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#!/usr/bin/env bash
set -euo pipefail
IFS=$'\n\t'
DATA_DIR="."
mkdir -p "$DATA_DIR"
VERSIONS_DIR="versions"
LIBRARIES_DIR="libraries"
NATIVES_DIR="natives"
ASSETS_DIR="assets"
GAME_DIR="run"
function auth (
CLIENT_ID="9e97542c-b7d5-4a02-a656-4559dad4590a"
DEVICE_CODE_URL="https://login.microsoftonline.com/consumers/oauth2/v2.0/devicecode"
TOKEN_URL="https://login.microsoftonline.com/consumers/oauth2/v2.0/token"
XBL_AUTH_URL="https://user.auth.xboxlive.com/user/authenticate"
XSTS_TOKEN_URL="https://xsts.auth.xboxlive.com/xsts/authorize"
MC_AUTH_URL="https://api.minecraftservices.com/authentication/login_with_xbox"
profile="${1:-"<unknown>"}"
if ! [[ -e "$DATA_DIR/profiles.json" ]]; then
printf '{}\n' > "$DATA_DIR/profiles.json"
fi
function login (
printf 'getting device code\n' >&2
res="$(curl -s -X POST "$DEVICE_CODE_URL" -H 'Content-Type: application/x-www-form-urlencoded' -d "client_id=$CLIENT_ID&scope=XboxLive.signin%20offline_access")"
device_code="$(<<<"$res" jq -r '.device_code')"
message="$(<<<"$res" jq -r '.message')"
printf '%s\n' "$message" >&2
printf 'waiting for token...\n' >&2
pending=true
while [[ "$pending" == true ]]; do
res="$(curl -s -X POST "$TOKEN_URL" -H 'Content-Type: application/x-www-form-urlencoded' -d "grant_type=urn:ietf:params:oauth:grant-type:device_code&client_id=$CLIENT_ID&device_code=$device_code")"
pending="$(<<<"$res" jq -r '.error == "authorization_pending"')"
sleep 1
done
printf '%s\n' "$res"
)
if [[ -z "$(jq -r --arg profile "$profile" '.[$profile].refresh_token // ""' "$DATA_DIR/profiles.json")" ]]; then
printf 'logging in\n' >&2
res="$(login)"
else
printf 'refreshing msa auth\n' >&2
refresh_token="$(jq -r --arg profile "$profile" '.[$profile].refresh_token // ""' "$DATA_DIR/profiles.json")"
res="$(curl -s -X POST "$TOKEN_URL" -H 'Content-Type: application/x-www-form-urlencoded' -d "grant_type=refresh_token&client_id=$CLIENT_ID&refresh_token=$refresh_token")"
fi
refresh_token="$(<<<"$res" jq -r '.refresh_token')"
msa_token="$(<<<"$res" jq -r '.access_token')"
profiles="$(jq --arg profile "$profile" --arg token "$refresh_token" '. + {$profile: {"refresh_token": $token, "type": "msa"}}' "$DATA_DIR/profiles.json")"
<<<"$profiles" cat > "$DATA_DIR/profiles.json"
printf 'authenticating with xbox live\n' >&2
req="$(jq -n --arg token "$msa_token" '{"Properties": {"AuthMethod": "RPS", "SiteName": "user.auth.xboxlive.com", "RpsTicket": "d=\($token)"}, "RelyingParty": "http://auth.xboxlive.com", "TokenType": "JWT"}')"
res="$(curl -s -X POST "$XBL_AUTH_URL" -H 'Content-Type: application/json' -H 'Accept: application/json' -d "$req")"
xuid="$(<<<"$res" jq -r '.DisplayClaims.xui[0].uhs')"
xbl_token="$(<<<"$res" jq -r '.Token')"
# not 100% sure this is *actually* the xuid, but the game doesnt seem to
# care, even if passed a nonsense value
profiles="$(jq --arg profile "$profile" --arg xuid "$xuid" '. + {$profile: .[$profile] + {"xuid": $xuid}}' "$DATA_DIR/profiles.json")"
<<<"$profiles" cat > "$DATA_DIR/profiles.json"
printf 'getting xsts token\n' >&2
req="$(jq -n --arg token "$xbl_token" '{"Properties": {"SandboxId": "RETAIL", "UserTokens": [ $token ]}, "RelyingParty": "rp://api.minecraftservices.com/", "TokenType": "JWT"}')"
res="$(curl -s -X POST "$XSTS_TOKEN_URL" -H 'Content-Type: application/json' -H 'Accept: application/json' -d "$req")"
xsts_token="$(<<<"$res" jq -r '.Token')"
printf 'authenticating with mincraft\n' >&2
req="$(jq -n --arg xuid "$xuid" --arg token "$xsts_token" '{"identityToken": "XBL3.0 x=\($xuid);\($token)"}')"
res="$(curl -s -X POST "$MC_AUTH_URL" -H 'Content-Type: application/json' -H 'Accept: application/json' -d "$req")"
mc_token="$(<<<"$res" jq -r '.access_token')"
profiles="$(jq --arg profile "$profile" --arg token "$mc_token" '. + {$profile: .[$profile] + {"access_token": $token}}' "$DATA_DIR/profiles.json")"
<<<"$profiles" cat > "$DATA_DIR/profiles.json"
# printf '%s\n' "$mc_token"
printf '%s\n' "$profile"
)
function update_profile (
MC_PROFILE_URL="https://api.minecraftservices.com/minecraft/profile"
profile="$1"
token="$(jq -r --arg profile "$profile" '.[$profile].access_token' "$DATA_DIR/profiles.json")"
printf 'getting minecraft profile\n' >&2
res="$(curl -s -X GET "$MC_PROFILE_URL" -H "Authorization: Bearer $token")"
if [[ -n "$(<<<"$res" jq -r '.error // ""')" ]]; then
printf 'error: user does not own minecraft\n' >&2
exit 1
fi
#TODO: hyphenate uuid, for :sparkles: style :sparkles:
profiles="$(<<<"$res" jq --arg profile "$profile" --slurpfile profiles "$DATA_DIR/profiles.json" '$profiles[0] + {"\(.name)": $profiles[0].[$profile] + {"player_name": .name, "uuid": .id}} | del(.["<unknown>"])')"
<<<"$profiles" cat > "$DATA_DIR/profiles.json"
jq --arg profile "$profile" '.[$profile]' "$DATA_DIR/profiles.json"
)
function update_metadata (
printf 'updating version manifest\n' >&2
mkdir -p "$VERSIONS_DIR"
curl --silent "https://piston-meta.mojang.com/mc/game/version_manifest_v2.json" | jq '{"latest": .latest, "versions": [.versions[] | {"key": .id, "value": .url}] | from_entries}' > "$VERSIONS_DIR/manifest.json"
version="${1:-"$(jq -r '.latest.release' "$VERSIONS_DIR/manifest.json")"}"
printf 'updating %s meta %s\n' "$version" >&2
mkdir -p "$VERSIONS_DIR/$version"
curl --silent -o "$VERSIONS_DIR/$version/meta.json" "$(jq -r --arg version "$version" '.versions[$version]' $VERSIONS_DIR/manifest.json)"
meta="$(jq -c --slurpfile info info.json -f meta.jq "$VERSIONS_DIR/$version/meta.json")"
printf 'updating %s asset index...\n' "$version" >&2
mkdir -p "$ASSETS_DIR/indexes"
assets_url="$(<<<"$meta" jq -r '.asset_index')"
curl --silent -o "$ASSETS_DIR/indexes/$(basename "$assets_url")" "$assets_url"
printf '%s\n' "$meta"
)
function launch (
profile="$(update_profile "$(auth "${2:-}")")"
printf '\n' >&2
meta="$(update_metadata "${1:-}")"
export LIBRARIES_DIR
function download_library {
if ! [[ -e "$LIBRARIES_DIR/${2:-}" ]]; then
printf '%s\n' "${1:-}" >&2
mkdir -p "$(dirname "$LIBRARIES_DIR/${2:-}")"
curl --silent -o "$LIBRARIES_DIR/${2:-}" "${3:-}"
fi
}
export -f download_library
export ASSETS_DIR
function download_asset {
if ! [[ -e "$ASSETS_DIR/objects/${2:-}" ]]; then
printf '%s\n' "${1:-}" >&2
mkdir -p "$(dirname "$ASSETS_DIR/objects/${2:-}")"
curl --silent -o "$ASSETS_DIR/objects/${2:-}" "https://resources.download.minecraft.net/${2:-}"
fi
}
export -f download_asset
#TODO: check hash
version="$(<<<"$meta" jq -r '.version')"
if ! [[ -e "$VERSIONS_DIR/$version/client.jar" ]]; then
printf 'downloading %s client jar...\n' "$version" >&2
<<<"$meta" jq -r '.client_url' | xargs curl --silent -o "$VERSIONS_DIR/$version/client.jar"
fi
printf 'downloading libraries...\n' >&2
<<<"$meta" jq -r '.libraries[] | "\(.name) \(.path) \(.url)"' | xargs -I {} "$SHELL" -c "download_library {}"
printf 'downloading assets...\n' >&2
jq -r '.objects | to_entries[] | "\(.key) \(.value.hash[:2])/\(.value.hash)"' "$ASSETS_DIR/indexes/$(basename "$(<<<"$meta" jq -r '.asset_index')")" | xargs -P 10 -I {} "$SHELL" -c "download_asset {}"
# if ! [[ -e "$VERSIONS_DIR/$version/log4j.xml" ]]; then
# printf 'downloading %s log4j config...\n' "$version" >&2
# <<<"$meta" jq -r '.logging_config' | xargs curl --silent -o "$VERSIONS_DIR/$version/log4j.xml"
# fi
function replace_placeholders {
cat - | sed \
-e "s/\${versions_directory}/$VERSIONS_DIR/g" \
-e "s/\${libraries_directory}/$LIBRARIES_DIR/g" \
-e "s/\${natives_directory}/$NATIVES_DIR/g" \
-e "s/\${assets_root}/$ASSETS_DIR/g" \
-e "s/\${game_directory}/$GAME_DIR/g" \
\
-e "s/\${launcher_name}/mcsh/g" \
-e "s/\${launcher_version}/v0.1.0/g" \
\
-e "s/\${auth_player_name}/$(<<<"$profile" jq -r '.player_name')/g" \
-e "s/\${auth_uuid}/$(<<<"$profile" jq -r '.uuid')/g" \
-e "s/\${auth_xuid}/$(<<<"$profile" jq -r '.xuid')/g" \
-e "s/\${user_type}/$(<<<"$profile" jq -r '.type')/g" \
-e "s/\${auth_access_token}/$(<<<"$profile" jq -r '.access_token')/g"
}
printf '\nstarting game :3\n\n' >&2
<<<"$meta" jq -r '.args.jvm + [.main_class] + .args.game | join(" ")' | replace_placeholders | xargs java
)
launch "$@"
|