spf13--cobra/nushell_completions.go

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2022-11-12 02:05:24 +00:00
// Copyright 2013-2022 The Cobra Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cobra
import (
"bytes"
"fmt"
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"io"
"os"
)
func (c *Command) GenNushellCompletion(w io.Writer) error {
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buf := new(bytes.Buffer)
WriteStringAndCheck(buf, fmt.Sprintf(`
# An external configurator that works with any cobra based
# command line application (e.g. kubectl, minikube)
let cobra_completer = {|spans|
let ShellCompDirectiveError = %[1]d
let ShellCompDirectiveNoSpace = %[2]d
let ShellCompDirectiveNoFileComp = %[3]d
let ShellCompDirectiveFilterFileExt = %[4]d
let ShellCompDirectiveFilterDirs = %[5]d
let cmd = $spans.0
let last_span = ($spans | last | str trim)
# skip the first entry in the span (the command) and join the rest of the span to create __complete args
let cmd_args = ($spans | skip 1 | str join ' ')
# If the last span entry was empty add "" to the end of the command args
let cmd_args = if ($last_span | is-empty) {
$'($cmd_args) ""'
} else {
$cmd_args
}
# The full command to be executed with active help disable (Nushell does not support active help)
let full_cmd = $'($cmd)_ACTIVE_HELP=0 ($cmd) __complete ($cmd_args)'
# Since nushell doesn't have anything like eval, execute in a subshell
let result = (do -i { nu -c $"'($full_cmd)'" } | complete)
# Create a record with all completion related info.
# directive and directive_str are for posterity
let stdout_lines = ($result.stdout | lines)
let directive = ($stdout_lines | last | str trim | str replace ":" "" | into int)
let completions = ($stdout_lines | drop | parse -r '([\w\-\.:\+\=]*)\t?(.*)' | rename value description)
# Add space at the end of each completion
let completions = if $directive != $ShellCompDirectiveNoSpace {
($completions | each {|it| {value: $"($it.value) ", description: $it.description}})
} else {
$completions
}
if $last_span =~ '=$' {
# return flag as part of the completion so that it doesn't get replaced
$completions | each {|it| $"($last_span)($it.value)" }
} else if $directive == $ShellCompDirectiveNoFileComp {
# Allow empty results as this will stop file completion
$completions
} else if ($completions | is-empty) or $directive == $ShellCompDirectiveError {
# Not returning null causes file completions to break
# Return null if there are no completions or ShellCompDirectiveError
null
} else {
$completions
}
}
`, ShellCompDirectiveError, ShellCompDirectiveNoSpace, ShellCompDirectiveNoFileComp,
ShellCompDirectiveFilterFileExt, ShellCompDirectiveFilterDirs))
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_, err := buf.WriteTo(w)
return err
}
func (c *Command) GenNushellCompletionFile(filename string) error {
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outFile, err := os.Create(filename)
if err != nil {
return err
}
defer outFile.Close()
return c.GenNushellCompletion(outFile)
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}