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/*!
copy standard input to each files and standard output.
# Feature
- copy standard input to each files and standard output.
- output files are compressed by auto with filename extension.
- minimum support rustc 1.56.1 (59eed8a2a 2021-11-01)
# Command Help
```text
aki-xtee --help
```
```text
Usage:
aki-xtee [options] [<file>...]
this is like the linux command `tee`.
copy standard input to each <file>, and to standard output.
automatic discovery file type: plain, gz, xz and zst.
Options:
-a, --append <file> append to the <file>, do not overwrite [unimplemented]
-p, --pipe-out <num> write to pipe <num> [unimplemented]
-H, --help display this help and exit
-V, --version display version information and exit
Argument:
<file> utf-8 encoded plain text file,
gzip compressed file at the end with '.gz',
xz2 compressed file at the end with '.xz',
zstd compressed file at the end with '.zst'.
Examples:
You can simple use. Just arrange the files:
cat in-file | aki-xtee file1 file2.gz file3.xz file4.zst
```
# Quick install
1. you can install this into cargo bin path:
```text
cargo install aki-xtee
```
2. you can build debian package:
```text
cargo deb
```
and install **.deb** into your local repository of debian package.
# Examples
## Command line example 1
output "ABCDEFGH" to standard output and plain text file.
```text
echo "ABCDEFGH" | aki-xtee out/plain.txt
```
result output :
```text
ABCDEFGH
```
output "ABCDEFGH" to standard output and gzip text file.
```text
echo "ABCDEFGH" | aki-xtee out/gztext.txt.gz
```
result output :
```text
ABCDEFGH
```
output "ABCDEFGH" to standard output and xz text file.
```text
echo "ABCDEFGH" | aki-xtee out/xztext.txt.xz
```
result output :
```text
ABCDEFGH
```
output "ABCDEFGH" to standard output and zstd text file.
```text
echo "ABCDEFGH" | aki-xtee out/xztext.txt.zst
```
result output :
```text
ABCDEFGH
```
## Command line example 2
copy input to plain text file, gzip text file, xz text file and zstd text file.
```text
aki-xtee out/plain.txt out/gztext.txt.gz out/xztext.txt.xz out/zstext.txt.zst
```
## Library example
See [`fn execute()`] for this library examples.
[`fn execute()`]: crate::execute
*/
#[macro_use]
extern crate anyhow;
mod conf;
mod run;
mod util;
use flood_tide::HelpVersion;
use runnel::*;
use std::io::Write;
const TRY_HELP_MSG: &str = "Try --help for help.";
///
/// execute xcat
///
/// params:
/// - sioe: stream in/out/err
/// - program: program name. etc. "xcat"
/// - args: parameter arguments.
///
/// return:
/// - ok: ()
/// - err: anyhow
///
/// example:
///
/// ```
/// use runnel::RunnelIoeBuilder;
///
/// let r = libaki_xtee::execute(&RunnelIoeBuilder::new().build(),
/// "xtee", &["target/out/plain.txt", "target/out/gztext.txt.gz",
/// "target/out/xztext.txt.xz", "target/out/zstext.txt.zst"]);
/// ```
///
pub fn execute(sioe: &RunnelIoe, prog_name: &str, args: &[&str]) -> anyhow::Result<()> {
let conf = match conf::parse_cmdopts(prog_name, args) {
Ok(conf) => conf,
Err(errs) => {
for err in errs.iter().take(1) {
if err.is_help() || err.is_version() {
let _r = sioe.pout().lock().write_fmt(format_args!("{}\n", err));
return Ok(());
}
}
return Err(anyhow!("{}\n{}", errs, TRY_HELP_MSG));
}
};
run::run(sioe, &conf)
}