keep-header — Keep first line untouched by a command, passing it directly to `stdout`. More information: <https://

Sort a file and keep the first line at the top

keep-header {{path/to/file}} -- sort

Output first line directly to `stdout`, passing the remainder of the file through the specified command

keep-header {{path/to/file}} -- {{command}}

Read from `stdin`, sorting all except the first line

cat {{path/to/file}} | keep-header -- {{command}}

Grep a file, keeping the first line regardless of the search pattern

keep-header {{path/to/file}} -- grep {{pattern}}