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v/cmd/tools/vself.v

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module main
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import os
import os.cmdline
import v.util.recompilation
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const is_debug = os.args.contains('-debug')
// support a renamed `v` executable too:
const vexe = os.getenv_opt('VEXE') or { @VEXE }
const vroot = os.dir(vexe)
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fn main() {
// make testing `v up` easier, by providing a way to force `v self` to fail,
// to test the fallback logic:
if os.getenv('VSELF_SHOULD_FAIL') != '' {
eprintln('v self failed')
exit(1)
}
vexe_name := os.file_name(vexe)
short_v_name := vexe_name.all_before('.')
//
recompilation.must_be_enabled(vroot, 'Please install V from source, to use `${vexe_name} self` .')
os.chdir(vroot)!
os.setenv('VCOLORS', 'always', true)
mut args := os.args[1..].filter(it != 'self')
if args.len == 0 || ('-cc' !in args && '-prod' !in args) {
// compiling by default, i.e. `v self`:
uos := os.user_os()
uname := os.uname()
if uos == 'macos' && uname.machine == 'arm64' {
// Apple silicon, like m1, m2 etc
// Use tcc by default for V, since tinycc is much faster and also
// it already supports compiling many programs like V itself, that do not depend on inlined objective-C code
args << '-cc tcc'
}
}
jargs := args.join(' ')
obinary := cmdline.option(args, '-o', '')
sargs := if obinary != '' { jargs } else { '${jargs} -o v2' }
cmd := '${os.quoted_path(vexe)} ${sargs} ${os.quoted_path('cmd/v')}'
options := if args.len > 0 { '(${sargs})' } else { '' }
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println('V self compiling ${options}...')
compile(vroot, cmd)
if obinary != '' {
// When -o was given, there is no need to backup/rename the original.
// The user just wants an independent copy of v, and so we are done.
return
}
backup_old_version_and_rename_newer(short_v_name) or { panic(err.msg()) }
println('V built successfully as executable "${vexe_name}".')
}
fn compile(vroot string, cmd string) {
result := os.execute_or_exit(cmd)
if result.exit_code != 0 {
eprintln('cannot compile to `${vroot}`: \n${result.output}')
exit(1)
}
if result.output.len > 0 {
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println(result.output.trim_space())
}
}
fn list_folder(short_v_name string, bmessage string, message string) {
if !is_debug {
return
}
if bmessage != '' {
println(bmessage)
}
if os.user_os() == 'windows' {
os.system('dir ${short_v_name}*.exe')
} else {
os.system('ls -lartd ${short_v_name}*')
}
println(message)
}
fn backup_old_version_and_rename_newer(short_v_name string) !bool {
mut errors := []string{}
short_v_file := if os.user_os() == 'windows' { '${short_v_name}.exe' } else { '${short_v_name}' }
short_v2_file := if os.user_os() == 'windows' { 'v2.exe' } else { 'v2' }
short_bak_file := if os.user_os() == 'windows' { 'v_old.exe' } else { 'v_old' }
v_file := os.real_path(short_v_file)
v2_file := os.real_path(short_v2_file)
bak_file := os.real_path(short_bak_file)
list_folder(short_v_name, 'before:', 'removing ${bak_file} ...')
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if os.exists(bak_file) {
os.rm(bak_file) or { errors << 'failed removing ${bak_file}: ${err.msg()}' }
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}
list_folder(short_v_name, '', 'moving ${v_file} to ${bak_file} ...')
os.mv(v_file, bak_file) or { errors << err.msg() }
list_folder(short_v_name, '', 'removing ${v_file} ...')
os.rm(v_file) or {}
list_folder(short_v_name, '', 'moving ${v2_file} to ${v_file} ...')
os.mv_by_cp(v2_file, v_file) or { panic(err.msg()) }
list_folder(short_v_name, 'after:', '')
if errors.len > 0 {
eprintln('backup errors:\n >> ' + errors.join('\n >> '))
}
return true
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}