danvics/oxipng
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Allow strip and keep to be used together (#580)

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This is a minor change that allows using both `--strip` and `--keep` at
the same time.

E.g. `--strip safe --keep eXIf` will strip chunks while preserving both
the ones that aren't "safe" to remove *and* eXIf. Essentially it's a
convenience to allow extending the default list used by `--strip safe`.

Specifying chunk names for both options is not permitted, e.g. `--strip
eXIf --keep eXIf` will error.

Use of `--strip all` with `--keep` is redundant, but is permitted.
This commit is contained in:
andrews05 2023-11-19 01:06:49 +13:00 committed by GitHub
parent 0a988768ab
commit 97af04a539
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 16 additions and 13 deletions
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29
src/main.rs
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@ -176,9 +176,7 @@ depth is changed, regardless of any options set.",
Arg::new("keep")
.help("Strip all metadata except in the comma-separated list")
.long("keep")
.value_name("list")
.conflicts_with("strip")
.conflicts_with("strip-safe"),
.value_name("list"),
)
.arg(
Arg::new("alpha")
@ -613,14 +611,6 @@ fn parse_opts_into_struct(
};
}
if let Some(keep) = matches.get_one::<String>("keep") {
let names = keep
.split(',')
.map(parse_chunk_name)
.collect::<Result<_, _>>()?;
opts.strip = StripChunks::Keep(names)
}
if let Some(strip) = matches.get_one::<String>("strip") {
if strip == "safe" {
opts.strip = StripChunks::Safe;
@ -647,10 +637,23 @@ fn parse_opts_into_struct(
.collect::<Result<_, _>>()?;
opts.strip = StripChunks::Strip(names);
}
} else if matches.get_flag("strip-safe") {
opts.strip = StripChunks::Safe;
}
if matches.get_flag("strip-safe") {
opts.strip = StripChunks::Safe;
if let Some(keep) = matches.get_one::<String>("keep") {
if matches!(opts.strip, StripChunks::Strip(_)) {
return Err("--strip <list> and --keep cannot be used together".to_owned());
}
let mut names: IndexSet<_> = keep
.split(',')
.map(parse_chunk_name)
.collect::<Result<_, _>>()?;
if opts.strip == StripChunks::Safe {
// Add the keep safe chunks to the list
names.extend(StripChunks::KEEP_SAFE.iter().cloned());
}
opts.strip = StripChunks::Keep(names);
}
if matches.get_flag("zopfli") {