mirror of
https://github.com/eth-p/bat-extras.git
synced 2024-11-07 08:14:02 +01:00
383 lines
7.6 KiB
Bash
Executable File
383 lines
7.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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# -----------------------------------------------------------------------------
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# bat-extras | Copyright (C) 2020 eth-p | MIT License
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#
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# Repository: https://github.com/eth-p/bat-extras
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# Issues: https://github.com/eth-p/bat-extras/issues
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# -----------------------------------------------------------------------------
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# shellcheck disable=SC2021
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# shellcheck disable=SC2155
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printf_msg() {
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# shellcheck disable=SC2059
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printf "$@" 1>&2
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}
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printf_err() {
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# shellcheck disable=SC2059
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printf "$@" 1>&2
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}
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# -----------------------------------------------------------------------------
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# MDroff:
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# -----------------------------------------------------------------------------
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mdroff:emit:h1() {
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printf '.TH "%s" 1\n' "$1"
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}
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mdroff:emit:h2() {
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printf '.SH "%s"\n' "$1"
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}
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mdroff:emit:h3() {
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printf '.SS "%s"\n' "$1"
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}
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mdroff:emit:h4() {
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printf '.SS "%s"\n' "$1"
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}
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mdroff:emit:h5() {
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printf '.SS "%s"\n' "$1"
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}
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mdroff:emit:line() {
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if "$MDROFF_PARAGRAPH"; then
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MDROFF_PARAGRAPH=false
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printf ".P\n%s\n" "$1"
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else
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printf ".br\n%s\n" "$1"
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fi
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}
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mdroff:emit:attr() {
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printf '\\fR'
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if "$MDROFF_ATTR_STRONG"; then
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printf '\\fB'
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fi
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if "$MDROFF_ATTR_EMPHASIS"; then
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printf '\\fI'
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fi
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if "$MDROFF_ATTR_CODE"; then
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printf '\\fI'
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fi
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}
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mdroff:emit:link() {
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printf "%s" "$1"
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}
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# shellcheck disable=SC2034
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mdroff:emit:table_start() {
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printf ".TS\n"
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printf "tab(|) box;\n"
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# Print Header Alignment
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local temp
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for temp in "$@"; do printf "| cB "; done
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printf "|\n"
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# Print Separator
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for temp in "$@"; do printf "| _ "; done
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printf "|\n"
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# Print Column Alignment
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local cols=("$@")
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printf "| "
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printf "%s0 |1 " "${cols:0:$((${#@}-1))}"
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printf "%s " "${cols[$((${#@}-1))]}"
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printf "|.\n"
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}
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mdroff:emit:table_end() {
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printf ".TE\n\n"
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}
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mdroff:emit:table_heading() {
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local heading="$(printf "| %s " "$@")"
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printf "%s\n" "${heading:1}"
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# Prevent tbl warning.
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for temp in "${@:2}"; do printf "|"; done
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printf "\n"
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# Start table data.
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printf ".SP\n"
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}
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mdroff:emit:table_row() {
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local row="$(printf "| %s " "$@")"
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printf "%s\n" "${row:1}"
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}
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mdroff:emit:text() {
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local text="$1"
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text="${text//<br>/ }"
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text="${text//<br\/>/ }"
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text="${text//<br \/>/ }"
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printf "%s" "$text"
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}
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mdroff:emit() {
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local type="$1"
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local data="$2"
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if type "mdroff:rewrite:${type}" &>/dev/null; then
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data="$("mdroff:rewrite:${type}" "${@:2}")"
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fi
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if type "mdroff:emit_hook:${type}" &>/dev/null; then
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"mdroff:emit_hook:${type}" "$data" "${@:3}"
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return
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fi
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"mdroff:emit:${type}" "$data" "${@:3}"
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}
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mdroff:trim_right() {
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# shellcheck disable=SC2001
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sed 's/[[:space:]]*$//' <<< "$1"
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}
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mdroff:trim() {
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sed 's/^[[:space:]]*//; s/[[:space:]]*$//' <<< "$1"
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}
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mdroff:parseln() {
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MDROFF_ATTR_STRONG=false
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MDROFF_ATTR_EMPHASIS=false
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MDROFF_ATTR_CODE=false
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local buffer="$1"
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local before
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local found
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local pos
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while [[ "${#buffer}" -gt 0 ]]; do
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[[ "$buffer" =~ \*{1,3}|\`|\[([^\]]+)\]\(([^\)]+)\) ]] || {
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mdroff:emit text "$(mdroff:trim_right "$buffer")"
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mdroff:emit text $'\n'
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return
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}
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found="${BASH_REMATCH[0]}"
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pos="$(awk -v search="$found" '{print index($0,search) - 1}' <<< "$buffer")"
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before="${buffer:0:$pos}"
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buffer="${buffer:$(($pos + ${#found}))}"
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mdroff:emit text "$before"
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case "$found" in
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'***')
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if "$MDROFF_ATTR_STRONG" && "$MDROFF_ATTR_EMPHASIS"; then
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MDROFF_ATTR_STRONG=false
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MDROFF_ATTR_EMPHASIS=false
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else
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MDROFF_ATTR_STRONG=true
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MDROFF_ATTR_EMPHASIS=true
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fi
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mdroff:emit attr
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;;
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'**')
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if "$MDROFF_ATTR_STRONG"; then
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MDROFF_ATTR_STRONG=false
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else
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MDROFF_ATTR_STRONG=true
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fi
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mdroff:emit attr
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;;
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'*')
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if "$MDROFF_ATTR_EMPHASIS"; then
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MDROFF_ATTR_EMPHASIS=false
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else
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MDROFF_ATTR_EMPHASIS=true
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fi
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mdroff:emit attr
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;;
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'`')
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if "$MDROFF_ATTR_CODE"; then
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MDROFF_ATTR_CODE=false
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else
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MDROFF_ATTR_CODE=true
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fi
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mdroff:emit attr
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;;
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'['*)
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mdroff:emit link "${BASH_REMATCH[1]}" "${BASH_REMATCH[2]}"
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esac
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done
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}
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mdroff() {
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MDROFF_HEADING_LEVEL=0
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MDROFF_HEADING=''
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MDROFF_ATTR_STRONG=false
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MDROFF_ATTR_EMPHASIS=false
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MDROFF_ATTR_CODE=false
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MDROFF_IN_TABLE=false
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MDROFF_PARAGRAPH=false
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MDROFF_TABLE_HEADER=()
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local line
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local empty=0
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local empty_continue=0
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while IFS='' read -r line; do
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line="$(mdroff:parseln "$line")"
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# Empty
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if [[ "$line" =~ ^[[:space:]]*$ ]]; then
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((empty_continue++)) || true
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if "$MDROFF_IN_TABLE"; then
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mdroff:emit table_end
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fi
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MDROFF_PARAGRAPH=true
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MDROFF_TABLE_HEADER=()
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MDROFF_IN_TABLE=false
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continue
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fi
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empty="$empty_continue"
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empty_continue=0
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# Headings
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if [[ "$line" =~ ^(#{1,})[[:space:]]{1,}(.*)$ ]]; then
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local level="${#BASH_REMATCH[1]}"
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local text="${BASH_REMATCH[2]}"
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MDROFF_HEADING_LEVEL="$level"
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MDROFF_HEADING="$text"
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mdroff:emit "h${level}" "$text"
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MDROFF_PARAGRAPH=true
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continue
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fi
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# Tables (Partially Supported)
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if [[ "$line" =~ ^[[:space:]]*\| ]]; then
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local raw_cells=()
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local cells=()
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local table_cell
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line="$(sed 's/^[[:space:]]*|//; s/|[[:space:]]*$//' <<< "$line")"
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# shellcheck disable=SC2206
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IFS='|' raw_cells=($line)
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for table_cell in "${raw_cells[@]}"; do
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cells+=("$(mdroff:trim "$table_cell")")
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done
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if [[ "${cells[0]}" =~ ^[[:space:]]*-+[[:space:]]*$ ]]; then
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# Calculate the column alignments.
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local table_alignments=()
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local table_cell
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for table_cell in "${cells[@]}"; do
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case "$table_cell" in
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:-*:)
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table_alignments+=('c')
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;;
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:-*)
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table_alignments+=('l')
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;;
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*-:)
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table_alignments+=('r')
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;;
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*)
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table_alignments+=('l') # Unknown, but let's assume left.
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esac
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done
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# Emit the table start and table header.
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mdroff:emit table_start "${table_alignments[@]}"
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mdroff:emit table_heading "${MDROFF_TABLE_HEADER[@]}"
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MDROFF_TABLE_HEADER=()
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continue
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fi
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if ! "$MDROFF_IN_TABLE"; then
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MDROFF_IN_TABLE=true
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MDROFF_TABLE_HEADER=("${cells[@]}")
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else
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if [[ "${#MDROFF_TABLE_HEADER[@]}" -ne 0 ]]; then
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mdroff:emit table_heading "${MDROFF_TABLE_HEADER[@]}"
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MDROFF_TABLE_HEADER=()
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fi
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mdroff:emit table_row "${cells[@]}"
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fi
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MDROFF_PARAGRAPH=true
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continue
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fi
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mdroff:emit line "$line"
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done < <(sed 's/<br *\/?>//')
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}
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# -----------------------------------------------------------------------------
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# bat-extras:
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# -----------------------------------------------------------------------------
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mdroff:rewrite:h1() {
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emitted_name=false
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emitted_description=false
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sed 's/^bat-extras: //' <<< "$1" | tr '[[:lower:]]' '[[:upper:]]'
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}
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mdroff:emit_hook:h2() {
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case "$MDROFF_HEADING" in
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"Installation") return ;;
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"Issues?") return ;;
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esac
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mdroff:emit:h2 "$(tr '[[:lower:]]' '[[:upper:]]' <<< "$1")"
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}
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mdroff:emit_hook:line() {
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if [[ "$MDROFF_HEADING_LEVEL" = "1" ]] && [[ "$emitted_name" != true ]]; then
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emitted_name=true
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printf ".SH NAME\n%s - %s\n" "$(sed 's/^bat-extras: //' <<< "$MDROFF_HEADING" | tr '[[:upper:]]' '[[:lower:]]')" "$1"
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printf ".SH DESCRIPTION\n"
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return
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fi
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case "$MDROFF_HEADING" in
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"Installation") return ;;
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"Issues?") return ;;
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esac
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mdroff:emit:line "$@"
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}
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# -----------------------------------------------------------------------------
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# Main:
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# -----------------------------------------------------------------------------
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if [[ "${#BASH_SOURCE[@]}" -eq 1 ]]; then
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case "$1" in
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"") mdroff ;;
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*) {
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if ! [ -f "$1" ]; then
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printf_err "%s: cannot find or read file %s\n" "$0" "$1"
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exit 1;
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fi
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mdroff < "$1"
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} ;;
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esac
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fi
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