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// Copyright (c) 2019-2020 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 os
import filepath
#include <sys/stat.h> // #include <signal.h>
#include <errno.h>
/*
struct dirent {
d_ino int
d_off int
d_reclen u16
d_type byte
d_name [256]byte
}
*/
struct C.dirent {
d_name byteptr
}
fn C.readdir(voidptr) C.dirent
pub const (
args = []string
MAX_PATH = 4096
)
pub struct File {
cfile voidptr // Using void* instead of FILE*
pub:
fd int
mut:
opened bool
}
struct FileInfo {
name string
size int
}
struct C.stat {
st_size int
st_mode u32
st_mtime int
}
struct C.DIR {}
// struct C.dirent {
// d_name byteptr
// }
struct C.sigaction {
mut:
sa_mask int
sa_sigaction int
sa_flags int
}
fn C.getline(voidptr, voidptr, voidptr) int
fn C.ftell(fp voidptr) int
fn C.getenv(byteptr) &char
fn C.sigaction(int, voidptr, int)
fn C.open(charptr, int, int) int
fn C.fdopen(int, string) voidptr
pub fn (f File) is_opened() bool {
return f.opened
}
// read_bytes reads an amount of bytes from the beginning of the file
pub fn (f &File) read_bytes(size int) []byte {
return f.read_bytes_at(size, 0)
}
// read_bytes_at reads an amount of bytes at the given position in the file
pub fn (f &File) read_bytes_at(size, pos int) []byte {
mut arr := [`0`].repeat(size)
C.fseek(f.cfile, pos, C.SEEK_SET)
nreadbytes := C.fread(arr.data, 1, size, f.cfile)
C.fseek(f.cfile, 0, C.SEEK_SET)
return arr[0..nreadbytes]
}
pub fn read_bytes(path string) ?[]byte {
mut fp := vfopen(path, 'rb')
if isnil(fp) {
return error('failed to open file "$path"')
}
C.fseek(fp, 0, C.SEEK_END)
fsize := C.ftell(fp)
C.rewind(fp)
mut res := [`0`].repeat(fsize)
nr_read_elements := C.fread(res.data, fsize, 1, fp)
C.fclose(fp)
return res[0..nr_read_elements * fsize]
}
// read_file reads the file in `path` and returns the contents.
pub fn read_file(path string) ?string {
mode := 'rb'
mut fp := vfopen(path, mode)
if isnil(fp) {
return error('failed to open file "$path"')
}
defer { C.fclose(fp) }
C.fseek(fp, 0, C.SEEK_END)
fsize := C.ftell(fp)
// C.fseek(fp, 0, SEEK_SET) // same as `C.rewind(fp)` below
C.rewind(fp)
mut str := &byte(0)
unsafe { str = malloc(fsize + 1) }
C.fread(str, fsize, 1, fp)
str[fsize] = 0
return string(str,fsize)
}
// file_size returns the size of the file located in `path`.
pub fn file_size(path string) int {
mut s := C.stat{}
$if windows {
C._wstat(path.to_wide(), voidptr(&s))
} $else {
C.stat(charptr(path.str), &s)
}
return s.st_size
}
pub fn mv(old, new string) {
$if windows {
C._wrename(old.to_wide(), new.to_wide())
} $else {
C.rename(charptr(old.str), charptr(new.str))
}
}
fn C.CopyFile(&u32, &u32, int) int
// TODO implement actual cp for linux
pub fn cp(old, new string) ?bool {
$if windows {
_old := old.replace('/', '\\')
_new := new.replace('/', '\\')
C.CopyFile(_old.to_wide(), _new.to_wide(), false)
result := C.GetLastError()
if result == 0 {
return true
}
else {
return error_with_code('failed to copy $old to $new', int(result))
}
} $else {
os.system('cp $old $new')
return true // TODO make it return true or error when cp for linux is implemented
}
}
pub fn cp_r(osource_path, odest_path string, overwrite bool) ?bool {
source_path := os.realpath(osource_path)
dest_path := os.realpath(odest_path)
if !os.exists(source_path) {
return error("Source path doesn\'t exist")
}
// single file copy
if !os.is_dir(source_path) {
adjasted_path := if os.is_dir(dest_path) { filepath.join(dest_path,filepath.filename(source_path)) } else { dest_path }
if os.exists(adjasted_path) {
if overwrite {
os.rm(adjasted_path)
}
else {
return error('Destination file path already exist')
}
}
os.cp(source_path, adjasted_path) or {
return error(err)
}
return true
}
if !os.is_dir(dest_path) {
return error('Destination path is not a valid directory')
}
files := os.ls(source_path) or {
return error(err)
}
for file in files {
sp := filepath.join(source_path,file)
dp := filepath.join(dest_path,file)
if os.is_dir(sp) {
os.mkdir(dp) or {
panic(err)
}
}
cp_r(sp, dp, overwrite) or {
os.rmdir(dp)
panic(err)
}
}
return true
}
// mv_by_cp first copies the source file, and if it is copied successfully, deletes the source file.
// mv_by_cp may be used when you are not sure that the source and target are on the same mount/partition.
pub fn mv_by_cp(source string, target string) ?bool {
os.cp(source, target) or {
return error(err)
}
os.rm(source)
return true
}
fn vfopen(path, mode string) *C.FILE {
$if windows {
return C._wfopen(path.to_wide(), mode.to_wide())
} $else {
return C.fopen(charptr(path.str), charptr(mode.str))
}
}
// read_lines reads the file in `path` into an array of lines.
pub fn read_lines(path string) ?[]string {
buf := read_file(path) or {
return err
}
return buf.split_into_lines()
}
fn read_ulines(path string) ?[]ustring {
lines := read_lines(path) or {
return err
}
// mut ulines := new_array(0, lines.len, sizeof(ustring))
mut ulines := []ustring
for myline in lines {
// ulines[i] = ustr
ulines << myline.ustring()
}
return ulines
}
pub fn open_append(path string) ?File {
mut file := File{}
$if windows {
wpath := path.replace('/', '\\').to_wide()
mode := 'ab'
file = File{
cfile: C._wfopen(wpath, mode.to_wide())
}
} $else {
cpath := path.str
file = File{
cfile: C.fopen(charptr(cpath), 'ab')
}
}
if isnil(file.cfile) {
return error('failed to create(append) file "$path"')
}
file.opened = true
return file
}
// open_file can be used to open or create a file with custom flags and permissions and returns a `File` object
pub fn open_file(path string, mode string, options ...int) ?File {
mut flags := 0
for m in mode {
match m {
`r` { flags |= O_RDONLY }
`w` { flags |= O_CREATE | O_TRUNC }
`a` { flags |= O_CREATE | O_APPEND }
`s` { flags |= O_SYNC }
`n` { flags |= O_NONBLOCK }
`c` { flags |= O_NOCTTY }
`+` { flags |= O_RDWR }
else {}
}
}
mut permission := 0666
if options.len > 0 {
permission = options[0]
}
$if windows {
if permission < 0600 {
permission = 0x0100
}
else {
permission = 0x0100 | 0x0080
}
}
mut p := path
$if windows {
p = path.replace('/', '\\')
}
fd := C.open(charptr(p.str), flags, permission)
if fd == -1 {
return error(posix_get_error_msg(C.errno))
}
cfile := C.fdopen(fd, charptr(mode.str))
if isnil(cfile) {
return error('Failed to open or create file "$path"')
}
return File{
cfile: cfile
fd: fd
opened: true
}
}
/*
pub fn (f mut File) write_bytes_at(data voidptr, size, pos int) {
$if linux {
}
$else {
C.fseek(f.cfile, pos, C.SEEK_SET)
C.fwrite(data, 1, size, f.cfile)
C.fseek(f.cfile, 0, C.SEEK_END)
}
}
*/
pub fn (f mut File) flush() {
if !f.opened {
return
}
C.fflush(f.cfile)
}
// system starts the specified command, waits for it to complete, and returns its code.
fn vpopen(path string) voidptr {
// *C.FILE {
$if windows {
mode := 'rb'
wpath := path.to_wide()
return C._wpopen(wpath, mode.to_wide())
} $else {
cpath := path.str
return C.popen(cpath, 'r')
}
}
fn posix_wait4_to_exit_status(waitret int) (int,bool) {
$if windows {
return waitret,false
} $else {
mut ret := 0
mut is_signaled := true
// (see man system, man 2 waitpid: C macro WEXITSTATUS section)
if C.WIFEXITED(waitret) {
ret = C.WEXITSTATUS(waitret)
is_signaled = false
}
else if C.WIFSIGNALED(waitret) {
ret = C.WTERMSIG(waitret)
is_signaled = true
}
return ret,is_signaled
}
}
// posix_get_error_msg return error code representation in string.
pub fn posix_get_error_msg(code int) string {
ptr_text := C.strerror(code) // voidptr?
if ptr_text == 0 {
return ''
}
return tos3(ptr_text)
}
fn vpclose(f voidptr) int {
$if windows {
return C._pclose(f)
} $else {
ret,_ := posix_wait4_to_exit_status(C.pclose(f))
return ret
}
}
pub struct Result {
pub:
exit_code int
output string
// stderr string // TODO
}
// `system` works like `exec()`, but only returns a return code.
pub fn system(cmd string) int {
// if cmd.contains(';') || cmd.contains('&&') || cmd.contains('||') || cmd.contains('\n') {
// TODO remove panic
// panic(';, &&, || and \\n are not allowed in shell commands')
// }
mut ret := 0
$if windows {
// overcome bug in system & _wsystem (cmd) when first char is quote `"`
wcmd := if cmd.len > 1 && cmd[0] == `"` && cmd[1] != `"` { '"$cmd"' } else { cmd }
ret = C._wsystem(wcmd.to_wide())
} $else {
ret = C.system(cmd.str)
}
if ret == -1 {
print_c_errno()
}
$if !windows {
pret,is_signaled := posix_wait4_to_exit_status(ret)
if is_signaled {
println('Terminated by signal ${ret:2d} (' + sigint_to_signal_name(pret) + ')')
}
ret = pret
}
return ret
}
pub fn sigint_to_signal_name(si int) string {
// POSIX signals:
match si {
1 {
return 'SIGHUP'
}
2 {
return 'SIGINT'
}
3 {
return 'SIGQUIT'
}
4 {
return 'SIGILL'
}
6 {
return 'SIGABRT'
}
8 {
return 'SIGFPE'
}
9 {
return 'SIGKILL'
}
11 {
return 'SIGSEGV'
}
13 {
return 'SIGPIPE'
}
14 {
return 'SIGALRM'
}
15 {
return 'SIGTERM'
}
else {}
}
$if linux {
// From `man 7 signal` on linux:
match si {
30, 10, 16 {
return 'SIGUSR1'
}
31, 12, 17 {
return 'SIGUSR2'
}
20, 17, 18 {
return 'SIGCHLD'
}
19, 18, 25 {
return 'SIGCONT'
}
17, 19, 23 {
return 'SIGSTOP'
}
18, 20, 24 {
return 'SIGTSTP'
}
21, 21, 26 {
return 'SIGTTIN'
}
22, 22, 27 {
return 'SIGTTOU'
}
// /////////////////////////////
5 {
return 'SIGTRAP'
}
7 {
return 'SIGBUS'
}
else {}
}
}
return 'unknown'
}
// `getenv` returns the value of the environment variable named by the key.
pub fn getenv(key string) string {
$if windows {
s := C._wgetenv(key.to_wide())
if s == 0 {
return ''
}
return string_from_wide(s)
} $else {
s := C.getenv(key.str)
if s == 0 {
return ''
}
// NB: C.getenv *requires* that the result be copied.
return cstring_to_vstring(byteptr(s))
}
}
pub fn setenv(name string, value string, overwrite bool) int {
$if windows {
format := '$name=$value'
if overwrite {
return C._putenv(format.str)
}
return -1
} $else {
return C.setenv(name.str, value.str, overwrite)
}
}
pub fn unsetenv(name string) int {
$if windows {
format := '${name}='
return C._putenv(format.str)
} $else {
return C.unsetenv(name.str)
}
}
const (
F_OK = 0
X_OK = 1
W_OK = 2
R_OK = 4
)
// exists returns true if `path` exists.
pub fn exists(path string) bool {
$if windows {
p := path.replace('/', '\\')
return C._waccess(p.to_wide(), F_OK) != -1
} $else {
return C.access(path.str, F_OK) != -1
}
}
// `is_executable` returns `true` if `path` is executable.
pub fn is_executable(path string) bool {
$if windows {
// NB: https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/access-waccess?view=vs-2019
// i.e. there is no X bit there, the modes can be:
// 00 Existence only
// 02 Write-only
// 04 Read-only
// 06 Read and write
p := os.realpath( path )
return ( os.exists( p ) && p.ends_with('.exe') )
} $else {
return C.access(path.str, X_OK) != -1
}
}
// `is_writable` returns `true` if `path` is writable.
pub fn is_writable(path string) bool {
$if windows {
p := path.replace('/', '\\')
return C._waccess(p.to_wide(), W_OK) != -1
} $else {
return C.access(path.str, W_OK) != -1
}
}
// `is_readable` returns `true` if `path` is readable.
pub fn is_readable(path string) bool {
$if windows {
p := path.replace('/', '\\')
return C._waccess(p.to_wide(), R_OK) != -1
} $else {
return C.access(path.str, R_OK) != -1
}
}
[deprecated]
pub fn file_exists(_path string) bool {
panic('use os.exists(path) instead of os.file_exists(path)')
}
// rm removes file in `path`.
pub fn rm(path string) {
$if windows {
C._wremove(path.to_wide())
} $else {
C.remove(path.str)
}
// C.unlink(path.cstr())
}
// rmdir removes a specified directory.
pub fn rmdir(path string) {
$if !windows {
C.rmdir(path.str)
} $else {
C.RemoveDirectory(path.to_wide())
}
}
pub fn rmdir_recursive(path string) {
items := os.ls(path) or {
panic(err)
}
for item in items {
if os.is_dir(filepath.join(path,item)) {
rmdir_recursive(filepath.join(path,item))
}
os.rm(filepath.join(path,item))
}
os.rmdir(path)
}
pub fn is_dir_empty(path string) bool {
items := os.ls(path) or {
panic(err)
}
return items.len == 0
}
fn print_c_errno() {
e := C.errno
se := tos_clone(byteptr(C.strerror(C.errno)))
println('errno=$e err=$se')
}
[deprecated]
pub fn ext(path string) string {
println('Use filepath.ext')
return filepath.ext(path)
}
[deprecated]
pub fn dir(path string) string {
println('Use filepath.dir')
return filepath.dir(path)
}
[deprecated]
pub fn basedir(path string) string {
println('Use filepath.basedir')
return filepath.basedir(path)
}
[deprecated]
pub fn filename(path string) string {
println('Use filepath.filename')
return filepath.filename(path)
}
// get_line returns a one-line string from stdin
pub fn get_line() string {
str := get_raw_line()
$if windows {
return str.trim_right('\r\n')
} $else {
return str.trim_right('\n')
}
}
// get_raw_line returns a one-line string from stdin along with '\n' if there is any
pub fn get_raw_line() string {
$if windows {
max_line_chars := 256
buf := malloc(max_line_chars * 2)
h_input := C.GetStdHandle(STD_INPUT_HANDLE)
mut bytes_read := 0
if is_atty(0) > 0 {
C.ReadConsole(h_input, buf, max_line_chars * 2, &bytes_read, 0)
return string_from_wide2(&u16(buf), bytes_read)
}
mut offset := 0
for {
pos := buf + offset
res := C.ReadFile(h_input, pos, 1, &bytes_read, 0)
if !res || bytes_read == 0 {
break
}
if *pos == `\n` || *pos == `\r` {
offset++
break
}
offset++
}
return string(buf, offset)
} $else {
max := size_t(0)
mut buf := byteptr(0)
nr_chars := C.getline(&buf, &max, stdin)
defer { unsafe{ free(buf) } }
if nr_chars == 0 || nr_chars == -1 {
return ''
}
res := tos_clone( buf )
return res
}
}
pub fn get_lines() []string {
mut line := ''
mut inputstr := []string
for {
line = get_line()
if (line.len <= 0) {
break
}
line = line.trim_space()
inputstr << line
}
return inputstr
}
pub fn get_lines_joined() string {
mut line := ''
mut inputstr := ''
for {
line = get_line()
if line.len <= 0 {
break
}
line = line.trim_space()
inputstr += line
}
return inputstr
}
// user_os returns current user operating system name.
pub fn user_os() string {
$if linux {
return 'linux'
}
$if macos {
return 'mac'
}
$if windows {
return 'windows'
}
$if freebsd {
return 'freebsd'
}
$if openbsd {
return 'openbsd'
}
$if netbsd {
return 'netbsd'
}
$if dragonfly {
return 'dragonfly'
}
$if android {
return 'android'
}
$if solaris {
return 'solaris'
}
$if haiku {
return 'haiku'
}
return 'unknown'
}
// home_dir returns path to user's home directory.
pub fn home_dir() string {
mut home := os.getenv('HOME')
$if windows {
home = os.getenv('HOMEDRIVE')
if home.len == 0 {
home = os.getenv('SYSTEMDRIVE')
}
mut homepath := os.getenv('HOMEPATH')
if homepath.len == 0 {
homepath = '\\Users\\' + os.getenv('USERNAME')
}
home += homepath
}
home += path_separator
return home
}
// write_file writes `text` data to a file in `path`.
pub fn write_file(path, text string) {
mut f := os.create(path) or {
return
}
f.write(text)
f.close()
}
// clear clears current terminal screen.
pub fn clear() {
$if !windows {
C.printf('\x1b[2J')
C.printf('\x1b[H')
}
}
pub fn on_segfault(f voidptr) {
$if windows {
return
}
$if macos {
mut sa := C.sigaction{}
C.memset(&sa, 0, sizeof(sigaction))
C.sigemptyset(&sa.sa_mask)
sa.sa_sigaction = f
sa.sa_flags = C.SA_SIGINFO
C.sigaction(C.SIGSEGV, &sa, 0)
}
}
fn C.getpid() int
fn C.proc_pidpath(int, byteptr, int) int
fn C.readlink() int
// executable returns the path name of the executable that started the current
// process.
pub fn executable() string {
$if linux {
mut result := calloc(MAX_PATH)
count := C.readlink('/proc/self/exe', result, MAX_PATH)
if count < 0 {
eprintln('os.executable() failed at reading /proc/self/exe to get exe path')
return os.args[0]
}
return string(result)
}
$if windows {
max := 512
mut result := &u16(calloc(max * 2)) // MAX_PATH * sizeof(wchar_t)
len := C.GetModuleFileName(0, result, max)
return string_from_wide2(result, len)
}
$if macos {
mut result := calloc(MAX_PATH)
pid := C.getpid()
ret := proc_pidpath(pid, result, MAX_PATH)
if ret <= 0 {
eprintln('os.executable() failed at calling proc_pidpath with pid: $pid . proc_pidpath returned $ret ')
return os.args[0]
}
return string(result)
}
$if freebsd {
mut result := calloc(MAX_PATH)
mib := [1/* CTL_KERN */, 14/* KERN_PROC */, 12/* KERN_PROC_PATHNAME */, -1]
size := MAX_PATH
C.sysctl(mib.data, 4, result, &size, 0, 0)
return string(result)
}
$if openbsd {
// "Sadly there is no way to get the full path of the executed file in OpenBSD."
// lol
return os.args[0]
}
$if solaris {}
$if haiku {}
$if netbsd {
mut result := calloc(MAX_PATH)
count := C.readlink('/proc/curproc/exe', result, MAX_PATH)
if count < 0 {
eprintln('os.executable() failed at reading /proc/curproc/exe to get exe path')
return os.args[0]
}
return string(result,count)
}
$if dragonfly {
mut result := calloc(MAX_PATH)
count := C.readlink('/proc/curproc/file', result, MAX_PATH)
if count < 0 {
eprintln('os.executable() failed at reading /proc/curproc/file to get exe path')
return os.args[0]
}
return string(result,count)
}
return os.args[0]
}
[deprecated]
pub fn dir_exists(path string) bool {
panic('use os.is_dir()')
// return false
}
// is_dir returns a boolean indicating whether the given path is a directory.
pub fn is_dir(path string) bool {
$if windows {
_path := path.replace('/', '\\')
attr := C.GetFileAttributesW(_path.to_wide())
if attr == u32(C.INVALID_FILE_ATTRIBUTES) {
return false
}
if int(attr) & C.FILE_ATTRIBUTE_DIRECTORY != 0 {
return true
}
return false
} $else {
statbuf := C.stat{}
if C.stat(path.str, &statbuf) != 0 {
return false
}
// ref: https://code.woboq.org/gcc/include/sys/stat.h.html
return int(statbuf.st_mode) & S_IFMT == S_IFDIR
}
}
// is_link returns a boolean indicating whether the given path is a link.
pub fn is_link(path string) bool {
$if windows {
return false // TODO
} $else {
statbuf := C.stat{}
if C.lstat(path.str, &statbuf) != 0 {
return false
}
return int(statbuf.st_mode) & S_IFMT == S_IFLNK
}
}
// chdir changes the current working directory to the new directory path.
pub fn chdir(path string) {
$if windows {
C._wchdir(path.to_wide())
} $else {
C.chdir(path.str)
}
}
// getwd returns the absolute path name of the current directory.
pub fn getwd() string {
$if windows {
max := 512 // MAX_PATH * sizeof(wchar_t)
buf := &u16(calloc(max * 2))
if C._wgetcwd(buf, max) == 0 {
return ''
}
return string_from_wide(buf)
} $else {
buf := calloc(512)
if C.getcwd(buf, 512) == 0 {
return ''
}
return string(buf)
}
}
// Returns the full absolute path for fpath, with all relative ../../, symlinks and so on resolved.
// See http://pubs.opengroup.org/onlinepubs/9699919799/functions/realpath.html
// Also https://insanecoding.blogspot.com/2007/11/pathmax-simply-isnt.html
// and https://insanecoding.blogspot.com/2007/11/implementing-realpath-in-c.html
// NB: this particular rabbit hole is *deep* ...
pub fn realpath(fpath string) string {
mut fullpath := calloc(MAX_PATH)
mut ret := charptr(0)
$if windows {
ret = C._fullpath(fullpath, fpath.str, MAX_PATH)
if ret == 0 {
return fpath
}
} $else {
ret = C.realpath(fpath.str, fullpath)
if ret == 0 {
return fpath
}
}
return string(fullpath)
}
// walk_ext returns a recursive list of all file paths ending with `ext`.
pub fn walk_ext(path, ext string) []string {
if !os.is_dir(path) {
return []
}
mut files := os.ls(path) or {
panic(err)
}
mut res := []string
separator := if path.ends_with(path_separator) { '' } else { path_separator }
for i, file in files {
if file.starts_with('.') {
continue
}
p := path + separator + file
if os.is_dir(p) && !os.is_link(p) {
res << walk_ext(p, ext)
}
else if file.ends_with(ext) {
res << p
}
}
return res
}
// walk recursively traverse the given directory path.
// When a file is encountred it will call the callback function with current file as argument.
pub fn walk(path string, fnc fn(path string)) {
if !os.is_dir(path) {
return
}
mut files := os.ls(path) or {
panic(err)
}
for file in files {
p := path + os.path_separator + file
if os.is_dir(p) && !os.is_link(p) {
walk(p, fnc)
}
else if os.exists(p) {
fnc(p)
}
}
return
}
pub fn signal(signum int, handler voidptr) {
C.signal(signum, handler)
}
fn C.fork() int
fn C.wait() int
pub fn fork() int {
mut pid := -1
$if !windows {
pid = C.fork()
}
$if windows {
panic('os.fork not supported in windows') // TODO
}
return pid
}
pub fn wait() int {
mut pid := -1
$if !windows {
pid = C.wait(0)
}
$if !windows {
panic('os.wait not supported in windows') // TODO
}
return pid
}
pub fn file_last_mod_unix(path string) int {
attr := C.stat{}
// # struct stat attr;
C.stat(path.str, &attr)
// # stat(path.str, &attr);
return attr.st_mtime
// # return attr.st_mtime ;
}
pub fn log(s string) {
println('os.log: ' + s)
}
pub fn flush_stdout() {
C.fflush(stdout)
}
pub fn mkdir_all(path string) {
mut p := if path.starts_with(os.path_separator) { os.path_separator } else { '' }
for subdir in path.split(os.path_separator) {
p += subdir + os.path_separator
if !os.is_dir(p) {
os.mkdir(p) or {
panic(err)
}
}
}
}
pub fn join(base string, dirs ...string) string {
println('use filepath.join')
return filepath.join(base,dirs)
}
// cachedir returns the path to a *writable* user specific folder, suitable for writing non-essential data.
pub fn cachedir() string {
// See: https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
// There is a single base directory relative to which user-specific non-essential
// (cached) data should be written. This directory is defined by the environment
// variable $XDG_CACHE_HOME.
// $XDG_CACHE_HOME defines the base directory relative to which user specific
// non-essential data files should be stored. If $XDG_CACHE_HOME is either not set
// or empty, a default equal to $HOME/.cache should be used.
$if !windows {
xdg_cache_home := os.getenv('XDG_CACHE_HOME')
if xdg_cache_home != '' {
return xdg_cache_home
}
}
cdir := os.home_dir() + '.cache'
if !os.is_dir(cdir) && !os.is_link(cdir) {
os.mkdir(cdir) or {
panic(err)
}
}
return cdir
}
// tmpdir returns the path to a folder, that is suitable for storing temporary files
pub fn tmpdir() string {
mut path := os.getenv('TMPDIR')
$if windows {
if path == '' {
// TODO see Qt's implementation?
// https://doc.qt.io/qt-5/qdir.html#tempPath
// https://github.com/qt/qtbase/blob/e164d61ca8263fc4b46fdd916e1ea77c7dd2b735/src/corelib/io/qfilesystemengine_win.cpp#L1275
path = os.getenv('TEMP')
if path == '' {
path = os.getenv('TMP')
}
if path == '' {
path = 'C:/tmp'
}
}
}
if path == '' {
path = os.cachedir()
}
if path == '' {
path = '/tmp'
}
return path
}
pub fn chmod(path string, mode int) {
C.chmod(path.str, mode)
}
pub const (
wd_at_startup = getwd()
)
// resource_abs_path returns an absolute path, for the given `path`
// (the path is expected to be relative to the executable program)
// See https://discordapp.com/channels/592103645835821068/592294828432424960/630806741373943808
// It gives a convenient way to access program resources like images, fonts, sounds and so on,
// *no matter* how the program was started, and what is the current working directory.
pub fn resource_abs_path(path string) string {
mut base_path := os.realpath(filepath.dir(os.executable()))
vresource := os.getenv('V_RESOURCE_PATH')
if vresource.len != 0 {
base_path = vresource
}
return os.realpath( filepath.join( base_path, path ) )
}
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