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https://github.com/fish-shell/fish-shell
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51468b7646
It's currently too easy for someone to bork their shell by doing something like `function test; return 0; end`. That's obviously a silly, contrived, example but the point is that novice users who learn about functions are prone to do something like that without realizing it will bork the shell. Even expert users who know about the `test` builtin might forget that, say, `pwd` is a builtin. This change adds a `--shadow-builtin` flag that must be specified to indicate you know what you're doing. Fixes #3000
141 lines
4.6 KiB
Fish
141 lines
4.6 KiB
Fish
#
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# Wrap the builtin history command to provide additional functionality.
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#
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function history --shadow-builtin --description "Deletes an item from history"
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set -l argc (count $argv)
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set -l prefix_args ""
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set -l contains_args ""
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set -l cmd print
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set -l search_mode none
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set -l pager less
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if set -q PAGER
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set pager $PAGER
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end
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if test $argc -gt 0
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for i in (seq $argc)
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switch $argv[$i]
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case --delete
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set cmd delete
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case --prefix
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set search_mode prefix
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set prefix_args $argv[(math $i + 1)]
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case --contains
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set search_mode contains
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set contains_args $argv[(math $i + 1)]
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case --save
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set cmd save
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case --clear
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set cmd clear
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case --search
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set cmd print
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case --merge
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set cmd merge
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case --help
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set cmd help
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case --
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set -e argv[$i]
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break
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case "-*" "--*"
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printf ( _ "%s: invalid option -- %s\n" ) history $argv[1] >&2
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return 1
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end
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end
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else
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# Execute history builtin without any argument.
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if status --is-interactive
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builtin history | eval $pager
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else
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builtin history
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end
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return
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end
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switch $cmd
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case print
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# Print matching items. Note this may end up passing --search twice to the builtin,
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# but that's harmless.
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builtin history --search $argv
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case delete
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# Interactively delete history
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set -l found_items ""
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switch $search_mode
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case prefix
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set found_items (builtin history --search --prefix $prefix_args)
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case contains
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set found_items (builtin history --search --contains $contains_args)
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case none
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builtin history $argv
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# Save changes after deleting item.
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builtin history --save
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return 0
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end
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set found_items_count (count $found_items)
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if test $found_items_count -gt 0
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echo "[0] cancel"
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echo "[1] all"
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echo
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for i in (seq $found_items_count)
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printf "[%s] %s \n" (math $i + 1) $found_items[$i]
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end
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read --local --prompt "echo 'Delete which entries? > '" choice
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set choice (string split " " -- $choice)
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for i in $choice
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# Skip empty input, for example, if the user just hits return
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if test -z $i
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continue
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end
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# Following two validations could be embedded with "and" but I find the syntax
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# kind of weird.
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if not string match -qr '^[0-9]+$' $i
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printf "Invalid input: %s\n" $i
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continue
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end
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if test $i -gt (math $found_items_count + 1)
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printf "Invalid input : %s\n" $i
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continue
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end
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if test $i = "0"
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printf "Cancel\n"
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return
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else
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if test $i = "1"
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for item in $found_items
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builtin history --delete $item
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end
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printf "Deleted all!\n"
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else
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builtin history --delete $found_items[(math $i - 1)]
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end
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end
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end
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# Save changes after deleting item(s).
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builtin history --save
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end
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case save
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# Save changes to history file.
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builtin history $argv
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case merge
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builtin history --merge
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case help
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builtin history --help
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case clear
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# Erase the entire history.
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echo "Are you sure you want to clear history ? (y/n)"
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read ch
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if test $ch = "y"
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builtin history $argv
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echo "History cleared!"
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end
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end
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end
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