mirror of
https://github.com/opentofu/opentofu.git
synced 2024-12-25 08:21:07 -06:00
98 lines
2.6 KiB
Go
98 lines
2.6 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: MPL-2.0
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package main
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import (
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"bytes"
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"fmt"
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"log"
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"sort"
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"strings"
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"github.com/mitchellh/cli"
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)
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// helpFunc is a cli.HelpFunc that can be used to output the help CLI instructions for OpenTofu.
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func helpFunc(commands map[string]cli.CommandFactory) string {
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// Determine the maximum key length, and classify based on type
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var otherCommands []string
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maxKeyLen := 0
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for key := range commands {
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if _, ok := HiddenCommands[key]; ok {
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// We don't consider hidden commands when deciding the
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// maximum command length.
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continue
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}
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if len(key) > maxKeyLen {
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maxKeyLen = len(key)
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}
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isOther := true
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for _, candidate := range PrimaryCommands {
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if candidate == key {
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isOther = false
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break
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}
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}
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if isOther {
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otherCommands = append(otherCommands, key)
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}
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}
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sort.Strings(otherCommands)
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// The output produced by this is included in the docs at
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// website/source/docs/cli/commands/index.html.markdown; if you
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// change this then consider updating that to match.
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helpText := fmt.Sprintf(`
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Usage: tofu [global options] <subcommand> [args]
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The available commands for execution are listed below.
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The primary workflow commands are given first, followed by
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less common or more advanced commands.
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Main commands:
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%s
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All other commands:
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%s
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Global options (use these before the subcommand, if any):
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-chdir=DIR Switch to a different working directory before executing the
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given subcommand.
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-help Show this help output, or the help for a specified subcommand.
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-version An alias for the "version" subcommand.
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`, listCommands(commands, PrimaryCommands, maxKeyLen), listCommands(commands, otherCommands, maxKeyLen))
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return strings.TrimSpace(helpText)
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}
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// listCommands just lists the commands in the map with the
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// given maximum key length.
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func listCommands(allCommands map[string]cli.CommandFactory, order []string, maxKeyLen int) string {
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var buf bytes.Buffer
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for _, key := range order {
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commandFunc, ok := allCommands[key]
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if !ok {
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// This suggests an inconsistency in the command table definitions
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// in commands.go .
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panic("command not found: " + key)
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}
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command, err := commandFunc()
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if err != nil {
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// This would be really weird since there's no good reason for
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// any of our command factories to fail.
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log.Printf("[ERR] cli: Command '%s' failed to load: %s",
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key, err)
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continue
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}
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key = fmt.Sprintf("%s%s", key, strings.Repeat(" ", maxKeyLen-len(key)))
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buf.WriteString(fmt.Sprintf(" %s %s\n", key, command.Synopsis()))
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}
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return buf.String()
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}
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