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5413bfa8e3
Improves upon #25205 https://gist.github.com/pbogdan/9d6986bf931b58a70d75e14eb40ee8a1 parsing time is reduced from one minute to one second
75 lines
1.9 KiB
Bash
75 lines
1.9 KiB
Bash
skip () {
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if [ -n "$NIX_DEBUG" ]; then
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echo "skipping impure path $1" >&2
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fi
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}
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# Checks whether a path is impure. E.g., `/lib/foo.so' is impure, but
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# `/nix/store/.../lib/foo.so' isn't.
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badPath() {
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local p=$1
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# Relative paths are okay (since they're presumably relative to
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# the temporary build directory).
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if [ "${p:0:1}" != / ]; then return 1; fi
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# Otherwise, the path should refer to the store or some temporary
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# directory (including the build directory).
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test \
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"$p" != "/dev/null" -a \
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"${p:0:${#NIX_STORE}}" != "$NIX_STORE" -a \
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"${p:0:4}" != "/tmp" -a \
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"${p:0:${#NIX_BUILD_TOP}}" != "$NIX_BUILD_TOP"
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}
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# @args.rsp parser.
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# Char classes: space, other, backslash, single quote, double quote.
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# States: 0 - outside, 1/2 - unquoted arg/slash, 3/4 - 'arg'/slash, 5/6 - "arg"/slash.
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# State transitions:
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rspT=(01235 01235 11111 33413 33333 55651 55555)
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# Push (a) arg or (c) char on transition:
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rspP[10]=a rspP[01]=c rspP[11]=c rspP[21]=c rspP[33]=c rspP[43]=c rspP[55]=c rspP[65]=c
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rspParse() {
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rsp=()
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local state=0
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local arg=''
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local c
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while read -r -N1 c; do
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local cls=1
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case "$c" in
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' ' | $'\t' | $'\r' | $'\n') cls=0 ;;
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'\') cls=2 ;;
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"'") cls=3 ;;
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'"') cls=4 ;;
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esac
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local nextstates="${rspT[$state]}"
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local nextstate="${nextstates:$cls:1}"
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case "${rspP[$state$nextstate]}" in
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'c') arg+="$c" ;;
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'a') rsp+=("$arg"); arg='' ;;
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esac
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state="$nextstate"
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done
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if [ "$state" -ne 0 ]; then
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rsp+=("$arg")
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fi
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}
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expandResponseParams() {
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params=()
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while [ $# -gt 0 ]; do
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local p="$1"
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shift
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if [ "${p:0:1}" = '@' -a -e "${p:1}" ]; then
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rspParse <"${p:1}"
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set -- "${rsp[@]}" "$@"
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else
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params+=("$p")
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fi
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done
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}
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