sharkdp
67fe804256
With this change, we do not pass the `--no-init` option in newer versions of less (530 or higher). This fixes #749
50 lines
1.4 KiB
Rust
50 lines
1.4 KiB
Rust
use std::process::Command;
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pub fn retrieve_less_version() -> Option<usize> {
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let cmd = Command::new("less").arg("--version").output().ok()?;
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parse_less_version(&cmd.stdout)
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}
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fn parse_less_version(output: &[u8]) -> Option<usize> {
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if output.starts_with(b"less ") {
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let version = std::str::from_utf8(&output[5..]).ok()?;
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let end = version.find(' ')?;
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version[..end].parse::<usize>().ok()
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} else {
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None
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}
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}
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#[test]
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fn test_parse_less_version_487() {
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let output = b"less 487 (GNU regular expressions)
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Copyright (C) 1984-2016 Mark Nudelman
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less comes with NO WARRANTY, to the extent permitted by law.
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For information about the terms of redistribution,
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see the file named README in the less distribution.
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Homepage: http://www.greenwoodsoftware.com/less";
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assert_eq!(Some(487), parse_less_version(output));
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}
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#[test]
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fn test_parse_less_version_551() {
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let output = b"less 551 (PCRE regular expressions)
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Copyright (C) 1984-2019 Mark Nudelman
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less comes with NO WARRANTY, to the extent permitted by law.
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For information about the terms of redistribution,
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see the file named README in the less distribution.
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Home page: http://www.greenwoodsoftware.com/less";
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assert_eq!(Some(551), parse_less_version(output));
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}
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#[test]
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fn test_parse_less_version_wrong_program() {
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let output = b"more from util-linux 2.34";
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assert_eq!(None, parse_less_version(output));
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}
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