625 lines
16 KiB
V
625 lines
16 KiB
V
// Copyright (c) 2019-2021 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module os
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pub struct Result {
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pub:
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exit_code int
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output string
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// stderr string // TODO
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}
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pub const (
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args = []string{}
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max_path_len = 4096
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wd_at_startup = getwd()
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)
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const (
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f_ok = 0
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x_ok = 1
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w_ok = 2
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r_ok = 4
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)
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// cp_all will recursively copy `src` to `dst`,
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// optionally overwriting files or dirs in `dst`.
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pub fn cp_all(src string, dst string, overwrite bool) ? {
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source_path := real_path(src)
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dest_path := real_path(dst)
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if !exists(source_path) {
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return error("Source path doesn't exist")
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}
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// single file copy
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if !is_dir(source_path) {
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adjusted_path := if is_dir(dest_path) {
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join_path(dest_path, file_name(source_path))
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} else {
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dest_path
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}
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if exists(adjusted_path) {
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if overwrite {
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rm(adjusted_path) ?
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} else {
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return error('Destination file path already exist')
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}
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}
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cp(source_path, adjusted_path) ?
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return
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}
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if !exists(dest_path) {
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mkdir(dest_path) ?
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}
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if !is_dir(dest_path) {
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return error('Destination path is not a valid directory')
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}
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files := ls(source_path) ?
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for file in files {
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sp := join_path(source_path, file)
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dp := join_path(dest_path, file)
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if is_dir(sp) {
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if !exists(dp) {
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mkdir(dp) ?
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}
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}
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cp_all(sp, dp, overwrite) or {
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rmdir(dp) or { return err }
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return err
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}
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}
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}
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// mv_by_cp first copies the source file, and if it is copied successfully, deletes the source file.
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// may be used when you are not sure that the source and target are on the same mount/partition.
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pub fn mv_by_cp(source string, target string) ? {
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cp(source, target) ?
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rm(source) ?
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}
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// read_lines reads the file in `path` into an array of lines.
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pub fn read_lines(path string) ?[]string {
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buf := read_file(path) ?
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return buf.split_into_lines()
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}
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// read_ulines reads the file in `path` into an array of ustring lines.
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fn read_ulines(path string) ?[]ustring {
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lines := read_lines(path) ?
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// mut ulines := new_array(0, lines.len, sizeof(ustring))
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mut ulines := []ustring{}
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for myline in lines {
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// ulines[i] = ustr
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ulines << myline.ustring()
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}
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return ulines
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}
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// sigint_to_signal_name will translate `si` signal integer code to it's string code representation.
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pub fn sigint_to_signal_name(si int) string {
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// POSIX signals:
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match si {
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1 { return 'SIGHUP' }
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2 { return 'SIGINT' }
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3 { return 'SIGQUIT' }
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4 { return 'SIGILL' }
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6 { return 'SIGABRT' }
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8 { return 'SIGFPE' }
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9 { return 'SIGKILL' }
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11 { return 'SIGSEGV' }
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13 { return 'SIGPIPE' }
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14 { return 'SIGALRM' }
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15 { return 'SIGTERM' }
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else {}
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}
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$if linux {
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// From `man 7 signal` on linux:
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match si {
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// TODO dependent on platform
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// works only on x86/ARM/most others
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10 /* , 30, 16 */ { return 'SIGUSR1' }
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12 /* , 31, 17 */ { return 'SIGUSR2' }
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17 /* , 20, 18 */ { return 'SIGCHLD' }
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18 /* , 19, 25 */ { return 'SIGCONT' }
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19 /* , 17, 23 */ { return 'SIGSTOP' }
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20 /* , 18, 24 */ { return 'SIGTSTP' }
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21 /* , 26 */ { return 'SIGTTIN' }
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22 /* , 27 */ { return 'SIGTTOU' }
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// /////////////////////////////
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5 { return 'SIGTRAP' }
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7 { return 'SIGBUS' }
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else {}
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}
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}
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return 'unknown'
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}
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// rmdir_all recursively removes the specified directory.
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pub fn rmdir_all(path string) ? {
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mut ret_err := ''
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items := ls(path) ?
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for item in items {
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fullpath := join_path(path, item)
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if is_dir(fullpath) {
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rmdir_all(fullpath) or { ret_err = err.msg }
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} else {
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rm(fullpath) or { ret_err = err.msg }
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}
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}
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rmdir(path) or { ret_err = err.msg }
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if ret_err.len > 0 {
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return error(ret_err)
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}
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}
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// is_dir_empty will return a `bool` whether or not `path` is empty.
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pub fn is_dir_empty(path string) bool {
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items := ls(path) or { return true }
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return items.len == 0
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}
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// file_ext will return the part after the last occurence of `.` in `path`.
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// The `.` is included.
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pub fn file_ext(path string) string {
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pos := path.last_index('.') or { return '' }
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return path[pos..]
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}
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// dir returns all but the last element of path, typically the path's directory.
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// After dropping the final element, trailing slashes are removed.
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// If the path is empty, dir returns ".". If the path consists entirely of separators,
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// dir returns a single separator.
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// The returned path does not end in a separator unless it is the root directory.
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pub fn dir(path string) string {
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if path == '' {
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return '.'
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}
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pos := path.last_index(path_separator) or { return '.' }
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return path[..pos]
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}
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// base returns the last element of path.
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// Trailing path separators are removed before extracting the last element.
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// If the path is empty, base returns ".". If the path consists entirely of separators, base returns a
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// single separator.
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pub fn base(path string) string {
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if path == '' {
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return '.'
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}
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if path == path_separator {
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return path_separator
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}
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if path.ends_with(path_separator) {
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path2 := path[..path.len - 1]
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pos := path2.last_index(path_separator) or { return path2.clone() }
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return path2[pos + 1..]
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}
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pos := path.last_index(path_separator) or { return path.clone() }
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return path[pos + 1..]
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}
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// file_name will return all characters found after the last occurence of `path_separator`.
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// file extension is included.
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pub fn file_name(path string) string {
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return path.all_after_last(path_separator)
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}
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// input_opt returns a one-line string from stdin, after printing a prompt.
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// In the event of error (end of input), it returns `none`.
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pub fn input_opt(prompt string) ?string {
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print(prompt)
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flush()
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res := get_raw_line()
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if res.len > 0 {
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return res.trim_right('\r\n')
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}
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return none
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}
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// input returns a one-line string from stdin, after printing a prompt.
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// In the event of error (end of input), it returns '<EOF>'.
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pub fn input(prompt string) string {
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res := input_opt(prompt) or { return '<EOF>' }
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return res
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}
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// get_line returns a one-line string from stdin
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pub fn get_line() string {
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str := get_raw_line()
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$if windows {
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return str.trim_right('\r\n')
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}
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return str.trim_right('\n')
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}
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// get_lines returns an array of strings read from from stdin.
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// reading is stopped when an empty line is read.
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pub fn get_lines() []string {
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mut line := ''
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mut inputstr := []string{}
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for {
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line = get_line()
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if line.len <= 0 {
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break
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}
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line = line.trim_space()
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inputstr << line
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}
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return inputstr
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}
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// get_lines_joined returns a string of the values read from from stdin.
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// reading is stopped when an empty line is read.
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pub fn get_lines_joined() string {
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mut line := ''
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mut inputstr := ''
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for {
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line = get_line()
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if line.len <= 0 {
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break
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}
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line = line.trim_space()
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inputstr += line
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}
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return inputstr
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}
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// get_raw_lines_joined reads *all* input lines from stdin.
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// It returns them as one large string. NB: unlike os.get_lines_joined,
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// empty lines (that contain only `\r\n` or `\n`), will be present in
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// the output.
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// Reading is stopped, only on EOF of stdin.
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pub fn get_raw_lines_joined() string {
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mut line := ''
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mut lines := []string{}
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for {
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line = get_raw_line()
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if line.len <= 0 {
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break
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}
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lines << line
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}
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res := lines.join('')
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return res
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}
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// user_os returns current user operating system name.
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pub fn user_os() string {
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$if linux {
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return 'linux'
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}
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$if macos {
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return 'macos'
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}
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$if windows {
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return 'windows'
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}
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$if freebsd {
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return 'freebsd'
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}
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$if openbsd {
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return 'openbsd'
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}
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$if netbsd {
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return 'netbsd'
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}
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$if dragonfly {
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return 'dragonfly'
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}
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$if android {
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return 'android'
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}
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$if solaris {
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return 'solaris'
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}
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$if haiku {
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return 'haiku'
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}
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return 'unknown'
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}
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// home_dir returns path to the user's home directory.
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pub fn home_dir() string {
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$if windows {
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return getenv('USERPROFILE')
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} $else {
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// println('home_dir() call')
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// res:= os.getenv('HOME')
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// println('res="$res"')
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return getenv('HOME')
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}
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}
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// write_file writes `text` data to a file in `path`.
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pub fn write_file(path string, text string) ? {
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mut f := create(path) ?
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f.write(text.bytes()) ?
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f.close()
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}
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// write_file_array writes the data in `buffer` to a file in `path`.
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pub fn write_file_array(path string, buffer array) ? {
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mut f := create(path) ?
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unsafe { f.write_bytes_at(buffer.data, (buffer.len * buffer.element_size), 0) }
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f.close()
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}
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// executable_fallback is used when there is not a more platform specific and accurate implementation.
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// It relies on path manipulation of os.args[0] and os.wd_at_startup, so it may not work properly in
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// all cases, but it should be better, than just using os.args[0] directly.
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fn executable_fallback() string {
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if os.args.len == 0 {
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// we are early in the bootstrap, os.args has not been initialized yet :-|
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return ''
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}
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mut exepath := os.args[0]
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$if windows {
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if !exepath.contains('.exe') {
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exepath += '.exe'
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}
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}
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if !is_abs_path(exepath) {
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if exepath.contains(path_separator) {
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exepath = join_path(os.wd_at_startup, exepath)
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} else {
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// no choice but to try to walk the PATH folders :-| ...
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foundpath := find_abs_path_of_executable(exepath) or { '' }
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if foundpath.len > 0 {
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exepath = foundpath
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}
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}
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}
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exepath = real_path(exepath)
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return exepath
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}
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// find_exe_path walks the environment PATH, just like most shell do, it returns
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// the absolute path of the executable if found
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pub fn find_abs_path_of_executable(exepath string) ?string {
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if exepath == '' {
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return error('expected non empty `exepath`')
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}
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if is_abs_path(exepath) {
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return real_path(exepath)
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}
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mut res := ''
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paths := getenv('PATH').split(path_delimiter)
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for p in paths {
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found_abs_path := join_path(p, exepath)
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if exists(found_abs_path) && is_executable(found_abs_path) {
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res = found_abs_path
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break
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}
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}
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if res.len > 0 {
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return real_path(res)
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}
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return error('failed to find executable')
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}
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// exists_in_system_path returns `true` if `prog` exists in the system's PATH
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pub fn exists_in_system_path(prog string) bool {
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find_abs_path_of_executable(prog) or { return false }
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return true
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}
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// is_file returns a `bool` indicating whether the given `path` is a file.
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pub fn is_file(path string) bool {
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return exists(path) && !is_dir(path)
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}
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// is_abs_path returns `true` if `path` is absolute.
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pub fn is_abs_path(path string) bool {
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$if windows {
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return path[0] == `/` || // incase we're in MingGW bash
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(path[0].is_letter() && path[1] == `:`)
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}
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return path[0] == `/`
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}
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// join_path returns a path as string from input string parameter(s).
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[manualfree]
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pub fn join_path(base string, dirs ...string) string {
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mut result := []string{}
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result << base.trim_right('\\/')
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for d in dirs {
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result << d
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}
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res := result.join(path_separator)
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unsafe { result.free() }
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return res
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}
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// walk_ext returns a recursive list of all files in `path` ending with `ext`.
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pub fn walk_ext(path string, ext string) []string {
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if !is_dir(path) {
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return []
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}
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mut files := ls(path) or { return [] }
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mut res := []string{}
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separator := if path.ends_with(path_separator) { '' } else { path_separator }
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for file in files {
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if file.starts_with('.') {
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continue
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}
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p := path + separator + file
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if is_dir(p) && !is_link(p) {
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res << walk_ext(p, ext)
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} else if file.ends_with(ext) {
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res << p
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}
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}
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return res
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}
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// walk recursively traverses the given directory `path`.
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// When a file is encountred it will call the callback function with current file as argument.
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pub fn walk(path string, f fn (string)) {
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if !is_dir(path) {
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return
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}
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mut files := ls(path) or { return }
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mut local_path_separator := path_separator
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if path.ends_with(path_separator) {
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local_path_separator = ''
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}
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for file in files {
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p := path + local_path_separator + file
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if is_dir(p) && !is_link(p) {
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walk(p, f)
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} else if exists(p) {
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f(p)
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}
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}
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return
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}
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// log will print "os.log: "+`s` ...
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pub fn log(s string) {
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//$if macos {
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// Use NSLog() on macos
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// C.darwin_log(s)
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//} $else {
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println('os.log: ' + s)
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//}
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}
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// mkdir_all will create a valid full path of all directories given in `path`.
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pub fn mkdir_all(path string) ? {
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mut p := if path.starts_with(path_separator) { path_separator } else { '' }
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path_parts := path.trim_left(path_separator).split(path_separator)
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for subdir in path_parts {
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p += subdir + path_separator
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if exists(p) && is_dir(p) {
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continue
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}
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mkdir(p) or { return error('folder: $p, error: $err') }
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}
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}
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// cache_dir returns the path to a *writable* user specific folder, suitable for writing non-essential data.
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pub fn cache_dir() string {
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// See: https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
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// There is a single base directory relative to which user-specific non-essential
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// (cached) data should be written. This directory is defined by the environment
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// variable $XDG_CACHE_HOME.
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// $XDG_CACHE_HOME defines the base directory relative to which user specific
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// non-essential data files should be stored. If $XDG_CACHE_HOME is either not set
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// or empty, a default equal to $HOME/.cache should be used.
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$if !windows {
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xdg_cache_home := getenv('XDG_CACHE_HOME')
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if xdg_cache_home != '' {
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return xdg_cache_home
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}
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}
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cdir := join_path(home_dir(), '.cache')
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if !is_dir(cdir) && !is_link(cdir) {
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mkdir(cdir) or { panic(err) }
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}
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return cdir
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}
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// temp_dir returns the path to a folder, that is suitable for storing temporary files.
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pub fn temp_dir() string {
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mut path := getenv('TMPDIR')
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$if windows {
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if path == '' {
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// TODO see Qt's implementation?
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// https://doc.qt.io/qt-5/qdir.html#tempPath
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// https://github.com/qt/qtbase/blob/e164d61ca8263fc4b46fdd916e1ea77c7dd2b735/src/corelib/io/qfilesystemengine_win.cpp#L1275
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path = getenv('TEMP')
|
|
if path == '' {
|
|
path = getenv('TMP')
|
|
}
|
|
if path == '' {
|
|
path = 'C:/tmp'
|
|
}
|
|
}
|
|
}
|
|
$if android {
|
|
// TODO test+use '/data/local/tmp' on Android before using cache_dir()
|
|
if path == '' {
|
|
path = cache_dir()
|
|
}
|
|
}
|
|
if path == '' {
|
|
path = '/tmp'
|
|
}
|
|
return path
|
|
}
|
|
|
|
fn default_vmodules_path() string {
|
|
return join_path(home_dir(), '.vmodules')
|
|
}
|
|
|
|
// vmodules_dir returns the path to a folder, where v stores its global modules.
|
|
pub fn vmodules_dir() string {
|
|
paths := vmodules_paths()
|
|
if paths.len > 0 {
|
|
return paths[0]
|
|
}
|
|
return default_vmodules_path()
|
|
}
|
|
|
|
// vmodules_paths returns a list of paths, where v looks up for modules.
|
|
// You can customize it through setting the environment variable VMODULES
|
|
pub fn vmodules_paths() []string {
|
|
mut path := getenv('VMODULES')
|
|
if path == '' {
|
|
path = default_vmodules_path()
|
|
}
|
|
list := path.split(path_delimiter).map(it.trim_right(path_separator))
|
|
return list
|
|
}
|
|
|
|
// 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.
|
|
[manualfree]
|
|
pub fn resource_abs_path(path string) string {
|
|
exe := executable()
|
|
dexe := dir(exe)
|
|
mut base_path := real_path(dexe)
|
|
vresource := getenv('V_RESOURCE_PATH')
|
|
if vresource.len != 0 {
|
|
base_path = vresource
|
|
}
|
|
fp := join_path(base_path, path)
|
|
res := real_path(fp)
|
|
unsafe {
|
|
fp.free()
|
|
base_path.free()
|
|
}
|
|
return res
|
|
}
|
|
|
|
pub struct Uname {
|
|
pub mut:
|
|
sysname string
|
|
nodename string
|
|
release string
|
|
version string
|
|
machine string
|
|
}
|
|
|
|
[deprecated: 'use os.execute or os.execute_or_panic instead']
|
|
pub fn exec(cmd string) ?Result {
|
|
res := execute(cmd)
|
|
if res.exit_code < 0 {
|
|
return error_with_code(res.output, -1)
|
|
}
|
|
return res
|
|
}
|
|
|
|
pub fn execute_or_panic(cmd string) Result {
|
|
res := execute(cmd)
|
|
if res.exit_code != 0 {
|
|
eprintln('failed cmd: $cmd')
|
|
eprintln('failed code: $res.exit_code')
|
|
panic(res.output)
|
|
}
|
|
return res
|
|
}
|