$ git clone https://github.com/YoungHaKim7/rtail.git
$ cd rtail
$ cargo install --path .
-
fork
-
https://github.com/17g/rtail/blob/master/src/main.rs
-
https://github.com/rust-lang/getopts/blob/master/src/lib.rs#L136
-
라이브러리 2개 씀(crates.io)
$ cargo r -- -n 10 src/global_fn.rs
for n in start_line..end_line {
result += &line_strs[n as usize][..];
result += "\n";
}
print_result(result);
}
fn print_result(disp_str: String) {
print!("{}", disp_str);
}
- This is tail command implemented Rust lang.
Usage: rtail [options] FILE
Options:
-n NUMS number of lines
-f, ---follow output appended data as the file grows
-h print help$ rustc --version --verbose
rustc 1.82.0 (f6e511eec 2024-10-15)
binary: rustc
commit-hash: f6e511eec7342f59a25f7c0534f1dbea00d01b14
commit-date: 2024-10-15
host: aarch64-apple-darwin
release: 1.82.0
LLVM version: 19.1.1
$ cargo t
running 50 tests
test tests::notify::poll_watcher::poll_watcher_is_send_and_sync ... ok
test tests::test_free_argument_is_hyphen ... ok
test tests::test_long_to_short ... ok
test tests::test_optflag_missing ... ok
test tests::test_optflag ... ok
test tests::test_long_name_too_short - should panic ... ok
test tests::test_optflag_short_arg ... ok
test tests::test_optopt ... ok
test tests::test_reqopt ... ok
test tests::test_split_within ... ok
test tests::test_usage_description_multibyte_handling ... ok
test tests::test_usage_description_newline_handling ... ok
test tests::test_usage ... ok
test tests::unicode_tests::ambiguous_line_break ... ok
test tests::test_undefined_opt_present - should panic ... ok
test tests::test_usage_description_wrapping ... ok
test tests::test_usage_multiwidth ... ok
test tests::unicode_tests::test_arabic_lam_alef ... ok
test tests::unicode_tests::test_bad_devanagari ... ok
test tests::unicode_tests::test_ambiguous ... ok
test tests::unicode_tests::test_buginese_a_i_ya ... ok
test tests::unicode_tests::test_char ... ok
test tests::unicode_tests::test_char2 ... ok
test tests::unicode_tests::test_control_line_break ... ok
test tests::unicode_tests::test_default_ignorable ... ok
test tests::unicode_tests::test_devanagari_caret ... ok
test tests::unicode_tests::test_emoji ... ok
test tests::unicode_tests::test_emoji_modifier ... ok
test tests::unicode_tests::test_emoji_presentation ... ok
test tests::unicode_tests::test_gcb_prepend ... ok
test tests::unicode_tests::test_hebrew_alef_lamed ... ok
test tests::unicode_tests::test_emoji_zwj ... ok
test tests::unicode_tests::test_hieroglyph_format_controls ... ok
test tests::unicode_tests::test_interlinear_annotation_chars ... ok
test tests::unicode_tests::test_jamo ... ok
test tests::unicode_tests::test_khmer_qaa ... ok
test tests::unicode_tests::test_khmer_sign_beyyal ... ok
test tests::unicode_tests::test_lisu_tones ... ok
test tests::unicode_tests::test_marks ... ok
test tests::unicode_tests::test_old_turkic_ligature ... ok
test tests::unicode_tests::test_prepended_concatenation_marks ... ok
test tests::unicode_tests::test_str ... ok
test tests::unicode_tests::test_solidus_overlay ... ok
test tests::unicode_tests::test_text_presentation ... ok
test tests::unicode_tests::test_tifinagh_biconsonants ... ok
test tests::unicode_tests::unicode_12 ... ok
test tests::unicode_tests::emoji_test_file ... ok
test tests::unicode_tests::char_str_consistent ... ok
test tests::unicode_tests::test_khmer_coeng ... ok
test tests::notify::race_with_remove_dir::test_race_with_remove_dir ... ok
test result: ok. 50 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.01s
# Rust Version 🦀 v1.82.0
$ cargo nextest run
PASS [ 0.007s] rtail::bin/rtail tests::test_long_to_short
PASS [ 0.008s] rtail::bin/rtail tests::notify::poll_watcher::poll_watcher_is_send_and_sync
PASS [ 0.008s] rtail::bin/rtail tests::test_free_argument_is_hyphen
PASS [ 0.009s] rtail::bin/rtail tests::test_long_name_too_short
PASS [ 0.008s] rtail::bin/rtail tests::test_optflag_missing
PASS [ 0.008s] rtail::bin/rtail tests::test_optflag_short_arg
PASS [ 0.010s] rtail::bin/rtail tests::test_optflag
PASS [ 0.007s] rtail::bin/rtail tests::test_optopt
PASS [ 0.008s] rtail::bin/rtail tests::test_reqopt
PASS [ 0.007s] rtail::bin/rtail tests::test_usage
PASS [ 0.007s] rtail::bin/rtail tests::test_usage_description_multibyte_handling
PASS [ 0.009s] rtail::bin/rtail tests::test_split_within
PASS [ 0.009s] rtail::bin/rtail tests::test_undefined_opt_present
PASS [ 0.008s] rtail::bin/rtail tests::test_usage_description_newline_handling
PASS [ 0.007s] rtail::bin/rtail tests::test_usage_description_wrapping
PASS [ 0.008s] rtail::bin/rtail tests::test_usage_multiwidth
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::ambiguous_line_break
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_ambiguous
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_arabic_lam_alef
PASS [ 0.006s] rtail::bin/rtail tests::unicode_tests::test_buginese_a_i_ya
PASS [ 0.009s] rtail::bin/rtail tests::unicode_tests::test_bad_devanagari
PASS [ 0.008s] rtail::bin/rtail tests::unicode_tests::test_char
PASS [ 0.008s] rtail::bin/rtail tests::unicode_tests::test_char2
PASS [ 0.009s] rtail::bin/rtail tests::unicode_tests::test_control_line_break
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_default_ignorable
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_devanagari_caret
PASS [ 0.008s] rtail::bin/rtail tests::unicode_tests::test_emoji
PASS [ 0.008s] rtail::bin/rtail tests::unicode_tests::test_emoji_modifier
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_emoji_presentation
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_emoji_zwj
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_gcb_prepend
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_hebrew_alef_lamed
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_hieroglyph_format_controls
PASS [ 0.008s] rtail::bin/rtail tests::unicode_tests::test_jamo
PASS [ 0.009s] rtail::bin/rtail tests::unicode_tests::test_interlinear_annotation_chars
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_khmer_qaa
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_khmer_sign_beyyal
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_marks
PASS [ 0.008s] rtail::bin/rtail tests::unicode_tests::test_lisu_tones
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_old_turkic_ligature
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_prepended_concatenation_marks
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_str
PASS [ 0.008s] rtail::bin/rtail tests::unicode_tests::test_solidus_overlay
PASS [ 0.049s] rtail::bin/rtail tests::unicode_tests::emoji_test_file
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_text_presentation
PASS [ 0.007s] rtail::bin/rtail tests::unicode_tests::test_tifinagh_biconsonants
PASS [ 0.006s] rtail::bin/rtail tests::unicode_tests::unicode_12
PASS [ 0.302s] rtail::bin/rtail tests::unicode_tests::char_str_consistent
PASS [ 0.550s] rtail::bin/rtail tests::unicode_tests::test_khmer_coeng
PASS [ 1.014s] rtail::bin/rtail tests::notify::race_with_remove_dir::test_race_with_remove_dir
------------
Summary [ 1.015s] 50 tests run: 50 passed, 0 skipped
$ cargo check --all-features --all-targets --all
Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12suse std::env;
use arg_options::Options;
use global_fn::{print_usage, tail_file, tail_stdin};
mod arg_options;
mod global_fn;
mod optgroup;
mod result_error;
#[allow(unused)]
mod tests;
#[allow(unused)]
fn main() {
let args: Vec<String> = env::args().collect();
let program = args[0].clone();
let mut options = Options::new();
options.optopt("n", "", "number of lines", "NUMS");
options.optflag("f", "-follow", "output appended data as the file grows");
options.optflag("h", "", "print help");
let cmd_args = match options.parse(&args[1..]) {
Ok(ok) => ok,
Err(e) => panic!("Cannot parse command args : {:?}", e),
};
if cmd_args.opt_present("h") {
print_usage(&program, &options);
}
let line_number = if cmd_args.opt_present("n") {
let str_num = match cmd_args.opt_str("n") {
Some(num) => num,
None => panic!("specify line number!"),
};
match str_num.trim().parse() {
Ok(num) => num,
Err(_) => panic!("specify line number!"),
}
} else {
10
};
let fflag = cmd_args.opt_present("f");
if cmd_args.free.is_empty() {
tail_stdin(line_number);
} else {
let file = cmd_args.free[0].clone();
tail_file(&file, line_number, fflag);
}
}