins[$1] )) |
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} |
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# Checks a boolean variable for "true". |
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# Case insensitive: "1", "y", "yes", "t", "true", "o", and "on". |
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function is-true { |
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[[ -n "$1" && "$1" == (1|[Yy]([Ee][Ss]|)|[Tt]([Rr][Uu][Ee]|)|[Oo]([Nn]|)) ]] |
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} |
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# Prints the first non-empty string in the arguments array. |
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function coalesce { |
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for arg in $argv; do |
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print "$arg" |
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return 0 |
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done |
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return 1 |
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}
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