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@guypursey
Last active January 5, 2024 12:26
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Semver with Git and Bash
V=$(git describe --tags --abbrev=0)
Y=$(date +"%Y")
m=$(date +"%m")
d=$(date +"%d")
today="$(date +"%Y")$(date +"%m")$(date +"%d")"
verregex="([0-9]+)"
preregex="([0-9]{8})\.([0-9]+)"
bldregex="(\+[a-zA-Z]+)?"
regex="^v$verregex\.$verregex\.$verregex-$preregex$bldregex$"
if [[ $V =~ $regex ]]
then
major="${BASH_REMATCH[1]}"
minor="${BASH_REMATCH[2]}"
patch="${BASH_REMATCH[3]}"
stamp="${BASH_REMATCH[4]}"
frank="${BASH_REMATCH[5]}"
echo "Most recent version: $V"
echo "Major: $major | Minor: $minor | Patch: $patch | Stamp: $stamp | Frank: $frank"
if [[ "$stamp" == "$today" ]]
then
frank="$(($frank + 1))"
echo "There was a commit earlier today: updating frank to $frank"
else
stamp="$today"
frank=0
echo "First commit today... starting frank at 0"
fi
if [ $# -eq 0 ];
then
echo "Updating tag/version with date only."
echo "Today is: $today"
else
if [[ "$1" == "patch" || "$1" == "minor" || "$1" == "major" ]]
then
echo "Updating $1 version in tag. Currently at ${!1}"
declare $1="$((${!1} + 1))"
echo "Will change $1 version to ${!1}"
if [[ "$1" == "minor" ]]
then
patch=0
elif [[ "$1" == "major" ]]
then
patch=0
minor=0
fi
fi
fi
echo "Now updated version: v$major.$minor.$patch-$stamp.$frank"
else
echo "The format of the previous Git tag doesn't look right..."
fi
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