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add -e flag to print, to print the value to stderr (#5935)

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* Refactor: make stdout write all and flush as generic function

* support print to stderr
This commit is contained in:
WindSoilder
2022-07-02 22:54:49 +08:00
committed by GitHub
parent be7f35246e
commit 84caf8859f
8 changed files with 64 additions and 16 deletions
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4
crates/nu-utils/src/lib.rs
View File

@ -1,5 +1,3 @@
pub mod utils;
pub use utils::{
enable_vt_processing, stdout_write_all_and_flush, stdout_write_all_as_binary_and_flush,
};
pub use utils::{enable_vt_processing, stderr_write_all_and_flush, stdout_write_all_and_flush};

18
crates/nu-utils/src/utils.rs
View File

@ -24,9 +24,12 @@ pub fn enable_vt_processing() -> Result<()> {
Ok(())
}
pub fn stdout_write_all_and_flush(output: String) -> Result<()> {
pub fn stdout_write_all_and_flush<T>(output: T) -> Result<()>
where
T: AsRef<[u8]>,
{
let stdout = std::io::stdout();
let ret = match stdout.lock().write_all(output.as_bytes()) {
let ret = match stdout.lock().write_all(output.as_ref()) {
Ok(_) => Ok(stdout.lock().flush()?),
Err(err) => Err(err),
};
@ -34,10 +37,13 @@ pub fn stdout_write_all_and_flush(output: String) -> Result<()> {
ret
}
pub fn stdout_write_all_as_binary_and_flush(output: &[u8]) -> Result<()> {
let stdout = std::io::stdout();
let ret = match stdout.lock().write_all(output) {
Ok(_) => Ok(stdout.lock().flush()?),
pub fn stderr_write_all_and_flush<T>(output: T) -> Result<()>
where
T: AsRef<[u8]>,
{
let stderr = std::io::stderr();
let ret = match stderr.lock().write_all(output.as_ref()) {
Ok(_) => Ok(stderr.lock().flush()?),
Err(err) => Err(err),
};