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v/tools/modules/scripting/scripting.v

90 lines
1.7 KiB
V

module scripting
import os
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 verbose_trace(label string, message string) {
if os.getenv('VERBOSE').len > 0 {
slabel := 'scripting.${label}'
println('# ${slabel:-25s} : $message')
}
}
pub fn verbose_trace_exec_result(x os.Result) {
if os.getenv('VERBOSE').len > 0 {
println('# cmd.exit_code : ${x.exit_code.str():-4s} cmd.output:')
println('# ----------------------------------- #')
mut lnum := 1
lines := x.output.split_into_lines()
for line in lines {
println('# ${lnum:3d}: $line')
lnum++
}
println('# ----------------------------------- #')
}
}
pub fn chdir(path string) {
verbose_trace(@FN, 'cd $path')
os.chdir(path)
}
pub fn run(cmd string) string {
verbose_trace(@FN, cmd)
x := os.exec(cmd) or {
verbose_trace(@FN, '## failed.')
return ''
}
verbose_trace_exec_result(x)
if x.exit_code == 0 {
return x.output
}
return ''
}
pub fn exit_0_status(cmd string) bool {
verbose_trace(@FN, cmd)
x := os.exec(cmd) or {
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')
}
}