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We have been checking the mawk version by extracting <x>, <y>, <z>, and <d> part from "mawk <x>.<y>.<z> <d>" in the output of the "mawk -W version" and testing <x>, <y>, <z>, and <d> using an arithmetic evalaution. However, <d> is ensured to be an integer only in "x.y.z >= 1.3.4". Otherwise, it may cause a syntax error in the arithmetic evaluation. The mawk started to include the date as an integer in the <d> position only from mawk-1.3.3-20090721. We should first check that "x.y.z >= 1.3.4" and then check the value of "d". In case, "mawk -W version" produces a completely different text, we should also redirect stderr of the arithmetic commands to /dev/null.
41 lines
1.8 KiB
Bash
41 lines
1.8 KiB
Bash
__fzf_defaults() {
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# $1: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
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# $2: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
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printf '%s\n' "--height ${FZF_TMUX_HEIGHT:-40%} --min-height 20+ --bind=ctrl-z:ignore $1"
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command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
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printf '%s\n' "${FZF_DEFAULT_OPTS-} $2"
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}
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__fzf_exec_awk() {
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# This function performs `exec awk "$@"` safely by working around awk
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# compatibility issues.
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#
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# To reduce an extra fork, this function performs "exec" so is expected to be
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# run as the last command in a subshell.
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if [[ -z ${__fzf_awk-} ]]; then
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__fzf_awk=awk
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if [[ $OSTYPE == solaris* && -x /usr/xpg4/bin/awk ]]; then
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# Note: Solaris awk at /usr/bin/awk is meant for backward compatibility
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# with an ancient implementation of 1977 awk in the original UNIX. It
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# lacks many features of POSIX awk, so it is essentially useless in the
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# modern point of view. To use a standard-conforming version in Solaris,
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# one needs to explicitly use /usr/xpg4/bin/awk.
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__fzf_awk=/usr/xpg4/bin/awk
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elif command -v mawk > /dev/null 2>&1; then
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# choose the faster mawk if: it's installed && build date >= 20230322 &&
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# version >= 1.3.4
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local n x y z d
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IFS=' .' read -r n x y z d <<< $(command mawk -W version 2> /dev/null)
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[[ $n == mawk ]] &&
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(((x * 1000 + y) * 1000 + z >= 1003004)) 2> /dev/null &&
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((d >= 20230302)) 2> /dev/null &&
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__fzf_awk=mawk
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fi
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fi
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# Note: macOS awk has a quirk that it stops processing at all when it sees
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# any data not following UTF-8 in the input stream when the current LC_CTYPE
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# specifies the UTF-8 encoding. To work around this quirk, one needs to
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# specify LC_ALL=C to change the current encoding to the plain one.
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LC_ALL=C exec "$__fzf_awk" "$@"
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}
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