748 lines
19 KiB
V
748 lines
19 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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import strings
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pub const max_path_len = 4096
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pub const wd_at_startup = getwd()
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const f_ok = 0
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const x_ok = 1
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const w_ok = 2
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const r_ok = 4
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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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[unsafe]
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pub fn (mut result Result) free() {
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unsafe { result.output.free() }
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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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fname := file_name(source_path)
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join_path_single(dest_path, fname)
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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_single(source_path, file)
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dp := join_path_single(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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[manualfree]
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pub fn read_lines(path string) ?[]string {
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buf := read_file(path) ?
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res := buf.split_into_lines()
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unsafe { buf.free() }
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return res
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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_single(path, item)
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if is_dir(fullpath) && !is_link(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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[manualfree]
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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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res := items.len == 0
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unsafe { items.free() }
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return res
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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(opath string) string {
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if opath == '' {
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return '.'
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}
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path := opath.replace_each(['/', path_separator, r'\', path_separator])
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pos := path.last_index(path_separator) or { return '.' }
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if pos == 0 && path_separator == '/' {
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return '/'
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}
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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(opath string) string {
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if opath == '' {
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return '.'
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}
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path := opath.replace_each(['/', path_separator, r'\', path_separator])
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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(opath string) string {
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path := opath.replace_each(['/', path_separator, r'\', path_separator])
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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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$if serenity {
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return 'serenity'
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}
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$if vinix {
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return 'vinix'
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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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// expand_tilde_to_home expands the character `~` in `path` to the user's home directory.
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// See also `home_dir()`.
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pub fn expand_tilde_to_home(path string) string {
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if path == '~' {
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return home_dir().trim_right(path_separator)
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}
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if path.starts_with('~' + path_separator) {
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return path.replace_once('~' + path_separator, home_dir().trim_right(path_separator) +
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path_separator)
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}
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return path
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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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unsafe { f.write_full_buffer(text.str, usize(text.len)) ? }
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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 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 := 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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rexepath := exepath.replace_each(['/', path_separator, r'\', path_separator])
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if rexepath.contains(path_separator) {
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exepath = join_path_single(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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pub struct ErrExecutableNotFound {
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msg string = 'os: failed to find executable'
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code int
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}
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fn error_failed_to_find_executable() IError {
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return IError(&ErrExecutableNotFound{})
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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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path := getenv('PATH')
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paths := path.split(path_delimiter)
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for p in paths {
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found_abs_path := join_path_single(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 path.len == 0 {
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return false
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}
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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.len > 1 && 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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// TODO: fix freeing of `dirs` when the passed arguments are variadic,
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// but do not free the arr, when `os.join_path(base, ...arr)` is called.
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mut sb := strings.new_builder(base.len + dirs.len * 50)
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defer {
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unsafe { sb.free() }
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}
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sbase := base.trim_right('\\/')
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defer {
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unsafe { sbase.free() }
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}
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sb.write_string(sbase)
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for d in dirs {
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sb.write_string(path_separator)
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sb.write_string(d)
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}
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return sb.str()
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}
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|
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// join_path_single appends the `elem` after `base`, using a platform specific
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// path_separator.
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[manualfree]
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pub fn join_path_single(base string, elem string) string {
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// TODO: deprecate this and make it `return os.join_path(base, elem)`,
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// when freeing variadic args vs ...arr is solved in the compiler
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mut sb := strings.new_builder(base.len + elem.len + 1)
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defer {
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unsafe { sb.free() }
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}
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sbase := base.trim_right('\\/')
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defer {
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unsafe { sbase.free() }
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}
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sb.write_string(sbase)
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sb.write_string(path_separator)
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sb.write_string(elem)
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return sb.str()
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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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mut res := []string{}
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impl_walk_ext(path, ext, mut res)
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return res
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}
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fn impl_walk_ext(path string, ext string, mut out []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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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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impl_walk_ext(p, ext, mut out)
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} else if file.ends_with(ext) {
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out << p
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}
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}
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}
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|
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// walk traverses the given directory `path`.
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// When a file is encountred it will call the
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// callback function `f` with current file as argument.
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pub fn walk(path string, f fn (string)) {
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if path.len == 0 {
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return
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}
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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)
|
|
} else if exists(p) {
|
|
f(p)
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
// FnWalkContextCB is used to define the callback functions, passed to os.walk_context
|
|
pub type FnWalkContextCB = fn (voidptr, string)
|
|
|
|
// walk_with_context traverses the given directory `path`.
|
|
// For each encountred file, it will call your `fcb` callback,
|
|
// passing it the arbitrary `context` in its first parameter,
|
|
// and the path to the file in its second parameter.
|
|
pub fn walk_with_context(path string, context voidptr, fcb FnWalkContextCB) {
|
|
if path.len == 0 {
|
|
return
|
|
}
|
|
if !is_dir(path) {
|
|
return
|
|
}
|
|
mut files := ls(path) or { return }
|
|
mut local_path_separator := path_separator
|
|
if path.ends_with(path_separator) {
|
|
local_path_separator = ''
|
|
}
|
|
for file in files {
|
|
p := path + local_path_separator + file
|
|
if is_dir(p) && !is_link(p) {
|
|
walk_with_context(p, context, fcb)
|
|
} else {
|
|
fcb(context, p)
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
// log will print "os.log: "+`s` ...
|
|
pub fn log(s string) {
|
|
println('os.log: ' + s)
|
|
}
|
|
|
|
// mkdir_all will create a valid full path of all directories given in `path`.
|
|
pub fn mkdir_all(opath string) ? {
|
|
path := opath.replace('/', path_separator)
|
|
mut p := if path.starts_with(path_separator) { path_separator } else { '' }
|
|
path_parts := path.trim_left(path_separator).split(path_separator)
|
|
for subdir in path_parts {
|
|
p += subdir + path_separator
|
|
if exists(p) && is_dir(p) {
|
|
continue
|
|
}
|
|
mkdir(p) or { return error('folder: $p, error: $err') }
|
|
}
|
|
}
|
|
|
|
// cache_dir returns the path to a *writable* user specific folder, suitable for writing non-essential data.
|
|
pub fn cache_dir() 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 := getenv('XDG_CACHE_HOME')
|
|
if xdg_cache_home != '' {
|
|
return xdg_cache_home
|
|
}
|
|
}
|
|
cdir := join_path_single(home_dir(), '.cache')
|
|
if !is_dir(cdir) && !is_link(cdir) {
|
|
mkdir(cdir) or { panic(err) }
|
|
}
|
|
return cdir
|
|
}
|
|
|
|
// temp_dir returns the path to a folder, that is suitable for storing temporary files.
|
|
pub fn temp_dir() string {
|
|
mut path := 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 = getenv('TEMP')
|
|
if path == '' {
|
|
path = getenv('TMP')
|
|
}
|
|
if path == '' {
|
|
path = 'C:/tmp'
|
|
}
|
|
}
|
|
}
|
|
$if macos {
|
|
// avoid /var/folders/6j/cmsk8gd90pd.... on macs
|
|
return '/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 {
|
|
hdir := home_dir()
|
|
res := join_path_single(hdir, '.vmodules')
|
|
return res
|
|
}
|
|
|
|
// 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
|
|
// [manualfree]
|
|
pub fn vmodules_paths() []string {
|
|
mut path := getenv('VMODULES')
|
|
if path == '' {
|
|
// unsafe { path.free() }
|
|
path = default_vmodules_path()
|
|
}
|
|
defer {
|
|
// unsafe { path.free() }
|
|
}
|
|
splitted := path.split(path_delimiter)
|
|
defer {
|
|
// unsafe { splitted.free() }
|
|
}
|
|
mut list := []string{cap: splitted.len}
|
|
for i in 0 .. splitted.len {
|
|
si := splitted[i]
|
|
trimmed := si.trim_right(path_separator)
|
|
list << trimmed
|
|
// unsafe { trimmed.free() }
|
|
// unsafe { si.free() }
|
|
}
|
|
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 {
|
|
unsafe { base_path.free() }
|
|
base_path = vresource
|
|
}
|
|
fp := join_path_single(base_path, path)
|
|
res := real_path(fp)
|
|
unsafe {
|
|
fp.free()
|
|
vresource.free()
|
|
base_path.free()
|
|
dexe.free()
|
|
exe.free()
|
|
}
|
|
return res
|
|
}
|
|
|
|
pub struct Uname {
|
|
pub mut:
|
|
sysname string
|
|
nodename string
|
|
release string
|
|
version string
|
|
machine string
|
|
}
|
|
|
|
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
|
|
}
|
|
|
|
pub fn execute_or_exit(cmd string) Result {
|
|
res := execute(cmd)
|
|
if res.exit_code != 0 {
|
|
eprintln('failed cmd: $cmd')
|
|
eprintln('failed code: $res.exit_code')
|
|
eprintln(res.output)
|
|
exit(1)
|
|
}
|
|
return res
|
|
}
|