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Add "max" level alias; more level warnings

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This commit is contained in:
Ingvar Stepanyan 2020-04-20 12:29:43 +01:00
parent cffc3ce991
commit 5536e5acd2
2 changed files with 27 additions and 15 deletions
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10
src/lib.rs
View file

@ -206,10 +206,18 @@ impl Options {
opts.apply_preset_4()
}
5 => opts.apply_preset_5(),
_ => opts.apply_preset_6(),
6 => opts.apply_preset_6(),
_ => {
warn!("Level 7 and above don't exist yet and are identical to level 6");
opts.apply_preset_6()
}
}
}
pub fn max_compression() -> Options {
Options::from_preset(6)
}
// The following methods make assumptions that they are operating
// on an `Options` struct generated by the `default` method.
fn apply_preset_0(mut self) -> Self {

32
src/main.rs
View file

@ -52,7 +52,8 @@ fn main() {
.possible_value("3")
.possible_value("4")
.possible_value("5")
.possible_value("6"))
.possible_value("6")
.possible_value("max"))
.arg(Arg::with_name("backup")
.help("Back up modified files")
.short("b")
@ -227,13 +228,14 @@ fn main() {
}
}))
.after_help("Optimization levels:
-o 0 => --zc 3 --nz (0 or 1 trials)
-o 1 => --zc 9 (1 trial, determined heuristically)
-o 2 => --zc 9 --zs 0-3 -f 0,5 (8 trials)
-o 3 => --zc 9 --zs 0-3 -f 0-5 (24 trials)
-o 4 => (deprecated; same as `-o 3`)
-o 5 => --zc 3-9 --zs 0-3 -f 0-5 (96 trials)
-o 6 => --zc 1-9 --zs 0-3 -f 0-5 (180 trials)
-o 0 => --zc 3 --nz (0 or 1 trials)
-o 1 => --zc 9 (1 trial, determined heuristically)
-o 2 => --zc 9 --zs 0-3 -f 0,5 (8 trials)
-o 3 => --zc 9 --zs 0-3 -f 0-5 (24 trials)
-o 4 => (deprecated; same as `-o 3`)
-o 5 => --zc 3-9 --zs 0-3 -f 0-5 (96 trials)
-o 6 => --zc 1-9 --zs 0-3 -f 0-5 (180 trials)
-o max => (alias for the max compression, currently same as -o 6)
Manually specifying a compression option (zc, zs, etc.) will override the optimization preset,
regardless of the order you write the arguments.")
@ -321,13 +323,15 @@ fn parse_opts_into_struct(
.init()
.unwrap();
let level = match matches.value_of("optimization") {
Some(x) => x.parse::<u8>().unwrap(),
None => 2,
let (explicit_level, mut opts) = match matches.value_of("optimization") {
None => (None, Options::default()),
Some("max") => (None, Options::max_compression()),
Some(level) => {
let level = level.parse::<u8>().unwrap();
(Some(level), Options::from_preset(level))
}
};
let mut opts = Options::from_preset(level);
if let Some(x) = matches.value_of("interlace") {
opts.interlace = x.parse::<u8>().ok();
}
@ -491,7 +495,7 @@ fn parse_opts_into_struct(
}
}
if level > 3 {
if explicit_level > Some(3) {
match opts.deflate {
Deflaters::Zlib { .. } => {}
_ => {