What steps will reproduce the bug?

1. create a valid todo.txt file http://todotxt.org/ with a custom name, e.g. todo_2025-01.txt
2. run bat --map-syntax "todo*.txt:todo.txt" todo_2025-01.txt
3. run bat --map-syntax "todo*.txt:Todo.txt" todo_2025-01.txt
4. run bat --language todo.txt todo_2024-12.txt

What happens?

number 2 will fail with:

[bat error]: unknown syntax: 'todo.txt'

What did you expect to happen instead?

I expected syntax highlighting in the same way that the language flag works.

• It appears that the language flag is case insensitive.
• It appears that the map-syntax flag is case sensitive.

How did you install bat?

download msvc zip from https://github.com/sharkdp/bat/releases/tag/v0.25.0 extract exe to path.

bat version and environment

C:\>bat --version
bat 0.25.0 (25f4f96)

C:\>bat --diagnostic

Software version

bat 0.25.0 (25f4f96)

Operating system

Windows 6.2.9200

Command-line

bat --diagnostic

Environment variables

BAT_CACHE_PATH=<not set>
BAT_CONFIG_PATH=<not set>
BAT_OPTS=<not set>
BAT_PAGER=<not set>
BAT_PAGING=<not set>
BAT_STYLE=<not set>
BAT_TABS=<not set>
BAT_THEME=<not set>
COLORTERM=<not set>
LANG=<not set>
LC_ALL=<not set>
LESS=<not set>
MANPAGER=<not set>
NO_COLOR=<not set>
PAGER=<not set>
SHELL=<not set>
TERM=<not set>
XDG_CACHE_HOME=<not set>
XDG_CONFIG_HOME=<not set>

System Config file

Could not read contents of 'C:\ProgramData\bat\config': The system cannot find the path specified. (os error 3).

Config file

Could not read contents of 'C:\Users\clach04\AppData\Roaming\bat\config': The system cannot find the path specified. (os error 3).

Custom assets metadata

Could not read contents of 'C:\Users\clach04\AppData\Local\bat\metadata.yaml': The system cannot find the path specified. (os error 3).

Custom assets

'C:\Users\clach04\AppData\Local\bat' not found

Compile time information

• Profile: release
• Target triple: x86_64-pc-windows-msvc
• Family: windows
• OS: windows
• Architecture: x86_64
• Pointer width: 64
• Endian: little
• CPU features: cmpxchg16b,fxsr,sse,sse2,sse3
• Host: x86_64-pc-windows-msvc