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v help: support v help topics to list all help .txt file names

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This commit is contained in:
Delyan Angelov 2021-07-26 09:41:04 +03:00
parent 88a49d35e3
commit 517260a1eb
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GPG Key ID: 66886C0F12D595ED
2 changed files with 19 additions and 1 deletions
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1
cmd/v/help/default.txt
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@ -54,6 +54,7 @@ V supports the following commands:
Use "v help <command>" for more information about a command, example: `v help build`, `v help build-c`, `v help build-native`
Use "v help other" to see less frequently used commands.
Use "v help topics" to see a list of all known help topics.
Note: Help is required to write more help topics.
Only build, new, init, doc, fmt, vet, run, test, watch, search, install, remove, update, bin2v, check-md are properly documented currently.

19
cmd/v/help/help.v
View File

@ -11,6 +11,8 @@ const (
pub fn print_and_exit(topic string) {
vexe := pref.vexe_path()
vroot := os.dir(vexe)
topicdir := os.join_path(vroot, 'cmd', 'v', 'help')
for b in topic {
if (b >= `a` && b <= `z`) || b == `-` || (b >= `0` && b <= `9`) {
continue
@ -20,11 +22,26 @@ pub fn print_and_exit(topic string) {
}
// `init` has the same help topic as `new`
name := if topic == 'init' { 'new' } else { topic }
target_topic := os.join_path(vroot, 'cmd', 'v', 'help', '${name}.txt')
if topic == 'topics' {
println(known_topics(topicdir))
exit(0)
}
target_topic := os.join_path(topicdir, '${name}.txt')
content := os.read_file(target_topic) or {
eprintln(help.unknown_topic)
eprintln(known_topics(topicdir))
exit(1)
}
println(content)
exit(0)
}
fn known_topics(topicdir string) string {
mut res := []string{}
res << 'Known help topics:'
topic_files := os.glob(os.join_path(topicdir, '*.txt')) or { [] }
mut topics := topic_files.map(os.file_name(it).replace('.txt', ''))
topics.sort()
res << topics.join(', ')
return res.join('')
}