v/cmd/tools/modules/scripting/scripting.v

126 lines
2.6 KiB
V

module scripting
import os
import term
const (
term_colors = term.can_show_color_on_stdout()
)
pub fn set_verbose(on bool) {
// setting a global here would be the obvious solution,
// but V does not have globals normally.
if on {
os.setenv('VERBOSE', '1', true)
} else {
os.unsetenv('VERBOSE')
}
}
pub fn cprintln(message string) {
mut omessage := message
omessage = if scripting.term_colors { term.green(omessage) } else { omessage }
println(omessage)
}
pub fn verbose_trace(label string, message string) {
if os.getenv('VERBOSE').len > 0 {
slabel := 'scripting.$label'
cprintln('# ${slabel:-25s} : $message')
}
}
pub fn verbose_trace_exec_result(x os.Result) {
if os.getenv('VERBOSE').len > 0 {
cprintln('# cmd.exit_code : ${x.exit_code.str():-4s} cmd.output:')
cprintln('# ----------------------------------- #')
mut lnum := 1
lines := x.output.split_into_lines()
for line in lines {
cprintln('# ${lnum:3d}: $line')
lnum++
}
cprintln('# ----------------------------------- #')
}
}
pub fn chdir(path string) {
verbose_trace(@FN, 'cd $path')
os.chdir(path)
}
pub fn rmrf(path string) {
verbose_trace(@FN, 'rm -rf $path')
if os.exists(path) {
if os.is_dir(path) {
os.rmdir_all(path) or { panic(err) }
} else {
os.rm(path) or { panic(err) }
}
}
}
// execute a command, and return a result, or an error, if it failed in any way.
pub fn exec(cmd string) ?os.Result {
verbose_trace(@FN, cmd)
x := os.execute(cmd)
if x.exit_code != 0 {
verbose_trace(@FN, '## failed.')
return error(x.output)
}
verbose_trace_exec_result(x)
return x
}
// run a command, tracing its results, and returning ONLY its output
pub fn run(cmd string) string {
verbose_trace(@FN, cmd)
x := os.execute(cmd)
if x.exit_code < 0 {
verbose_trace(@FN, '## failed.')
return ''
}
verbose_trace_exec_result(x)
if x.exit_code == 0 {
return x.output.trim_right('\r\n')
}
return ''
}
pub fn exit_0_status(cmd string) bool {
verbose_trace(@FN, cmd)
x := os.execute(cmd)
if x.exit_code < 0 {
verbose_trace(@FN, '## failed.')
return false
}
verbose_trace_exec_result(x)
if x.exit_code == 0 {
return true
}
return false
}
pub fn tool_must_exist(toolcmd string) {
verbose_trace(@FN, toolcmd)
if exit_0_status('type $toolcmd') {
return
}
eprintln('Missing tool: $toolcmd')
eprintln('Please try again after you install it.')
exit(1)
}
pub fn used_tools_must_exist(tools []string) {
for t in tools {
tool_must_exist(t)
}
}
pub fn show_sizes_of_files(files []string) {
for f in files {
size := os.file_size(f)
println('${size:10d} $f')
}
}