v0.19.0

Performance

• Reduce startup time in loop-through mode (e.g. when redirecting output) by 90%. See #1747 (@Enselic)
• Load themes lazily to make bat start 25% faster when disregarding syntax load time. See #1969 (@Enselic)
• Python syntax highlighting no longer suffers from abysmal performance in specific scenarios. See #1688 (@keith-hall)
• Fix for poor performance when ANSI escape sequences are piped to bat, see #1596 (@eth-p)
• Fix for incorrect handling of ANSI escape sequences when using --wrap=never, see #1596 (@eth-p)
• Load custom assets as fast as integrated assets, see #1753 (@Enselic)

Features

• Support for x:-delta (minus) syntax in line ranges (e.g. 20:-10). See #1901 (@bojan88)
• Support for --ignored-suffix argument. See #1892 (@bojan88)
• $BAT_CONFIG_DIR is now a recognized environment variable. It has precedence over $XDG_CONFIG_HOME, see #1727 (@billrisher)
• Support for x:+delta syntax in line ranges (e.g. 20:+10). See #1810 (@bojan88)
• Add new --acknowledgements option that gives credit to theme and syntax definition authors. See #1971 (@Enselic)
• Include git hash in bat -V and bat --version output if present. See #1921 (@Enselic)

Bugfixes

• First line not shown in diff context. See #1891 (@divagant-martian)
• Do not ignore syntaxes that handle file names with a *.conf extension. See #1703 (@cbolgiano)

Other

• Add PowerShell completion, see #1826 (@rashil2000)
• Minimum supported Rust version (MSRV) bumped to 1.51, see #1994 (@mdibaiee)

Syntaxes

• Groff, see #1685 (@scop)
• HTTP Requests and Responses, see #1748 (@keith-hall)
• LLVM, see #1777 (@ioncodes)
• Highlight for vimrc and gvimrc files, see #1763 (@SuperSandro2000)
• Syslog highlighting improvements, see #1793 (@scop)
• Added support for slim syntax, see #1693 (@mfinelli)
• Racket, see #1884 (@jubnzv)
• LiveScript, see #1915 (@Enselic)
• MediaWiki, see #1925 (@sorairolake)
• The requirements.txt syntax has been removed due to incompatible license requirements.
• Dart, new highlighter, see #1959 (@Ersikan)
• SCSS and Sass syntaxes updated, see #1766 (@Enselic)
• PowerShell syntax updated, see #1935 (@Enselic)
• TypeScript syntax updated, see #1834 (@Enselic)

bat as a library

• Deprecate HighlightingAssets::syntaxes() and HighlightingAssets::syntax_for_file_name(). Use HighlightingAssets::get_syntaxes() and HighlightingAssets::get_syntax_for_path() instead. They return a Result which is needed for upcoming lazy-loading work to improve startup performance. They also return which SyntaxSet the returned SyntaxReference belongs to. See #1747, #1755, #1776, #1862 (@Enselic)
• Remove HighlightingAssets::from_files and HighlightingAssets::save_to_cache. Instead of calling the former and then the latter you now make a single call to bat::assets::build. See #1802, #1971 (@Enselic)
• Replace the error::Error(error::ErrorKind, _) struct and enum with an error::Error enum. Error(ErrorKind::UnknownSyntax, _) becomes Error::UnknownSyntax, etc. Also remove the error::ResultExt trait. These changes stem from replacing error-chain with thiserror. See #1820 (@Enselic)
• Add new MappingTarget enum variant MapExtensionToUnknown. Refer to its documentation for more information. Also mark MappingTarget as #[non_exhaustive] since more enum variants might be added in the future. See #1703 (@cbolgiano), #2012 (@Enselic)