mirror of https://github.com/spf13/cobra.git
rewriting nushell implementation
This commit is contained in:
Jack Wright
parent
29af015b57
commit
e7abbf39a3
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@ -23,141 +23,94 @@ import (
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func (c *Command) GenNushellCompletion(w io.Writer, includeDesc bool) error {
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buf := new(bytes.Buffer)
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name := c.Name()
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WriteStringAndCheck(buf, fmt.Sprintf(`
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# A list of cobra apps that completion will be attempted for.
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# Add new apps to this list to enable completion for them.
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let cobra_apps = ["%[1]s"]
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# An external completer that works with any cobra based
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# command line application (e.g. kubectl, minikube)
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let cobra_completer = {|spans|
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let cmd = $spans.0
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let ShellCompDirectiveError = %[1]d
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let ShellCompDirectiveNoSpace = %[2]d
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let ShellCompDirectiveNoFileComp = %[3]d
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let ShellCompDirectiveFilterFileExt = %[4]d
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let ShellCompDirectiveFilterDirs = %[5]d
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if not ($cobra_apps | where $cmd =~ $it | is-empty) {
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let ShellCompDirectiveError = %[2]d
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let ShellCompDirectiveNoSpace = %[3]d
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let ShellCompDirectiveNoFileComp = %[4]d
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let ShellCompDirectiveFilterFileExt = %[5]d
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let ShellCompDirectiveFilterDirs = %[6]d
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let last_span = ($spans | last | str trim)
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let cmd = $spans | first
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let rest = $spans | skip
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def exec_complete [
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--fuzzy,
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spans: list
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] {
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let params = {
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last_span: ($spans | last | str trim),
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spans: $spans
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}
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# If there is an equals in the last span
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# parse the span into two
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let params = if $last_span =~ '=' {
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let split = ($last_span | split row '=')
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if ($split | length) > 1 {
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{
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last_span: ($split | last),
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spans: ($spans | drop | append ($split | first) | append ($split | last))
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}
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} else {
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{
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last_span: '',
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spans: ($spans | drop | append ($split | first) | append '')
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}
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}
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} else {
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$params
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}
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def exec_complete [
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spans: list<string>
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] {
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# This will catch the stderr message related to the directive and any other errors,
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# such as the command not being a cobra based command
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let result = do --ignore-errors { cobra_active_help=0 run-external $cmd "__complete" ...$spans | complete }
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let last_span = $params.last_span
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let spans = $params.spans
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if $result != null and $result.exit_code == 0 {
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let completions = $result.stdout | lines
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# Drop the last param so we can fuzzy search on it
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let spans = if $fuzzy {
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$spans | drop
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} else {
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$spans
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}
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# the directive is the last line
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let directive = do -i { $completions | last | str replace ':' '' | into int }
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# skip the first entry in the span (the command) and join the rest of the span to create __complete args
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let cmd_args = ($spans | skip 1 | str join ' ')
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let completions = $completions | drop | each { |it|
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# the first word is the command, the rest is the description
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let words = $it | split row -r '\s{1}'
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# If the last span entry was empty add "" to the end of the command args
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let cmd_args = if ($last_span | is-empty) or $fuzzy {
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$'($cmd_args) ""'
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} else {
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$cmd_args
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}
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# If the last span contains a hypen and equals, attach it to the name
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let last_span = $spans | last
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let words = if ($last_span =~ '^-') and ($last_span =~ '=$') {
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$words | each {|it| $"($last_span)($it)" }
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} else {
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$words
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}
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# The full command to be executed with active help disable (Nushell does not support active help)
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let full_cmd = $'COBRA_ACTIVE_HELP=0 ($cmd) __complete ($cmd_args)'
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{value: ($words | first | str trim), description: ($words | skip | str join ' ')}
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}
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# Since nushell doesn't have anything like eval, execute in a subshell
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let result = (do -i { nu -c $"'($full_cmd)'" } | complete)
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{completions: $completions, directive: $directive}
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} else {
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{completions: [], directive: -1}
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}
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}
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# Create a record with all completion related info.
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# directive and directive_str are for posterity
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let stdout_lines = ($result.stdout | lines)
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let directive = ($stdout_lines | last | str trim | str replace ":" "" | into int)
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let completions = ($stdout_lines | drop | parse -r '([\w\-\.:\+\=\/]*)\t?(.*)' | rename value description)
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let completions = if $fuzzy {
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$completions | where $it.value =~ $last_span
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if (not ($rest | is-empty)) {
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let result = exec_complete $rest
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let completions = $result.completions
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let directive = $result.directive
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} else {
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($completions | where {|it| $it.value | str starts-with $last_span })
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}
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# Add space at the end of each completion
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let completions = if $directive != $ShellCompDirectiveNoSpace {
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$completions | each {|it| {value: $"($it.value) ", description: $it.description}}
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} else {
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$completions
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}
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{
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directive: $directive,
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completions: $completions
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}
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}
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# Cobra returns a list of completions that are supported with this directive
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# There is no way to currently support this in a nushell external completer
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let completions = if $directive == $ShellCompDirectiveFilterFileExt {
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[]
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} else {
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$completions
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}
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let result = (exec_complete $spans)
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let result = if (not ($last_span | is-empty)) and ($result.completions | is-empty) {
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exec_complete --fuzzy $spans
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} else {
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$result
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}
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let directive = $result.directive
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let completions = $result.completions
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# Add space at the end of each completion
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let completions = if $directive != $ShellCompDirectiveNoSpace {
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$completions | each {|it| {value: $"($it.value) ", description: $it.description}}
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} else {
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$completions
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}
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# Cobra returns a list of completions that are supported with this directive
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# There is no way to currently support this in a nushell external completer
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let completions = if $directive == $ShellCompDirectiveFilterFileExt {
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[]
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} else {
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$completions
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}
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let return_val = if $last_span =~ '=' {
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# if the completion is of the form -n= return flag as part of the completion so that it doesn't get replaced
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$completions | each {|it| $"($last_span | split row '=' | first)=($it.value)" }
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} else if $directive == $ShellCompDirectiveNoFileComp {
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# Allow empty results as this will stop file completion
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$completions
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} else if ($completions | is-empty) or $directive == $ShellCompDirectiveError {
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# Not returning null causes file completions to break
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# Return null if there are no completions or ShellCompDirectiveError
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null
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} else {
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$completions
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}
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$return_val
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} else {
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null
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}
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if $directive == $ShellCompDirectiveNoFileComp {
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# Allow empty results as this will stop file completion
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$completions
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} else if ($completions | is-empty) or $directive == $ShellCompDirectiveError {
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# Not returning null causes file completions to break
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# Return null if there are no completions or ShellCompDirectiveError
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null
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} else {
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$completions
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}
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if ($completions | is-empty) {
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null
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} else {
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$completions
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}
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} else {
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null
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}
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}
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`, name, ShellCompDirectiveError, ShellCompDirectiveNoSpace, ShellCompDirectiveNoFileComp,
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`, ShellCompDirectiveError, ShellCompDirectiveNoSpace, ShellCompDirectiveNoFileComp,
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ShellCompDirectiveFilterFileExt, ShellCompDirectiveFilterDirs))
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_, err := buf.WriteTo(w)
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