dotfiles/.lessfilter

#!/bin/zsh
# Try to use highlight. If that fails or the output looks suspicious, use
# lesspipe normally.

setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL

local file="${1}"
local ret
local output

if type highlight >& -; then
    output="$(highlight --force \
                        --out-format=truecolor \
                        --style=base16/unikitty-reversible \
                        --stdout "${file}")"
    ret=${?}
elif type pygmentize >& -; then
    output="$(pygmentize -f terminal16m -g -O style=paraiso-dark ${file})"
    ret=${?}
elif type source-highlight >& -; then
    output="$(source-highlight --failsafe \
                               --infer-lang \
                               --out-format=esc \
                               --style-file=esc.style \
                               --input=${file})"
    ret=${?}
fi
[[ ${ret} -eq 0 ]] || return ${ret}

# Try to catch when the output is just the magic string
zmodload zsh/stat
if [[ ${#output} -lt 256 && $(zstat +size "${file}") -gt 256 ]]; then
    return 1
fi

print -r ${output}