v/vlib/compiler/main.v

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// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module compiler
import (
os
strings
)
const (
Version = '0.1.21'
)
enum BuildMode {
// `v program.v'
// Build user code only, and add pre-compiled vlib (`cc program.o builtin.o os.o...`)
default_mode
// `v -lib ~/v/os`
// build any module (generate os.o + os.vh)
build_module
}
const (
supported_platforms = ['windows', 'mac', 'linux', 'freebsd', 'openbsd',
'netbsd', 'dragonfly', 'android', 'js', 'solaris']
)
enum OS {
mac
linux
windows
freebsd
openbsd
netbsd
dragonfly
js // TODO
android
solaris
}
enum Pass {
// A very short pass that only looks at imports in the beginning of
// each file
imports
// First pass, only parses and saves declarations (fn signatures,
// consts, types).
// Skips function bodies.
// We need this because in V things can be used before they are
// declared.
decl
// Second pass, parses function bodies and generates C or machine code.
main
}
struct V {
pub mut:
os OS // the OS to build for
out_name_c string // name of the temporary C file
files []string // all V files that need to be parsed and compiled
dir string // directory (or file) being compiled (TODO rename to path?)
table &Table // table with types, vars, functions etc
cgen &CGen // C code generator
pref &Preferences // all the preferences and settings extracted to a struct for reusability
lang_dir string // "~/code/v"
out_name string // "program.exe"
vroot string
mod string // module being built with -lib
parsers []Parser
vgen_buf strings.Builder // temporary buffer for generated V code (.str() etc)
cached_mods []string
}
struct Preferences {
pub mut:
build_mode BuildMode
nofmt bool // disable vfmt
is_test bool // `v test string_test.v`
is_script bool // single file mode (`v program.v`), main function can be skipped
is_live bool // for hot code reloading
is_so bool
is_prof bool // benchmark every function
translated bool // `v translate doom.v` are we running V code translated from C? allow globals, ++ expressions, etc
is_prod bool // use "-O2"
is_verbose bool // print extra information with `v.log()`
obfuscate bool // `v -obf program.v`, renames functions to "f_XXX"
is_repl bool
is_run bool
show_c_cmd bool // `v -show_c_cmd` prints the C command to build program.v.c
sanitize bool // use Clang's new "-fsanitize" option
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is_debug bool // false by default, turned on by -g or -cg, it tells v to pass -g to the C backend compiler.
is_vlines bool // turned on by -g, false by default (it slows down .tmp.c generation slightly).
is_keep_c bool // -keep_c , tell v to leave the generated .tmp.c alone (since by default v will delete them after c backend finishes)
// NB: passing -cg instead of -g will set is_vlines to false and is_g to true, thus making v generate cleaner C files,
// which are sometimes easier to debug / inspect manually than the .tmp.c files by plain -g (when/if v line number generation breaks).
is_cache bool // turns on v usage of the module cache to speed up compilation.
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is_stats bool // `v -stats file_test.v` will produce more detailed statistics for the tests that were run
no_auto_free bool // `v -nofree` disable automatic `free()` insertion for better performance in some applications (e.g. compilers)
cflags string // Additional options which will be passed to the C compiler.
// For example, passing -cflags -Os will cause the C compiler to optimize the generated binaries for size.
// You could pass several -cflags XXX arguments. They will be merged with each other.
// You can also quote several options at the same time: -cflags '-Os -fno-inline-small-functions'.
ccompiler string // the name of the used C compiler
building_v bool
autofree bool
compress bool
//skip_builtin bool // Skips re-compilation of the builtin module
// to increase compilation time.
// This is on by default, since a vast majority of users do not
// work on the builtin module itself.
}
// Should be called by main at the end of the compilation process, to cleanup
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pub fn (v mut V) finalize_compilation(){
// TODO remove
if v.pref.autofree {
/*
println('started freeing v struct')
v.table.typesmap.free()
v.table.obf_ids.free()
v.cgen.lines.free()
free(v.cgen)
for _, f in v.table.fns {
//f.local_vars.free()
f.args.free()
//f.defer_text.free()
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}
v.table.fns.free()
free(v.table)
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//for p in parsers {}
println('done!')
*/
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}
}
pub fn (v mut V) add_parser(parser Parser) {
v.parsers << parser
}
pub fn (v &V) get_file_parser_index(file string) ?int {
for i, p in v.parsers {
if os.realpath(p.file_path_id) == os.realpath(file) {
return i
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}
}
return error('parser for "$file" not found')
}
// find existing parser or create new one. returns v.parsers index
pub fn (v mut V) parse(file string, pass Pass) int {
//println('parse($file, $pass)')
pidx := v.get_file_parser_index(file) or {
mut p := v.new_parser_from_file(file)
p.parse(pass)
//if p.pref.autofree { p.scanner.text.free() free(p.scanner) }
v.add_parser(p)
return v.parsers.len-1
}
v.parsers[pidx].parse(pass)
//if v.parsers[i].pref.autofree { v.parsers[i].scanner.text.free() free(v.parsers[i].scanner) }
return pidx
}
pub fn (v mut V) compile() {
// Emily: Stop people on linux from being able to build with msvc
if os.user_os() != 'windows' && v.pref.ccompiler == 'msvc' {
verror('Cannot build with msvc on ${os.user_os()}')
}
mut cgen := v.cgen
cgen.genln('// Generated by V')
if v.pref.is_verbose {
println('all .v files before:')
println(v.files)
}
v.add_v_files_to_compile()
if v.pref.is_verbose || v.pref.is_debug {
println('all .v files:')
println(v.files)
}
/*
if v.pref.is_debug {
println('\nparsers:')
for q in v.parsers {
println(q.file_name)
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}
println('\nfiles:')
for q in v.files {
println(q)
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}
}
*/
// First pass (declarations)
for file in v.files {
v.parse(file, .decl)
}
// Main pass
cgen.pass = Pass.main
if v.pref.is_debug {
$if js {
cgen.genln('const VDEBUG = 1;\n')
} $else {
cgen.genln('#define VDEBUG (1)')
}
}
if v.os == .js {
cgen.genln('#define _VJS (1) ')
}
v_hash := vhash()
$if js {
cgen.genln('const V_COMMIT_HASH = "$v_hash";\n')
} $else {
cgen.genln('#ifndef V_COMMIT_HASH')
cgen.genln('#define V_COMMIT_HASH "$v_hash"')
cgen.genln('#endif')
}
q := cgen.nogen // TODO hack
cgen.nogen = false
$if js {
cgen.genln(js_headers)
} $else {
cgen.genln(CommonCHeaders)
}
v.generate_hotcode_reloading_declarations()
// We need the cjson header for all the json decoding that will be done in
// default mode
imports_json := 'json' in v.table.imports
if v.pref.build_mode == .default_mode {
if imports_json {
cgen.genln('#include "cJSON.h"')
}
}
if v.pref.build_mode == .default_mode {
// If we declare these for all modes, then when running `v a.v` we'll get
// `/usr/bin/ld: multiple definition of 'total_m'`
$if !js {
cgen.genln('int g_test_oks = 0;')
cgen.genln('int g_test_fails = 0;')
}
if imports_json {
cgen.genln('
#define js_get(object, key) cJSON_GetObjectItemCaseSensitive((object), (key))
')
}
}
if '-debug_alloc' in os.args {
cgen.genln('#define DEBUG_ALLOC 1')
}
//cgen.genln('/*================================== FNS =================================*/')
cgen.genln('// this line will be replaced with definitions')
mut defs_pos := cgen.lines.len - 1
if defs_pos == -1 {
defs_pos = 0
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}
cgen.nogen = q
for file in v.files {
v.parse(file, .main)
//if p.pref.autofree { p.scanner.text.free() free(p.scanner) }
// Format all files (don't format automatically generated vlib headers)
if !v.pref.nofmt && !file.contains('/vlib/') {
// new vfmt is not ready yet
}
}
// Generate .vh if we are building a module
if v.pref.build_mode == .build_module {
v.generate_vh()
}
// parse generated V code (str() methods etc)
mut vgen_parser := v.new_parser_from_string(v.vgen_buf.str(), 'vgen')
// free the string builder which held the generated methods
v.vgen_buf.free()
vgen_parser.parse(.main)
// v.parsers.add(vgen_parser)
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// All definitions
mut def := strings.new_builder(10000)// Avoid unnecessary allocations
$if !js {
def.writeln(cgen.includes.join_lines())
def.writeln(cgen.typedefs.join_lines())
def.writeln(v.type_definitions())
def.writeln('\nstring _STR(const char*, ...);\n')
def.writeln('\nstring _STR_TMP(const char*, ...);\n')
def.writeln(cgen.fns.join_lines()) // fn definitions
} $else {
def.writeln(v.type_definitions())
}
def.writeln(cgen.consts.join_lines())
def.writeln(cgen.thread_args.join_lines())
if v.pref.is_prof {
def.writeln('; // Prof counters:')
def.writeln(v.prof_counters())
}
cgen.lines[defs_pos] = def.str()
v.generate_init()
v.generate_main()
v.generate_hot_reload_code()
if v.pref.is_verbose {
v.log('flags=')
for flag in v.get_os_cflags() {
println(' * ' + flag.format())
}
}
$if js {
cgen.genln('main__main();')
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}
cgen.save()
v.cc()
}
fn (v mut V) generate_init() {
$if js { return }
if v.pref.build_mode == .build_module {
nogen := v.cgen.nogen
v.cgen.nogen = false
consts_init_body := v.cgen.consts_init.join_lines()
init_fn_name := mod_gen_name(v.mod) + '__init_consts'
v.cgen.genln('void ${init_fn_name}();\nvoid ${init_fn_name}() {\n$consts_init_body\n}')
v.cgen.nogen = nogen
}
if v.pref.build_mode == .default_mode {
mut call_mod_init := ''
mut call_mod_init_consts := ''
if 'builtin' in v.cached_mods {
v.cgen.genln('void builtin__init_consts();')
call_mod_init_consts += 'builtin__init_consts();\n'
}
for mod in v.table.imports {
init_fn_name := mod_gen_name(mod) + '__init'
if v.table.known_fn(init_fn_name) {
call_mod_init += '${init_fn_name}();\n'
}
if mod in v.cached_mods {
v.cgen.genln('void ${init_fn_name}_consts();')
call_mod_init_consts += '${init_fn_name}_consts();\n'
}
}
consts_init_body := v.cgen.consts_init.join_lines()
// vlib can't have `init_consts()`
v.cgen.genln('void init() {
g_str_buf=malloc(1000);
$call_mod_init_consts
$consts_init_body
builtin__init();
$call_mod_init
}')
// _STR function can't be defined in vlib
v.cgen.genln('
string _STR(const char *fmt, ...) {
va_list argptr;
va_start(argptr, fmt);
size_t len = vsnprintf(0, 0, fmt, argptr) + 1;
va_end(argptr);
byte* buf = malloc(len);
va_start(argptr, fmt);
vsprintf((char *)buf, fmt, argptr);
va_end(argptr);
#ifdef DEBUG_ALLOC
puts("_STR:");
puts(buf);
#endif
return tos2(buf);
}
string _STR_TMP(const char *fmt, ...) {
va_list argptr;
va_start(argptr, fmt);
//size_t len = vsnprintf(0, 0, fmt, argptr) + 1;
va_end(argptr);
va_start(argptr, fmt);
vsprintf((char *)g_str_buf, fmt, argptr);
va_end(argptr);
#ifdef DEBUG_ALLOC
//puts("_STR_TMP:");
//puts(g_str_buf);
#endif
return tos2(g_str_buf);
}
')
}
}
pub fn (v mut V) generate_main() {
mut cgen := v.cgen
$if js { return }
if v.pref.is_vlines {
///// After this point, the v files are compiled.
///// The rest is auto generated code, which will not have
///// different .v source file/line numbers.
lines_so_far := cgen.lines.join('\n').count('\n') + 5
cgen.genln('')
cgen.genln('////////////////// Reset the file/line numbers //////////')
cgen.lines << '#line $lines_so_far "${cescaped_path(os.realpath(cgen.out_path))}"'
cgen.genln('')
}
// Make sure the main function exists
// Obviously we don't need it in libraries
if v.pref.build_mode != .build_module {
if !v.table.main_exists() && !v.pref.is_test {
// It can be skipped in single file programs
if v.pref.is_script {
//println('Generating main()...')
v.gen_main_start(true)
cgen.genln('$cgen.fn_main;')
v.gen_main_end('return 0')
}
else {
verror('function `main` is not declared in the main module')
}
}
else if v.pref.is_test {
if v.table.main_exists() {
verror('test files cannot have function `main`')
}
if !v.table.has_at_least_one_test_fn() {
verror('test files need to have at least one test function')
}
// Generate a C `main`, which calls every single test function
v.gen_main_start(false)
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if v.pref.is_stats { cgen.genln('BenchedTests bt = main__start_testing();') }
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for _, f in v.table.fns {
if f.name.starts_with('main__test_') {
if v.pref.is_stats { cgen.genln('BenchedTests_testing_step_start(&bt, tos3("$f.name"));') }
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cgen.genln('$f.name();')
if v.pref.is_stats { cgen.genln('BenchedTests_testing_step_end(&bt);') }
}
}
if v.pref.is_stats { cgen.genln('BenchedTests_end_testing(&bt);') }
v.gen_main_end('return g_test_fails > 0')
}
else if v.table.main_exists() {
v.gen_main_start(true)
cgen.genln(' main__main();')
v.gen_main_end('return 0')
}
}
}
pub fn (v mut V) gen_main_start(add_os_args bool){
v.cgen.genln('int main(int argc, char** argv) { ')
v.cgen.genln(' init();')
if add_os_args && 'os' in v.table.imports {
v.cgen.genln(' os__args = os__init_os_args(argc, (byteptr*)argv);')
}
v.generate_hotcode_reloading_main_caller()
v.cgen.genln('')
}
pub fn (v mut V) gen_main_end(return_statement string){
v.cgen.genln('')
v.cgen.genln(' $return_statement;')
v.cgen.genln('}')
}
pub fn final_target_out_name(out_name string) string {
$if windows {
return out_name.replace('/', '\\') + '.exe'
}
return if out_name.starts_with('/') {
out_name
}
else {
'./' + out_name
}
}
pub fn (v V) run_compiled_executable_and_exit() {
args := env_vflags_and_os_args()
if v.pref.is_verbose {
println('============ running $v.out_name ============')
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}
mut cmd := '"' + final_target_out_name(v.out_name).replace('.exe','') + '"'
mut args_after := ' '
for i,a in args {
if i == 0 { continue }
if a.starts_with('-') { continue }
if a in ['run','test'] {
args_after += args.right(i+2).join(' ')
break
}
}
cmd += args_after
if v.pref.is_test {
ret := os.system(cmd)
if ret != 0 {
exit(1)
}
}
if v.pref.is_run {
ret := os.system(cmd)
// TODO: make the runner wrapping as transparent as possible
// (i.e. use execve when implemented). For now though, the runner
// just returns the same exit code as the child process.
exit( ret )
}
exit(0)
}
pub fn (v &V) v_files_from_dir(dir string) []string {
mut res := []string
if !os.file_exists(dir) {
if dir == 'compiler' && os.dir_exists('vlib') {
println('looks like you are trying to build V with an old command')
println('use `v v.v` instead of `v -o v compiler`')
}
verror("$dir doesn't exist")
} else if !os.dir_exists(dir) {
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verror("$dir isn't a directory")
}
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mut files := os.ls(dir) or { panic(err) }
if v.pref.is_verbose {
println('v_files_from_dir ("$dir")')
}
files.sort()
for file in files {
if !file.ends_with('.v') && !file.ends_with('.vh') {
continue
}
if file.ends_with('_test.v') {
continue
}
if file.ends_with('_win.v') && v.os != .windows {
continue
}
if file.ends_with('_lin.v') && v.os != .linux {
continue
}
if file.ends_with('_mac.v') && v.os != .mac {
continue
}
if file.ends_with('_nix.v') && v.os == .windows {
continue
}
if file.ends_with('_js.v') && v.os != .js {
continue
}
if file.ends_with('_c.v') && v.os == .js {
continue
}
res << '$dir${os.path_separator}$file'
}
return res
}
// Parses imports, adds necessary libs, and then user files
pub fn (v mut V) add_v_files_to_compile() {
mut builtin_files := v.get_builtin_files()
// Builtin cache exists? Use it.
builtin_vh := '$v_modules_path${os.path_separator}vlib${os.path_separator}builtin.vh'
if v.pref.is_cache && os.file_exists(builtin_vh) {
v.cached_mods << 'builtin'
builtin_files = [builtin_vh]
}
// Parse builtin imports
for file in builtin_files {
// add builtins first
v.files << file
mut p := v.new_parser_from_file(file)
p.parse(.imports)
//if p.pref.autofree { p.scanner.text.free() free(p.scanner) }
v.add_parser(p)
}
// Parse user imports
for file in v.get_user_files() {
mut p := v.new_parser_from_file(file)
p.parse(.imports)
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if p.v_script {
v.log('imports0:')
println(v.table.imports)
println(v.files)
p.import_table.register_import('os', 0)
v.table.file_imports[p.file_path_id] = p.import_table
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p.table.imports << 'os'
p.table.register_module('os')
println('got v script')
}
//if p.pref.autofree { p.scanner.text.free() free(p.scanner) }
v.add_parser(p)
}
// Parse lib imports
v.parse_lib_imports()
if v.pref.is_verbose {
v.log('imports:')
println(v.table.imports)
}
// resolve deps and add imports in correct order
imported_mods := v.resolve_deps().imports()
for mod in imported_mods {
if mod == 'builtin' || mod == 'main' {
// builtin already added
// main files will get added last
continue
}
// use cached built module if exists
if v.pref.build_mode != .build_module && !mod.contains('vweb') {
mod_path := mod.replace('.', os.path_separator)
vh_path := '$v_modules_path${os.path_separator}vlib${os.path_separator}${mod_path}.vh'
if v.pref.is_cache && os.file_exists(vh_path) {
eprintln('using cached module `$mod`: $vh_path')
v.cached_mods << mod
v.files << vh_path
continue
}
}
// standard module
vfiles := v.get_imported_module_files(mod)
for file in vfiles {
v.files << file
}
}
// add remaining main files last
for _, fit in v.table.file_imports {
if fit.module_name != 'main' { continue }
v.files << fit.file_path_id
}
}
pub fn (v &V) get_builtin_files() []string {
// .vh cache exists? Use it
$if js {
return v.v_files_from_dir('$v.vroot${os.path_separator}vlib${os.path_separator}builtin${os.path_separator}js')
}
return v.v_files_from_dir('$v.vroot${os.path_separator}vlib${os.path_separator}builtin')
}
// get user files
pub fn (v &V) get_user_files() []string {
mut dir := v.dir
v.log('get_v_files($dir)')
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// Need to store user files separately, because they have to be added after
// libs, but we dont know which libs need to be added yet
mut user_files := []string
if v.pref.is_test && v.pref.is_stats {
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user_files << os.join(v.vroot, 'vlib', 'benchmark', 'tests',
'always_imported.v')
}
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// v volt/slack_test.v: compile all .v files to get the environment
// I need to implement user packages! TODO
is_test_with_imports := dir.ends_with('_test.v') &&
(dir.contains('${os.path_separator}volt') || dir.contains('${os.path_separator}c2volt'))// TODO
if is_test_with_imports {
user_files << dir
pos := dir.last_index(os.path_separator)
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dir = dir.left(pos) + os.path_separator// TODO why is this needed
}
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if dir.ends_with('.v') || dir.ends_with('.vsh') {
// Just compile one file and get parent dir
user_files << dir
dir = dir.all_before(os.path_separator)
}
else {
// Add .v files from the directory being compiled
files := v.v_files_from_dir(dir)
for file in files {
user_files << file
}
}
if user_files.len == 0 {
println('No input .v files')
exit(1)
}
if v.pref.is_verbose {
v.log('user_files:')
println(user_files)
}
return user_files
}
// get module files from already parsed imports
fn (v &V) get_imported_module_files(mod string) []string {
mut files := []string
for _, fit in v.table.file_imports {
if fit.module_name == mod {
files << fit.file_path_id
}
}
return files
}
// parse deps from already parsed builtin/user files
pub fn (v mut V) parse_lib_imports() {
mut done_fits := []string
mut done_imports := []string
for {
for _, fit in v.table.file_imports {
if fit.file_path_id in done_fits { continue }
for _, mod in fit.imports {
if mod in done_imports { continue }
import_path := v.find_module_path(mod) or {
pidx := v.get_file_parser_index(fit.file_path_id) or { verror(err) break }
v.parsers[pidx].error_with_token_index('cannot import module "$mod" (not found)', fit.get_import_tok_idx(mod))
break
}
vfiles := v.v_files_from_dir(import_path)
if vfiles.len == 0 {
pidx := v.get_file_parser_index(fit.file_path_id) or { verror(err) break }
v.parsers[pidx].error_with_token_index('cannot import module "$mod" (no .v files in "$import_path")', fit.get_import_tok_idx(mod))
}
// Add all imports referenced by these libs
for file in vfiles {
pid := v.parse(file, .imports)
p_mod := v.parsers[pid].import_table.module_name
if p_mod != mod {
v.parsers[pid].error_with_token_index('bad module definition: $fit.file_path_id imports module "$mod" but $file is defined as module `$p_mod`', 1)
}
}
done_imports << mod
}
done_fits << fit.file_path_id
}
if v.table.file_imports.size == done_fits.len { break}
}
}
// return resolved dep graph (order deps)
pub fn (v &V) resolve_deps() &DepGraph {
mut dep_graph := new_dep_graph()
dep_graph.from_import_tables(v.table.file_imports)
deps_resolved := dep_graph.resolve()
if !deps_resolved.acyclic {
deps_resolved.display()
verror('import cycle detected')
}
return deps_resolved
}
pub fn get_arg(joined_args, arg, def string) string {
return get_param_after(joined_args, '-$arg', def)
}
pub fn get_param_after(joined_args, arg, def string) string {
key := '$arg '
mut pos := joined_args.index(key)
if pos == -1 {
return def
}
pos += key.len
mut space := joined_args.index_after(' ', pos)
if space == -1 {
space = joined_args.len
}
res := joined_args.substr(pos, space)
return res
}
pub fn (v &V) log(s string) {
if !v.pref.is_verbose {
return
}
println(s)
}
pub fn new_v(args[]string) &V {
// Create modules dirs if they are missing
if !os.dir_exists(v_modules_path) {
os.mkdir(v_modules_path)
os.mkdir('$v_modules_path${os.path_separator}cache')
}
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mut vgen_buf := strings.new_builder(1000)
vgen_buf.writeln('module main\nimport strings')
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joined_args := args.join(' ')
target_os := get_arg(joined_args, 'os', '')
mut out_name := get_arg(joined_args, 'o', 'a.out')
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mut dir := args.last()
if 'run' in args {
dir = get_param_after(joined_args, 'run', '')
}
if dir.ends_with(os.path_separator) {
dir = dir.all_before_last(os.path_separator)
}
if dir.starts_with('.$os.path_separator') {
dir = dir.right(2)
}
if args.len < 2 {
dir = ''
}
// build mode
mut build_mode := BuildMode.default_mode
mut mod := ''
if joined_args.contains('build module ') {
build_mode = .build_module
// v build module ~/v/os => os.o
mod_path := if dir.contains('vlib') {
dir.all_after('vlib'+os.path_separator)
}
else if dir.starts_with('.\\') || dir.starts_with('./') {
dir.right(2)
}
else if dir.starts_with(os.path_separator) {
dir.all_after(os.path_separator)
} else {
dir
}
mod = mod_path.replace(os.path_separator, '.')
println('Building module "${mod}" (dir="$dir")...')
//out_name = '$TmpPath/vlib/${base}.o'
out_name = mod
// Cross compiling? Use separate dirs for each os
/*
if target_os != os.user_os() {
os.mkdir('$TmpPath/vlib/$target_os')
out_name = '$TmpPath/vlib/$target_os/${base}.o'
println('target_os=$target_os user_os=${os.user_os()}')
println('!Cross compiling $out_name')
}
*/
}
is_test := dir.ends_with('_test.v')
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is_script := dir.ends_with('.v') || dir.ends_with('.vsh')
if is_script && !os.file_exists(dir) {
println('`$dir` does not exist')
exit(1)
}
// No -o provided? foo.v => foo
if out_name == 'a.out' && dir.ends_with('.v') && dir != '.v' {
out_name = dir.left(dir.len - 2)
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// Building V? Use v2, since we can't overwrite a running
// executable on Windows + the precompiled V is more
// optimized.
if out_name == 'v' && os.dir_exists('vlib/compiler') {
println('Saving the resulting V executable in `./v2`')
println('Use `v -o v v.v` if you want to replace current '+
'V executable.')
out_name = 'v2'
}
}
// if we are in `/foo` and run `v .`, the executable should be `foo`
if dir == '.' && out_name == 'a.out' {
base := os.getwd().all_after(os.path_separator)
out_name = base.trim_space()
}
mut _os := OS.mac
// No OS specifed? Use current system
if target_os == '' {
$if linux {
_os = .linux
}
$if mac {
_os = .mac
}
$if windows {
_os = .windows
}
$if freebsd {
_os = .freebsd
}
$if openbsd {
_os = .openbsd
}
$if netbsd {
_os = .netbsd
}
$if dragonfly {
_os = .dragonfly
}
$if solaris {
_os = .solaris
}
}
else {
_os = os_from_string(target_os)
}
// Location of all vlib files
vroot := os.dir(vexe_path())
//println('VROOT=$vroot')
// v.exe's parent directory should contain vlib
if !os.dir_exists(vroot) || !os.dir_exists(vroot + '/vlib/builtin') {
println('vlib not found, downloading it...')
/*
ret := os.system('git clone --depth=1 https://github.com/vlang/v .')
if ret != 0 {
println('failed to `git clone` vlib')
println('make sure you are online and have git installed')
exit(1)
}
*/
println('vlib not found. It should be next to the V executable. ')
println('Go to https://vlang.io to install V.')
exit(1)
}
// println('out_name:$out_name')
mut out_name_c := os.realpath('${out_name}.tmp.c')
cflags := get_cmdline_cflags(args)
rdir := os.realpath( dir )
rdir_name := os.filename( rdir )
obfuscate := '-obf' in args
is_repl := '-repl' in args
pref := &Preferences {
is_test: is_test
is_script: is_script
is_so: '-shared' in args
is_prod: '-prod' in args
is_verbose: '-verbose' in args || '--verbose' in args
is_debug: '-g' in args || '-cg' in args
is_vlines: '-g' in args && !('-cg' in args)
is_keep_c: '-keep_c' in args
is_cache: '-cache' in args
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is_stats: '-stats' in args
obfuscate: obfuscate
is_prof: '-prof' in args
is_live: '-live' in args
sanitize: '-sanitize' in args
nofmt: '-nofmt' in args
show_c_cmd: '-show_c_cmd' in args
translated: 'translated' in args
is_run: 'run' in args
autofree: '-autofree' in args
compress: '-compress' in args
is_repl: is_repl
build_mode: build_mode
cflags: cflags
ccompiler: find_c_compiler()
building_v: !is_repl && (rdir_name == 'compiler' || rdir_name == 'v.v' || dir.contains('vlib'))
}
if pref.is_verbose || pref.is_debug {
println('C compiler=$pref.ccompiler')
}
if pref.is_so {
out_name_c = out_name.all_after(os.path_separator) + '_shared_lib.c'
}
return &V{
os: _os
out_name: out_name
dir: dir
lang_dir: vroot
table: new_table(obfuscate)
out_name_c: out_name_c
cgen: new_cgen(out_name_c)
vroot: vroot
pref: pref
mod: mod
vgen_buf: vgen_buf
}
}
pub fn env_vflags_and_os_args() []string {
vosargs := os.getenv('VOSARGS')
if '' != vosargs { return vosargs.split(' ') }
mut args := []string
vflags := os.getenv('VFLAGS')
if '' != vflags {
args << os.args[0]
args << vflags.split(' ')
if os.args.len > 1 {
args << os.args.right(1)
}
} else{
args << os.args
}
return args
}
pub fn update_v() {
println('Updating V...')
vroot := os.dir(vexe_path())
s := os.exec('git -C "$vroot" pull --rebase origin master') or {
verror(err)
return
}
println(s.output)
$if windows {
v_backup_file := '$vroot/v_old.exe'
if os.file_exists( v_backup_file ) {
os.rm( v_backup_file )
}
os.mv('$vroot/v.exe', v_backup_file)
s2 := os.exec('"$vroot/make.bat"') or {
verror(err)
return
}
println(s2.output)
} $else {
s2 := os.exec('make -C "$vroot"') or {
verror(err)
return
}
println(s2.output)
}
}
pub fn vfmt(args[]string) {
file := args.last()
if !os.file_exists(file) {
println('"$file" does not exist')
exit(1)
}
if !file.ends_with('.v') {
println('v fmt can only be used on .v files')
exit(1)
}
println('vfmt is temporarily disabled')
}
pub fn install_v(args[]string) {
if args.len < 3 {
println('usage: v install [module] [module] [...]')
return
}
names := args.slice(2, args.len)
vexec := vexe_path()
vroot := os.dir(vexec)
vget := '$vroot/tools/vget'
if true {
//println('Building vget...')
os.chdir(vroot + '/tools')
vget_compilation := os.exec('"$vexec" -o $vget vget.v') or {
verror(err)
return
}
if vget_compilation.exit_code != 0 {
verror( vget_compilation.output )
return
}
}
vgetresult := os.exec('$vget ' + names.join(' ')) or {
verror(err)
return
}
if vgetresult.exit_code != 0 {
verror( vgetresult.output )
return
}
}
pub fn create_symlink() {
vexe := vexe_path()
link_path := '/usr/local/bin/v'
ret := os.system('ln -sf $vexe $link_path')
if ret == 0 {
println('symlink "$link_path" has been created')
} else {
println('failed to create symlink "$link_path", '+
'make sure you run with sudo')
}
}
pub fn vexe_path() string {
vexe := os.getenv('VEXE')
if '' != vexe { return vexe }
return os.executable()
}
pub fn verror(s string) {
println('V error: $s')
os.flush_stdout()
exit(1)
}
pub fn vhash() string {
mut buf := [50]byte
buf[0] = 0
C.snprintf(*char(buf), 50, '%s', C.V_COMMIT_HASH )
return tos_clone(buf)
}
pub fn cescaped_path(s string) string {
return s.replace('\\','\\\\')
}
pub fn os_from_string(os string) OS {
switch os {
case 'linux': return .linux
case 'windows': return .windows
case 'mac': return .mac
case 'freebsd': return .freebsd
case 'openbsd': return .openbsd
case 'netbsd': return .netbsd
case 'dragonfly': return .dragonfly
case 'js': return .js
case 'solaris': return .solaris
case 'android': return .android
case 'msvc':
// notice that `-os msvc` became `-cc msvc`
verror('use the flag `-cc msvc` to build using msvc')
}
println('bad os $os') // todo panic?
return .linux
}
//
pub fn set_vroot_folder(vroot_path string) {
// Preparation for the compiler module:
// VEXE env variable is needed so that compiler.vexe_path()
// can return it later to whoever needs it:
mut vname := if os.user_os() == 'windows' { 'v.exe' } else { 'v' }
os.setenv('VEXE', os.realpath( [vroot_path, vname].join(os.path_separator) ), true)
}
pub fn new_v_compiler_with_args(args []string) &V {
vexe := vexe_path()
mut allargs := [vexe]
allargs << args
os.setenv('VOSARGS', allargs.join(' '), true)
return new_v(allargs)
}