#!/bin/bash
# uses Pygments v2.8.0 for syntax highlighting on applicable file types
for path in "$@"; do
    # match by known filenames
    filename=$(basename "$path")
    case "$filename" in
        .bash_aliases|.bash_environment|.bash_login|.bash_logout|\
        .bash_profile|.cshdirs|.cshrc|.kshrc|.profile|.tcshrc|.zlogin|\
        .zlogout|.zprofile|bash.bashrc|csh.cshrc|csh.login|csh.logout|\
        ksh.kshrc|zlogin|zlogout|zprofile)
            # shell lexer
            pygmentize -f 256 -O style="$PYGMENTIZE_STYLE" -l sh "$path"
            ;;
        .Renviron|.Rhistory|.Rprofile|.bashrc|.exrc|.gvimrc|.htaccess|.vimrc|\
        .zshrc|BUCK|BUILD|BUILD.bazel|CMakeLists.txt|Dockerfile|GNUmakefile|\
        Gemfile|Kconfig*|Makefile|Makefile.*|PKGBUILD|Pipfile|Pipfile.lock|\
        Rakefile|SConscript|SConstruct|Singularity|WORKSPACE|apache.conf|\
        apache2.conf|autodelegate|autohandler|bashrc|control|dhandler|exrc|\
        external.in*|gvimrc|makefile|nginx.conf|pacman.conf|poetry.lock|\
        sources.list|squid.conf|standard-modules.in|termcap|termcap.src|\
        terminfo|terminfo.src|todo.txt|vimrc|xorg.conf|zshrc)
            # filename recognized
            pygmentize -f 256 -O style="$PYGMENTIZE_STYLE" "$path"
            ;;
        *)
            ext=$([[ "$filename" = *.* ]] && echo ".${filename##*.}" || echo '')
            case "$ext" in
                .6pl|.6pm|.ABAP|.ASM|.BAS|.C|.CBL|.COB|.CPP|.CPY|.F|.F03|.F90|\
                .G|.H|.ICON|.PRG|.R|.Rd|.Rout|.S|.SAS|.VBS|.[1234567]|.abap|\
                .abnf|.ada|.adb|.adl|.adlf|.adls|.adlx|.ado|.ads|.agda|.aheui|\
                .ahk|.ahkl|.aj|.als|.apl|.applescript|.arexx|.arw|.as|.asax|\
                .ascx|.ashx|.asm|.asmx|.aspx|.asy|.at|.au3|.aug|.aux|.awk|\
                .axd|.b|.bare|.bas|.bash|.bat|.bb|.bbc|.bc|.befunge|.bf|.bib|\
                .bmx|.bnf|.boa|.boo|.bpl|.bro|.bst|.bug|.bzl|.c|.c++|\
                .c++-objdump|.c-objdump|.cadl|.camkes|.capnp|.cbl|.cc|.cddl|\
                .cdf|.cdl|.ceylon|.cf|.cfc|.cfg|.cfm|.cfml|.chai|.chpl|.ci|\
                .cirru|.cl|.clay|.clj|.cljs|.cls|.cmake|.cmd|.cob|.coffee|.cp|\
                .cpp|.cpp-objdump|.cps|.cpsa|.cpy|.cr|.crmsh|.croc|.cry|.cs|\
                .csd|.csh|.css|.css.in|.cu|.cuh|.cw|.cxx|.cxx-objdump|.cyp|\
                .cypher|.d|.d-objdump|.darcspatch|.dart|.dasm|.dasm16|.dcl|\
                .decls|.def|.dg|.di|.diff|.dmesg|.do|.docker|.dot|.dpatch|\
                .dpr|.dtd|.dts|.dtsi|.duby|.duel|.dyl|.dylan|.dylan-console|\
                .e|.ebnf|.ebuild|.ec|.ecl|.eclass|.edp|.eex|.eg|.eh|.el|.elm|\
                .eml|.eps|.erl|.erl-sh|.es|.escript|.evoque|.ex|.exec|\
                .exheres-0|.exlib|.exs|.ezt|.f|.f03|.f90|.factor|.fan|\
                .fancypack|.feature|.fhtml|.fish|.flo|.flx|.flxh|.fnl|.frag|\
                .frt|.fs|.fsi|.fst|.fsti|.fun|.fut|.fy|.g|.gap|.gd|.gdc|\
                .gemspec|.geo|.gi|.go|.golo|.gradle|.graph|.groovy|.gs|.gsp|\
                .gst|.gsx|.gv|.h|.h++|.haml|.handlebars|.hbs|.hdp|.hh|.hlsl|\
                .hlsli|.hpp|.hrl|.hs|.hsail|.htm|.html|.hx|.hxml|.hxsl|.hxx|\
                .hy|.hyb|.i|.i6t|.i7x|.icl|.icn|.icon|.idc|.idl4|.idr|.ijs|\
                .ik|.inc|.inf|.ini|.ino|.instances|.intr|.io|.ipf|.isa|.j|\
                .jade|.jag|.java|.jbst|.jcl|.jl|.js|.js.in|.jsgf|.jsm|.json|\
                .jsonld|.jsp|.juttle|.jy|.kal|.kid|.kif|.kk|.kki|.kmsg|.ksh|\
                .kt|.kts|.lagda|.lasso|.lasso[89]|.lcry|.lean|.less|.lgt|.lhs|\
                .lid|.lidr|.liquid|.lisp|.ll|.load|.logtalk|.ls|.lsl|.lsp|\
                .lua|.m|.ma|.mac|.mak|.man|.mao|.maql|.markdown|.mask|.mc|.md|\
                .mhtml|.mi|.mir|.mjs|.mk|.ml|.mli|.mll|.mly|.mm|.mo|.mod|\
                .monkey|.moo|.moon|.mos|.mq4|.mq5|.mqh|.ms|.msc|.mt|.mu|.mxml|\
                .myt|.n|.nb|.nbp|.nc|.ncl|.ng2|.ni|.nim|.nimrod|.nit|.nix|.nl|\
                .nqp|.ns2|.nsh|.nsi|.objdump|.objdump-intel|.odin|.ooc|.opa|\
                .orc|.p|.p6|.p6l|.p6m|.pan|.pas|.patch|.pc|.pcmk|.peg|.perl|\
                .php|.php[345]|.phtml|.pig|.pike|.pl|.pl6|.plot|.plt|.pm|.pm6|\
                .pmod|.po|.pony|.pot|.pov|.pp|.praat|.prg|.pro|.proc|.prolog|\
                .promql|.properties|.proto|.ps|.ps1|.psc|.psi|.psl|.psm1|\
                .ptls|.pug|.pwn|.pxd|.pxi|.py|.py2tb|.py3tb|.pypylog|.pytb|\
                .pyw|.pyx|.qbs|.qml|.qvto|.r|.r3|.rake|.raku|.rakudoc|\
                .rakumod|.rakutest|.rb|.rbw|.rbx|.re|.reb|.red|.reds|.reg|\
                .rei|.rest|.rex|.rexx|.rhtml|.ride|.rkt|.rktd|.rktl|.rl|.rnc|\
                .robot|.rpf|.rq|.rql|.rs|.rs.in|.rsl|.rss|.rst|.rts|.run|.rvt|\
                .rx|.s|.sage|.sarl|.sas|.sass|.sbl|.sc|.scala|.scaml|.scd|\
                .scdoc|.sce|.sci|.scm|.sco|.scss|.sgf|.sh|.sh-session|\
                .shell-session|.shen|.shex|.sieve|.sig|.sil|.siv|.sl|.sla|\
                .slim|.sls|.smali|.sml|.smv|.snobol|.sol|.sp|.sparql|.spec|\
                .spt|.sql|.sqlite3-console|.ss|.ssp|.st|.stan|.sv|.svh|.swg|\
                .swift|.t|.tac|.tap|.tasm|.tcl|.tcsh|.tea|.tex|.tf|.thrift|\
                .thy|.tid|.tmpl|.tnt|.toc|.todotxt|.toml|.tpl|.treetop|.ts|\
                .tst|.tsx|.tt|.ttl|.twig|.txt|.typoscript|.u|.u1|.u2|.udo|\
                .usd|.usda|.v|.vala|.vapi|.vark|.vb|.vbs|.vcl|.vert|.vhd|\
                .vhdl|.vim|.vm|.vpr|.wdiff|.webidl|.weechatlog|.whiley|.wlua|\
                .wsdl|.wsf|.x|.x10|.xhtml|.xi|.xm|.xmi|.xml|.xpl|.xq|.xql|\
                .xqm|.xquery|.xqy|.xsd|.xsl|.xslt|.xtend|.xtm|.xul.in|.yaml|\
                .yang|.yml|.zeek|.zep|.zig|.zsh|Config.in*)
                    # extension recognized
                    pygmentize -f 256 -O style="$PYGMENTIZE_STYLE" "$path"
                    ;;
                *)
                    # unrecognized filename/extension
                    # attempt to parse the lexer from the shebang if it exists
                    lexer=$(head -n 1 "$path" |grep "^#\!" |awk -F" " \
'match($1, /\/(\w*)$/, a) {if (a[1]!="env") {print a[1]} else {print $2}}')
                    case "$lexer" in
                        node|nodejs)
                            # workaround for lack of Node.js lexer alias
                            pygmentize -f 256 -O style="$PYGMENTIZE_STYLE" \
                                -l js "$path"
                            ;;
                        "")
                            # fall-back to plain text
                            exit 1
                            ;;
                        *)
                            # use lexer alias parsed from the shebang
                            pygmentize -f 256 -O style="$PYGMENTIZE_STYLE" \
                                -l "$lexer" "$path"
                            ;;
                    esac
                    ;;
            esac
            ;;
    esac
done
exit 0