MeiliSearch/download-latest.sh

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#!/bin/sh
# GLOBALS
# Colors
RED='\033[31m'
GREEN='\033[32m'
DEFAULT='\033[0m'
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# Project name
PNAME='meilisearch'
# Version regexp i.e. v[number].[number].[number]
GREP_SEMVER_REGEXP='v\([0-9]*\)[.]\([0-9]*\)[.]\([0-9]*\)$'
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# GitHub API address
GITHUB_API='https://api.github.com/repos/meilisearch/meilisearch/releases'
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# GitHub Release address
GITHUB_REL='https://github.com/meilisearch/meilisearch/releases/download/'
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# FUNCTIONS
# semverParseInto and semverLT from: https://github.com/cloudflare/semver_bash/blob/master/semver.sh
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# 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
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eval $2=`echo $1 | sed -e "s#$RE#\1#"`
# MINOR
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eval $3=`echo $1 | sed -e "s#$RE#\2#"`
# PATCH
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eval $4=`echo $1 | sed -e "s#$RE#\3#"`
# SPECIAL
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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 $PATCH_B ]; then
return 0
fi
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if [ "_$SPECIAL_A" == '_' ] && [ "_$SPECIAL_B" == '_' ] ; then
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return 1
fi
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if [ "_$SPECIAL_A" == '_' ] && [ "_$SPECIAL_B" != '_' ] ; then
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return 1
fi
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if [ "_$SPECIAL_A" != '_' ] && [ "_$SPECIAL_B" == '_' ] ; then
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return 0
fi
if [ "_$SPECIAL_A" < "_$SPECIAL_B" ]; then
return 0
fi
return 1
}
# Get a token from: https://github.com/settings/tokens to increase rate limit (from 60 to 5000),
# make sure the token scope is set to 'public_repo'.
# Create GITHUB_PAT environment variable once you acquired the token to start using it.
# Returns the tag of the latest stable release (in terms of semver and not of release date).
get_latest() {
# temp_file is needed because the grep would start before the download is over
temp_file=$(mktemp -q /tmp/$PNAME.XXXXXXXXX)
if [ $? -ne 0 ]; then
echo "$0: Can't create temp file, bye bye.."
exit 1
fi
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if [ -z "$GITHUB_PAT" ]; then
curl -s $GITHUB_API > "$temp_file" || return 1
else
curl -H "Authorization: token $GITHUB_PAT" -s $GITHUB_API > "$temp_file" || return 1
fi
releases=$(cat "$temp_file" | \
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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
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latest=''
current_tag=''
for release_info in $releases; do
# Checking tag_name
if [ $i -eq 0 ]; then
# If it's not an alpha or beta release
if echo "$release_info" | grep -q "$GREP_SEMVER_REGEXP"; then
current_tag=$release_info
else
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current_tag=''
fi
i=1
# Checking draft boolean
elif [ $i -eq 1 ]; then
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if [ "$release_info" = 'true' ]; then
current_tag=''
fi
i=2
# Checking prerelease boolean
elif [ $i -eq 2 ]; then
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if [ "$release_info" = 'true' ]; then
current_tag=''
fi
i=0
# If the current_tag is valid
if [ "$current_tag" != '' ]; then
# If there is no latest yes
if [ "$latest" = '' ]; then
latest="$current_tag"
else
# Comparing latest and the current tag
semverLT $current_tag $latest
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'*)
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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')
# MacOS M1
if [ $os = 'macos' ]; then
archi='amd64'
else
archi='aarch64'
fi
;;
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'aarch64')
archi='aarch64'
;;
*)
return 1
esac
return 0
}
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success_usage() {
printf "$GREEN%s\n$DEFAULT" "Meilisearch $latest binary successfully downloaded as '$binary_name' file."
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echo ''
echo 'Run it:'
echo " $ ./$PNAME"
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echo 'Usage:'
echo " $ ./$PNAME --help"
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}
not_available_failure_usage() {
printf "$RED%s\n$DEFAULT" 'ERROR: Meilisearch binary is not available for your OS distribution or your architecture yet.'
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echo ''
echo 'However, you can easily compile the binary from the source files.'
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echo 'Follow the steps at the page ("Source" tab): https://docs.meilisearch.com/learn/getting_started/installation.html'
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}
fetch_release_failure_usage() {
echo ''
printf "$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'
}
fill_release_variables() {
# Fill $latest variable.
if ! get_latest; then
# TO CHANGE.
fetch_release_failure_usage
exit 1
fi
if [ "$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
}
download_binary() {
fill_release_variables
echo "Downloading Meilisearch binary $latest for $os, architecture $archi..."
case "$os" in
'windows')
release_file="$PNAME-$os-$archi.exe"
binary_name="$PNAME.exe"
;;
*)
release_file="$PNAME-$os-$archi"
binary_name="$PNAME"
esac
# Fetch the Meilisearch binary.
curl --fail -OL "$GITHUB_REL/$latest/$release_file"
if [ $? -ne 0 ]; then
fetch_release_failure_usage
exit 1
fi
mv "$release_file" "$binary_name"
chmod 744 "$binary_name"
success_usage
}
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# MAIN
main() {
download_binary
}
main