MeiliSearch/download-latest.sh

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#!/bin/sh
# COLORS
RED='\033[31m'
GREEN='\033[32m'
DEFAULT='\033[0m'
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# GLOBALS
BINARY_NAME='meilisearch'
GREP_SEMVER_REGEXP='v\([0-9]*\)[.]\([0-9]*\)[.]\([0-9]*\)$' # i.e. v[number].[number].[number]
# FUNCTIONS
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# 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 $latest
}
get_os() {
os_name=$(uname -s)
if [ "$os_name" != "Darwin" ]; then
os_name=$(cat /etc/os-release | grep '^ID=' | tr -d '"' | cut -d '=' -f 2)
fi
case "$os_name" in
'Darwin')
os='macos'
;;
'ubuntu' | 'debian')
os='linux'
;;
*)
failure_usage
exit 1
esac
echo "$os"
}
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success_usage() {
printf "$GREEN%s\n$DEFAULT" "MeiliSearch binary successfully downloaded as '$BINARY_NAME' file."
echo ''
echo 'Run it:'
echo ' $ ./meilisearch'
echo 'Usage:'
echo ' $ ./meilisearch --help'
}
failure_usage() {
printf "$RED%s\n$DEFAULT" 'ERROR: MeiliSearch binary is not available for your OS distribution yet.'
echo ''
echo 'However, you can easily compile the binary from the source files.'
echo 'Follow the steps on the docs: https://docs.meilisearch.com/advanced_guides/binary.html#how-to-compile-meilisearch'
}
# MAIN
os="$(get_os)"
latest="$(get_latest)"
echo "Downloading MeiliSearch binary $latest for $os..."
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release_file="meilisearch-$os-amd64"
link="https://github.com/meilisearch/MeiliSearch/releases/download/v$latest/$release_file"
curl -OL "$link"
mv "$release_file" "$BINARY_NAME"
chmod 744 "$BINARY_NAME"
success_usage