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garrytanandcapy-ai[bot]
1a9836aa50
Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>
81 lines
2.9 KiB
Awk
81 lines
2.9 KiB
Awk
# mask-commit-message.awk — read by careful/bin/check-careful.sh (#1060).
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# Prints the command with the quoted message argument of git commit
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# (-m, -am, --message) replaced by an empty quoted string. The command is
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# scanned as one string: newlines are kept, since bash runs each line as its
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# own command, and quote state carries across lines.
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#
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# Only git commit's own arguments are masked: the scanner splits the command
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# at unquoted ; & | ( ) and newlines, and masks a message flag only in a
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# segment whose first word is git and that has a commit word after it. A
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# commit piped into another command is printed unchanged, because git prints
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# the message on stdout. Quotes and backslashes follow bash: a backslash
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# escapes the next character outside single quotes, and nothing inside single
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# quotes. An unterminated quote or escape prints the command unchanged.
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function handle_msg(s, n, i, j, c, safe) {
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if (i > n) return i
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if (substr(s, i, 1) == "'") {
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j = i + 1
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while (j <= n && substr(s, j, 1) != "'") j++
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if (j > n) return i
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result = result "''"
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return j + 1
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}
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if (substr(s, i, 1) == "\"") {
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j = i + 1; safe = 1
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while (j <= n && (c = substr(s, j, 1)) != "\"") {
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if (c == "$" || c == "`" || c == "\\") safe = 0
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j++
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}
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if (!safe || j > n) return i
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result = result "\"\""
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return j + 1
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}
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return i
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}
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# flag S I — length of the message flag (with its trailing blanks) at S[I], or 0
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function flag(s, i, rest, m) {
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rest = substr(s, i)
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if (rest ~ /^--message=/) return 10
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if (match(rest, /^(--message|-am|-m)[ \t]+/)) return RLENGTH
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return 0
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}
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{ cmd = (NR > 1) ? cmd "\n" $0 : $0 }
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END {
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s = cmd
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n = length(s); sq = 0; dq = 0; bs = 0; i = 1
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atword = 1; words = 0; git = 0; commit = 0; piped = 0
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while (i <= n) {
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c = substr(s, i, 1)
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if (bs) { result = result c; bs = 0; i++; continue }
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if (sq) { if (c == "'") sq = 0; result = result c; i++; continue }
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if (dq) {
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if (c == "\\") bs = 1
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else if (c == "\"") dq = 0
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result = result c; i++; continue
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}
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if (c ~ /[;&|()\n]/) {
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if (c == "|" && commit && substr(s, i + 1, 1) != "|") piped = 1
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atword = 1; words = 0; git = 0; commit = 0
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result = result c; i++; continue
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}
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if (c == " " || c == "\t") { atword = 1; result = result c; i++; continue }
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if (atword) {
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atword = 0; words++
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rest = substr(s, i)
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if (words == 1 && rest ~ /^git([ \t\n;&|()]|$)/) git = 1
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else if (git && !commit && rest ~ /^commit([ \t\n;&|()]|$)/) commit = 1
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else if (commit && (len = flag(s, i)) > 0) {
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result = result substr(s, i, len); i += len
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j = handle_msg(s, n, i)
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atword = (j == i); i = j
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continue
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}
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}
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if (c == "\\") bs = 1
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else if (c == "'") sq = 1
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else if (c == "\"") dq = 1
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result = result c; i++
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}
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printf "%s", (sq || dq || bs || piped) ? s : result
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}
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