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doc: update the cross-platform shell scripts section (#8791)

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Wink Saville 2021-02-20 08:55:24 -08:00 committed by GitHub
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@ -3827,29 +3827,42 @@ The advantage of using V for this is the simplicity and predictability of the la
cross-platform support. "V scripts" run on Unix-like systems as well as on Windows. cross-platform support. "V scripts" run on Unix-like systems as well as on Windows.
Use the `.vsh` file extension. It will make all functions in the `os` Use the `.vsh` file extension. It will make all functions in the `os`
module global (so that you can use `ls()` instead of `os.ls()`, for example). module global (so that you can use `mkdir()` instead of `os.mkdir()`, for example).
An example `deploy.vsh`:
```v wip ```v wip
#!/usr/local/bin/v run
// The shebang above associates the file to V on Unix-like systems, // The shebang above associates the file to V on Unix-like systems,
// so it can be run just by specifying the path to the file // so it can be run just by specifying the path to the file
// once it's made executable using `chmod +x`. // once it's made executable using `chmod +x`.
rm('build/*')? // Remove if build/ exits, ignore any errors if it doesn't
// Same as: rmdir_all('build') or { }
files_build := ls('build/')?
for file in files_build {
rm(file)?
}
mv('*.v', 'build/')? // Create build/, never fails as build/ does not exist
// Same as: mkdir('build') ?
files := ls('.')?
for file in files { // Move *.v files to build/
if file.ends_with('.v') { result := exec('mv *.v build/') ?
mv(file, 'build/')? if result.exit_code != 0 {
} println(result.output)
} }
// Similar to:
// files := ls('.') ?
// mut count := 0
// if files.len > 0 {
// for file in files {
// if file.ends_with('.v') {
// mv(file, 'build/') or {
// println('err: $err')
// return
// }
// }
// count++
// }
// }
// if count == 0 {
// println('No files')
// }
``` ```
Now you can either compile this like a normal V program and get an executable you can deploy and run Now you can either compile this like a normal V program and get an executable you can deploy and run