Created
November 13, 2018 14:41
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Bash: Compare 2 dot separated version code
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| #!/bin/bash | |
| #compare 2 dot separated version codes. Return 0 if both identical. Return 1 if first is newer. Return 2 if second is newer | |
| vercomp () { | |
| if [[ $1 == $2 ]] | |
| then | |
| return 0 | |
| fi | |
| local IFS=. | |
| local i ver1=($1) ver2=($2) | |
| # fill empty fields in ver1 with zeros | |
| for ((i=${#ver1[@]}; i<${#ver2[@]}; i++)) | |
| do | |
| ver1[i]=0 | |
| done | |
| for ((i=0; i<${#ver1[@]}; i++)) | |
| do | |
| if [[ -z ${ver2[i]} ]] | |
| then | |
| # fill empty fields in ver2 with zeros | |
| ver2[i]=0 | |
| fi | |
| if ((10#${ver1[i]} > 10#${ver2[i]})) | |
| then | |
| return 1 | |
| fi | |
| if ((10#${ver1[i]} < 10#${ver2[i]})) | |
| then | |
| return 2 | |
| fi | |
| done | |
| return 0 | |
| } | |
| vercomp "3.1.153" "3.1.122" | |
| echo $? |
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