58 lines
1.5 KiB
Bash
58 lines
1.5 KiB
Bash
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NL="
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"
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# Like 'echo', but never processes backslash escapes.
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# (Some shells' builtin echo do, and some don't, so this
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# is safer.)
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xecho() {
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printf '%s\n' "$*"
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}
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# Returns true if string $1 contains the line $2.
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# Lines are delimited by $NL.
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contains_line() {
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case "$NL$1$NL" in
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*"$NL$2$NL"*) return 0 ;;
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*) return 1 ;;
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esac
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}
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# Split the first (up to) 20 words from $1,
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# returning a string where the words are separated
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# by $NL instead.
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#
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# To allow words including whitespace, you can backslash
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# escape the whitespace (eg. hello\ world). Backslashes
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# will be removed from the output string.
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#
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# We can use this to read pkg-config output, among other
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# things.
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#
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# TODO: find a POSIX sh way to eliminate the word limit.
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# I couldn't find an easy way to split on non-backslashed
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# whitespace without a fork-exec, which is too slow.
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# If we resorted to bashisms, we could use 'read -a',
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# but that's not portable.
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rc_splitwords() {
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xecho "$1" | (
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read v0 v1 v2 v3 v4 v5 v6 v7 v8 v9 \
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v10 v11 v12 v13 v14 v15 v16 v17 v18 v19 \
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x
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if [ -n "$x" ]; then
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echo "rc_splitwords: too many words" >&2
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exit 97
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fi
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for d in "$v0" "$v1" "$v2" "$v3" "$v4" \
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"$v5" "$v6" "$v7" "$v8" "$v9" \
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"$v10" "$v11" "$v12" "$v13" "$v14" \
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"$v15" "$v16" "$v17" "$v18" "$v19"; do
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[ -z "$d" ] || xecho "$d"
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done
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)
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}
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# Escape single-quote characters so they can
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# be included as a sh-style single-quoted string.
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shquote() {
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printf "'%s'" "$(xecho "$1" | sed -e "s,','\\\\'',g")"
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}
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