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06400b83b1
Add the --wraps option to 'complete' and 'function'. This allows a command to (recursively) inherit the completions of a wrapped command. Fixes #393. When evaluating a completion, we inspect the entire "wrap chain" for a command, i.e. we follow the sequence of wrapping until we either hit a loop (which we silently ignore) or the end of the chain. We then evaluate completions as if the wrapping command were substituted with the wrapped command. Currently this only works for commands, i.e. 'complete --command gco --wraps git\ checkout' won't work (that would seem to encroaching on abbreviations anyways). It might be useful to show an error message for that case. The commandline builtin reflects the commandline with the wrapped command substituted in, so e.g. git completions (which inspect the command line) will just work. This sort of command line munging is also performed by 'complete -C' so it's not totally without precedent. 'alias will also now mark its generated function as wrapping the 'target.
53 lines
1.3 KiB
Fish
53 lines
1.3 KiB
Fish
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function alias --description "Legacy function for creating shellscript functions using an alias-like syntax"
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if count $argv >/dev/null
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switch $argv[1]
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case -h --h --he --hel --help
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__fish_print_help alias
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return 0
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end
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end
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set -l name
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set -l body
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set -l prefix
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switch (count $argv)
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case 0
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echo "Fish implements aliases using functions. Use 'functions' builtin to see list of functions and 'functions function_name' to see function definition, type 'help alias' for more information."
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return 1
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case 1
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# Some seds (e.g. on Mac OS X), don't support \n in the RHS
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# Use a literal newline instead
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# http://sed.sourceforge.net/sedfaq4.html#s4.1
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set -l tmp (echo $argv|sed -e "s/\([^=]\)=/\1\\
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/")
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set name $tmp[1]
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set body $tmp[2]
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case 2
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set name $argv[1]
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set body $argv[2]
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case \*
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printf ( _ "%s: Expected one or two arguments, got %d\n") alias (count $argv)
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return 1
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end
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# Prevent the alias from immediately running into an infinite recursion if
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# $body starts with the same command as $name.
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switch $body
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case $name $name\ \* $name\t\*
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if contains $name (builtin --names)
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set prefix builtin
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else
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set prefix command
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end
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end
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eval "function $name --wraps $body; $prefix $body \$argv; end"
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end
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