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v.pref: make -b unknown_backend an error, with a more informative diagnostic message

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This commit is contained in:
Delyan Angelov
2022-12-01 15:28:03 +02:00
parent 02f5c59340
commit 161847ed1a
2 changed files with 16 additions and 9 deletions
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16
vlib/v/pref/pref.v
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@@ -47,12 +47,12 @@ pub enum ColorOutput {
pub enum Backend {
c // The (default) C backend
golang // Go backend
interpret // Interpret the ast
js_node // The JavaScript NodeJS backend
js_browser // The JavaScript browser backend
js_freestanding // The JavaScript freestanding backend
native // The Native backend
interpret // Interpret the ast
golang // Go backend
}
pub fn (b Backend) is_js() bool {
@@ -687,7 +687,11 @@ pub fn parse_args_and_show_errors(known_external_commands []string, args []strin
'-b', '-backend' {
sbackend := cmdline.option(current_args, arg, 'c')
res.build_options << '${arg} ${sbackend}'
b := backend_from_string(sbackend) or { continue }
b := backend_from_string(sbackend) or {
eprintln('Unknown V backend: ${sbackend}')
eprintln('Valid -backend choices are: c, go, interpret, js, js_node, js_browser, js_freestanding, native')
exit(1)
}
if b.is_js() {
res.output_cross_c = true
}
@@ -960,15 +964,17 @@ fn is_source_file(path string) bool {
}
pub fn backend_from_string(s string) !Backend {
// TODO: unify the "different js backend" options into a single `-b js`
// + a separate option, to choose the wanted JS output.
match s {
'c' { return .c }
'js' { return .js_node }
'go' { return .golang }
'interpret' { return .interpret }
'js' { return .js_node }
'js_node' { return .js_node }
'js_browser' { return .js_browser }
'js_freestanding' { return .js_freestanding }
'native' { return .native }
'interpret' { return .interpret }
else { return error('Unknown backend type ${s}') }
}
}