MeiliSearch/.github/is-latest-release.sh

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#!/bin/sh
# Checks if the current tag should be the latest (in terms of semver and not of release date).
# Ex: previous tag -> v0.10.1
# new tag -> v0.8.12
# The new tag should not be the latest
# So it returns "false", the CI should not run for the release v0.8.2
# Used in GHA in publish-docker-latest.yml
# Returns "true" or "false" (as a string) to be used in the `if` in GHA
# GLOBAL
GREP_SEMVER_REGEXP='v\([0-9]*\)[.]\([0-9]*\)[.]\([0-9]*\)$' # i.e. v[number].[number].[number]
# FUNCTIONS
# semverParseInto and semverLT from https://github.com/cloudflare/semver_bash/blob/master/semver.sh
# usage: semverParseInto version major minor patch special
# version: the string version
# major, minor, patch, special: will be assigned by the function
semverParseInto() {
local RE='[^0-9]*\([0-9]*\)[.]\([0-9]*\)[.]\([0-9]*\)\([0-9A-Za-z-]*\)'
#MAJOR
eval $2=`echo $1 | sed -e "s#$RE#\1#"`
#MINOR
eval $3=`echo $1 | sed -e "s#$RE#\2#"`
#MINOR
eval $4=`echo $1 | sed -e "s#$RE#\3#"`
#SPECIAL
eval $5=`echo $1 | sed -e "s#$RE#\4#"`
}
# usage: semverLT version1 version2
semverLT() {
local MAJOR_A=0
local MINOR_A=0
local PATCH_A=0
local SPECIAL_A=0
local MAJOR_B=0
local MINOR_B=0
local PATCH_B=0
local SPECIAL_B=0
semverParseInto $1 MAJOR_A MINOR_A PATCH_A SPECIAL_A
semverParseInto $2 MAJOR_B MINOR_B PATCH_B SPECIAL_B
if [ $MAJOR_A -lt $MAJOR_B ]; then
return 0
fi
if [ $MAJOR_A -le $MAJOR_B ] && [ $MINOR_A -lt $MINOR_B ]; then
return 0
fi
if [ $MAJOR_A -le $MAJOR_B ] && [ $MINOR_A -le $MINOR_B ] && [ $PATCH_A -lt $PATCH_B ]; then
return 0
fi
if [ "_$SPECIAL_A" == "_" ] && [ "_$SPECIAL_B" == "_" ] ; then
return 1
fi
if [ "_$SPECIAL_A" == "_" ] && [ "_$SPECIAL_B" != "_" ] ; then
return 1
fi
if [ "_$SPECIAL_A" != "_" ] && [ "_$SPECIAL_B" == "_" ] ; then
return 0
fi
if [ "_$SPECIAL_A" < "_$SPECIAL_B" ]; then
return 0
fi
return 1
}
# Returns the tag of the latest stable release (in terms of semver and not of release date)
get_latest() {
temp_file='temp_file' # temp_file needed because the grep would start before the download is over
curl -s 'https://api.github.com/repos/meilisearch/MeiliSearch/releases' > "$temp_file"
releases=$(cat "$temp_file" | \
grep -E "tag_name|draft|prerelease" \
| tr -d ',"' | cut -d ':' -f2 | tr -d ' ')
# Returns a list of [tag_name draft_boolean prerelease_boolean ...]
# Ex: v0.10.1 false false v0.9.1-rc.1 false true v0.9.0 false false...
i=0
latest=""
current_tag=""
for release_info in $releases; do
if [ $i -eq 0 ]; then # Cheking tag_name
if echo "$release_info" | grep -q "$GREP_SEMVER_REGEXP"; then # If it's not an alpha or beta release
current_tag=$release_info
else
current_tag=""
fi
i=1
elif [ $i -eq 1 ]; then # Checking draft boolean
if [ "$release_info" = "true" ]; then
current_tag=""
fi
i=2
elif [ $i -eq 2 ]; then # Checking prerelease boolean
if [ "$release_info" = "true" ]; then
current_tag=""
fi
i=0
if [ "$current_tag" != "" ]; then # If the current_tag is valid
if [ "$latest" = "" ]; then # If there is no latest yet
latest="$current_tag"
else
semverLT $current_tag $latest # Comparing latest and the current tag
if [ $? -eq 1 ]; then
latest="$current_tag"
fi
fi
fi
fi
done
rm -f "$temp_file"
echo $latest
}
# MAIN
current_tag="$(echo $GITHUB_REF | tr -d 'refs/tags/')"
latest="$(get_latest)"
if [ "$current_tag" != "$latest" ]; then
# The current release tag is not the latest
echo "false"
else
# The current release tag is the latest
echo "true"
fi