#!/bin/sh

# COLORS

RED='\033[31m'

GREEN='\033[32m'

DEFAULT='\033[0m'

# GLOBALS

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#"`

#PATCH

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

}

# Get a token from https://github.com/settings/tokens to increasae rate limit (from 60 to 5000), make sure the token scope is set to 'public_repo'

# Create GITHUB_PAT enviroment variable once you aquired the token to start using it

# 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

if [ -z "$GITHUB_PAT" ]; then

curl -s 'https://api.github.com/repos/meilisearch/meilisearch/releases' > "$temp_file" || return 1

else

curl -H "Authorization: token $GITHUB_PAT" -s 'https://api.github.com/repos/meilisearch/meilisearch/releases' > "$temp_file" || return 1

fi

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"

return 0

}

# Gets the OS by setting the $os variable

# Returns 0 in case of success, 1 otherwise.

get_os() {

os_name=$(uname -s)

case "$os_name" in

'Darwin')

os='macos'

;;

'Linux')

os='linux'

;;

'MINGW'*)

os='windows'

;;

*)

return 1

esac

return 0

}

# Gets the architecture by setting the $archi variable

# Returns 0 in case of success, 1 otherwise.

get_archi() {

architecture=$(uname -m)

case "$architecture" in

'x86_64' | 'amd64' )

archi='amd64'

;;

'arm64')

if [ $os = 'macos' ]; then # MacOS M1

archi='amd64'

else

archi='aarch64'

fi

;;

'aarch64')

archi='aarch64'

;;

*)

return 1

esac

return 0

}

success_usage() {

printf "$GREEN%s\n$DEFAULT" "Meilisearch $latest binary successfully downloaded as '$binary_name' file."

echo ''

echo 'Run it:'

echo ' $ ./meilisearch'

echo 'Usage:'

echo ' $ ./meilisearch --help'

}

not_available_failure_usage() {

printf "$RED%s\n$DEFAULT" 'ERROR: Meilisearch binary is not available for your OS distribution or your architecture yet.'

echo ''

echo 'However, you can easily compile the binary from the source files.'

echo 'Follow the steps at the page ("Source" tab): https://docs.meilisearch.com/learn/getting_started/installation.html'

}

fetch_release_failure_usage() {

echo ''

printf "$RED%s\n$DEFAULT" 'ERROR: Impossible to get the latest stable version of Meilisearch.'

echo 'Please let us know about this issue: https://github.com/meilisearch/meilisearch/issues/new/choose'

}

# MAIN

# Fill $latest variable

if ! get_latest; then

fetch_release_failure_usage # TO CHANGE

exit 1

fi

if [ "$latest" = '' ]; then

fetch_release_failure_usage

exit 1

fi

# Fill $os variable

if ! get_os; then

not_available_failure_usage

exit 1

fi

# Fill $archi variable

if ! get_archi; then

not_available_failure_usage

exit 1

fi

echo "Downloading Meilisearch binary $latest for $os, architecture $archi..."

case "$os" in

'windows')

release_file="meilisearch-$os-$archi.exe"

binary_name='meilisearch.exe'

;;

*)

release_file="meilisearch-$os-$archi"

binary_name='meilisearch'

esac

# Fetch the Meilisearch binary

link="https://github.com/meilisearch/meilisearch/releases/download/$latest/$release_file"

curl --fail -OL "$link"

if [ $? -ne 0 ]; then

fetch_release_failure_usage

exit 1

fi

mv "$release_file" "$binary_name"

chmod 744 "$binary_name"

success_usage