52 lines
1.1 KiB
Text
52 lines
1.1 KiB
Text
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#!/usr/bin/awk -f
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BEGIN {
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isatty = system("test -t 1") == "0"
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retcode = 0
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}
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function color(code, s) {
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if (isatty) {
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return "\033[" code "m" s "\033[0m"
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}
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return s
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}
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function red(s) { return color("31", s) }
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function green(s) { return color("32", s) }
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function magenta(s) { return color("35", s) }
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function cyan(s) { return color("36", s) }
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function bg_red(s) { return color("41", s) }
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function hl_ws(s, pattern) {
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gsub(pattern, bg_red("&"), s)
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# convert tab characters to 8 spaces to allow coloring
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gsub(/\t/, " ", s)
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return s
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}
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/ +\t+/ {
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retcode = 1
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print magenta(FILENAME) cyan(":") green(FNR) cyan(":") \
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hl_ws($0, " +\\t+") red("<-- space(s) followed by tab(s)")
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}
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/[ \t]+$/ {
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retcode = 1
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print magenta(FILENAME) cyan(":") green(FNR) cyan(":") \
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hl_ws($0, "[ \\t]+$") red("<-- trailing whitespace")
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}
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ENDFILE {
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# will only match on GNU awk, ignored on non-GNU versions
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if ($0 ~ /^[ \t]*$/) {
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retcode = 1
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print magenta(FILENAME) cyan(": ") red("trailing new line(s)")
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} else if (RT != "\n") {
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retcode = 1
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print magenta(FILENAME) cyan(": ") red("no new line at end of file")
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}
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}
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END {
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exit retcode
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}
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