mirror of https://github.com/sharkdp/bat.git
45 lines
1.2 KiB
Rust
45 lines
1.2 KiB
Rust
/// If we use a pager, this enum tells us from where we were told to use it.
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#[derive(Debug, PartialEq)]
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pub enum PagerSource {
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/// From --config
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Config,
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/// From the env var BAT_PAGER
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BatPagerEnvVar,
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/// From the env var PAGER
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PagerEnvVar,
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/// No pager was specified, default is used
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Default,
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}
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/// A pager such as 'less', and from where we got it.
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pub struct Pager {
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pub pager: String,
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pub source: PagerSource,
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}
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impl Pager {
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fn new(pager: &str, source: PagerSource) -> Pager {
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Pager {
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pager: String::from(pager),
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source,
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}
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}
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}
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/// Returns what pager to use, after looking at both config and environment variables.
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pub fn get_pager(pager_from_config: Option<&str>) -> Pager {
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match (
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pager_from_config,
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std::env::var("BAT_PAGER"),
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std::env::var("PAGER"),
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) {
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(Some(config), _, _) => Pager::new(config, PagerSource::Config),
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(_, Ok(bat_pager), _) => Pager::new(&bat_pager, PagerSource::BatPagerEnvVar),
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(_, _, Ok(pager)) => Pager::new(&pager, PagerSource::PagerEnvVar),
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_ => Pager::new("less", PagerSource::Default),
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}
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}
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