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[bash] Improve mawk detection (#3463)
* Use the all-compatible mawk `-W version` option. https://github.com/junegunn/fzf/pull/3313#issuecomment-1747934690. * Run the command and not a function consistently with #3462. The version check bash code relies on the following mawk source code, extracted from mawk 1.3.4 20230322. ``` version.c: 18- #include "init.h" 19- #include "patchlev.h" 20- 21: #define VERSION_STRING \ 22- "mawk %d.%d%s %s\n\ 23- Copyright 2008-2022,2023, Thomas E. Dickey\n\ 24- Copyright 1991-1996,2014, Michael D. Brennan\n\n" .... 30- void 31- print_version(FILE *fp) 32- { 33: fprintf(fp, VERSION_STRING, PATCH_BASE, PATCH_LEVEL, PATCH_STRING, DATE_STRING); 34- fflush(fp); 35- 36- #define SHOW_RANDOM "random-funcs:" patchlev.h: 13- /* 14- * $MawkId: patchlev.h,v 1.128 2023/03/23 00:23:57 tom Exp $ 15- */ 16: #define PATCH_BASE 1 17- #define PATCH_LEVEL 3 18- #define PATCH_STRING ".4" 19- #define DATE_STRING "20230322" ``` Co-authored-by: Junegunn Choi <junegunn.c@gmail.com>
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@ -56,7 +56,7 @@ if command -v perl > /dev/null; then
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output=$(
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set +o pipefail
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builtin fc -lnr -2147483648 |
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last_hist=$(HISTTIMEFORMAT='' builtin history 1) perl -n -l0 -e "$script" |
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last_hist=$(HISTTIMEFORMAT='' builtin history 1) command perl -n -l0 -e "$script" |
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FZF_DEFAULT_OPTS="$opts" $(__fzfcmd) --query "$READLINE_LINE"
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) || return
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READLINE_LINE=${output#*$'\t'}
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@ -66,16 +66,14 @@ if command -v perl > /dev/null; then
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READLINE_POINT=0x7fffffff
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fi
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}
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else # awk
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else # awk - fallback for POSIX systems
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__fzf_history__() {
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local output opts script
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local output opts script n x y z d
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if [[ -z $__fzf_awk ]]; then
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__fzf_awk=awk
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# if installed, mawk is faster
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command -v mawk > /dev/null &&
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mawk --version | # at least 1.3.4
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awk 'NR == 1 { split($2, a, "."); v=(a[1]*1000000+ a[2]*1000+ a[3]*1); exit !(v >= 1003004) }' &&
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__fzf_awk=mawk
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# choose the faster mawk if: it's installed && build date >= 20230322 && version >= 1.3.4
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IFS=' .' read n x y z d <<< $(command mawk -W version 2> /dev/null)
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[[ $n == mawk ]] && (( d >= 20230302 && (x *1000 +y) *1000 +z >= 1003004 )) && __fzf_awk=mawk
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fi
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opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} -n2..,.. --scheme=history --bind=ctrl-r:toggle-sort ${FZF_CTRL_R_OPTS-} +m --read0"
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[[ $(HISTTIMEFORMAT='' builtin history 1) =~ [[:digit:]]+ ]] # how many history entries
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@ -87,7 +85,7 @@ else # awk
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output=$(
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set +o pipefail
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builtin fc -lnr -2147483648 2> /dev/null | # ( $'\t '<lines>$'\n' )* ; <lines> ::= [^\n]* ( $'\n'<lines> )*
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$__fzf_awk "$script" | # ( <counter>$'\t'<lines>$'\000' )*
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command $__fzf_awk "$script" | # ( <counter>$'\t'<lines>$'\000' )*
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FZF_DEFAULT_OPTS="$opts" $(__fzfcmd) --query "$READLINE_LINE"
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) || return
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READLINE_LINE=${output#*$'\t'}
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