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

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module scripting
import os
import term
import time
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 cprint(omessage string) {
mut message := omessage
if scripting.term_colors {
message = term.cyan(message)
}
print(message)
}
pub fn cprint_strong(omessage string) {
mut message := omessage
if scripting.term_colors {
message = term.bright_green(message)
}
print(message)
}
pub fn cprintln(omessage string) {
cprint(omessage)
println('')
}
pub fn cprintln_strong(omessage string) {
cprint_strong(omessage)
println('')
}
pub fn verbose_trace(label string, message string) {
if os.getenv('VERBOSE').len > 0 {
slabel := '$time.now().format_ss_milli() $label'
cprintln('# ${slabel:-43s} : $message')
}
}
pub fn verbose_trace_strong(label string, omessage string) {
if os.getenv('VERBOSE').len > 0 {
slabel := '$time.now().format_ss_milli() $label'
mut message := omessage
if scripting.term_colors {
message = term.bright_green(message)
}
cprintln('# ${slabel:-43s} : $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:')
mut lnum := 1
lines := x.output.split_into_lines()
for oline in lines {
mut line := oline
if scripting.term_colors {
line = term.bright_green(line)
}
cprintln('# ${lnum:3d}: $line')
lnum++
}
cprintln('# ----------------------------------------------------------------------')
}
}
fn modfn(mname string, fname string) string {
return '${mname}.$fname'
}
pub fn chdir(path string) {
verbose_trace_strong(modfn(@MOD, @FN), 'cd $path')
os.chdir(path) or {
verbose_trace(modfn(@MOD, @FN), '## failed.')
return
}
}
pub fn mkdir(path string) ? {
verbose_trace_strong(modfn(@MOD, @FN), 'mkdir $path')
os.mkdir(path) or {
verbose_trace(modfn(@MOD, @FN), '## failed.')
return err
}
}
pub fn mkdir_all(path string) ? {
verbose_trace_strong(modfn(@MOD, @FN), 'mkdir -p $path')
os.mkdir_all(path) or {
verbose_trace(modfn(@MOD, @FN), '## failed.')
return err
}
}
pub fn rmrf(path string) {
verbose_trace_strong(modfn(@MOD, @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_strong(modfn(@MOD, @FN), cmd)
x := os.execute(cmd)
if x.exit_code != 0 {
verbose_trace(modfn(@MOD, @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_strong(modfn(@MOD, @FN), cmd)
x := os.execute(cmd)
if x.exit_code < 0 {
verbose_trace(modfn(@MOD, @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_strong(modfn(@MOD, @FN), cmd)
x := os.execute(cmd)
if x.exit_code < 0 {
verbose_trace(modfn(@MOD, @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(modfn(@MOD, @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 $f') // println('${size:10d} $f')
}
}