forked from extern/nushell
117 lines
3.0 KiB
Plaintext
117 lines
3.0 KiB
Plaintext
# Maintain a list of working directories and navigates them
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# the directory stack
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export-env {
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let-env DIRS_POSITION = 0
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let-env DIRS_LIST = [($env.PWD | path expand)]
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}
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# Add one or more directories to the list.
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# PWD becomes first of the newly added directories.
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export def-env add [
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...paths: string # directory or directories to add to working list
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] {
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mut abspaths = []
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for p in $paths {
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let exp = ($p | path expand)
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if ($exp | path type) != 'dir' {
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let span = (metadata $p).span
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error make {msg: "not a directory", label: {text: "not a directory", start: $span.start, end: $span.end } }
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}
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$abspaths = ($abspaths | append $exp)
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}
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let-env DIRS_LIST = ($env.DIRS_LIST | insert ($env.DIRS_POSITION + 1) $abspaths | flatten)
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let-env DIRS_POSITION = $env.DIRS_POSITION + 1
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_fetch 0
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}
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export alias enter = add
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# Advance to the next directory in the list or wrap to beginning.
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export def-env next [
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N:int = 1 # number of positions to move.
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] {
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_fetch $N
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}
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export alias n = next
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# Back up to the previous directory or wrap to the end.
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export def-env prev [
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N:int = 1 # number of positions to move.
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] {
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_fetch (-1 * $N)
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}
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export alias p = prev
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# Drop the current directory from the list, if it's not the only one.
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# PWD becomes the next working directory
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export def-env drop [] {
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if ($env.DIRS_LIST | length) > 1 {
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let-env DIRS_LIST = (
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($env.DIRS_LIST | take $env.DIRS_POSITION)
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| append ($env.DIRS_LIST | skip ($env.DIRS_POSITION + 1))
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)
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}
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_fetch 0
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}
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export alias dexit = drop
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# Display current working directories.
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export def-env show [] {
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mut out = []
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for $p in ($env.DIRS_LIST | enumerate) {
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$out = ($out | append [
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[active, path];
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[($p.index == $env.DIRS_POSITION), $p.item]
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])
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}
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$out
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}
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export alias shells = show
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export def-env goto [shell?: int] {
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if $shell == null {
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return (show)
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}
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if $shell < 0 or $shell >= ($env.DIRS_LIST | length) {
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let span = (metadata $shell | get span)
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error make {
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msg: $"(ansi red_bold)invalid_shell_index(ansi reset)"
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label: {
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text: $"`shell` should be between 0 and (($env.DIRS_LIST | length) - 1)"
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start: $span.start
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end: $span.end
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}
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}
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}
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let-env DIRS_POSITION = $shell
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cd ($env.DIRS_LIST | get $env.DIRS_POSITION)
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}
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export alias g = goto
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# fetch item helper
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def-env _fetch [
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offset: int, # signed change to position
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] {
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# nushell 'mod' operator is really 'remainder', can return negative values.
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# see: https://stackoverflow.com/questions/13683563/whats-the-difference-between-mod-and-remainder
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let pos = ($env.DIRS_POSITION
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+ $offset
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+ ($env.DIRS_LIST | length)
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) mod ($env.DIRS_LIST | length)
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let-env DIRS_POSITION = $pos
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cd ($env.DIRS_LIST | get $pos )
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}
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