7e8ced534f
Use path based SHELL in Makefiles. It was suggested that this is a better solution for make for cases when there is no /usr/bin/env. See: https://github.com/purpleidea/mgmt/pull/694#discussion_r1015596204
62 lines
1.6 KiB
Bash
Executable File
62 lines
1.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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# shitty cpu count control, useful for live demos
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minimum=1 # don't decrease below this number of cpus
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maximum=8 # don't increase above this number of cpus
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count=1 # initial count
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factor=3
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function output() {
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count=$1 # arg!
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cat << EOF > /tmp/cpu-count
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$count
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EOF
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}
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#tput cuu 1 && tput el # remove last line
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str=''
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tnuoc=$((maximum-count)) # backwards count
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count2=$((count * factor))
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tnuoc2=$((tnuoc * factor))
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left=`yes '>' | head -$count2 | paste -s -d '' -`
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right=`yes ' ' | head -$tnuoc2 | paste -s -d '' -`
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str="${left}${right}"
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_min=$((minimum-1))
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_max=$((maximum+1))
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reset # clean up once...
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output $count # call function
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while true; do
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read -n1 -r -s -p "CPUs count is: $count; ${str} Press +/- key to adjust." key
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if [ "$key" = "q" ] || [ "$key" = "Q" ]; then
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echo # newline
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exit
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fi
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if [ ! "$key" = "+" ] && [ ! "$key" = "-" ] && [ ! "$key" = "=" ] && [ ! "$key" = "_" ]; then # wrong key
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reset # woops, reset it all...
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continue
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fi
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if [ "$key" == "+" ] || [ "$key" == "=" ]; then
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count=$((count+1))
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fi
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if [ "$key" == "-" ] || [ "$key" == "_" ]; then
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count=$((count-1))
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fi
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if [ $count -eq $_min ]; then # min
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count=$minimum
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fi
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if [ $count -eq $_max ]; then # max
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count=$maximum
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fi
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tnuoc=$((maximum-count)) # backwards count
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#echo "count is: $count"
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#echo "tnuoc is: $tnuoc"
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count2=$((count * factor))
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tnuoc2=$((tnuoc * factor))
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left=`yes '>' | head -$count2 | paste -s -d '' -`
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right=`yes ' ' | head -$tnuoc2 | paste -s -d '' -`
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str="${left}${right}"
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#echo "str is: $str"
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echo -ne '\r' # backup
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output $count # call function
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done
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