Added dependency checksv1.1

2 files changed, 24 insertions, 1 deletions

diff --git a/README.md b/README.md
index 4f6937c..eb8cdf9 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ The other options for Minecraft launchers are massive (e.g. MultiMC) and like ma
 - OpenBSD
 
 ## Dependencies
-* `jq`, `curl` and `nickle` - On Debian, you can install with `sudo apt install jq curl nickle`.
+* `jq` (1.7 and later), `curl` and `nickle` - On Debian, you can install with `sudo apt install curl nickle` and get `jq` from here: https://jqlang.github.io/jq/download/ - The version of `jq` shipped with a lot of distributions is apparently very old; you need 1.7 and later.
 * `uname`, `xargs`, `ls`, `cat`, `tr`, `mkdir`, `tee`, `dirname`, `sha1sum`, `sed`, `basename`, `date`, `xargs` - Listed for good measure, but you should almost certainly have all of these unless you are using an incomplete distribution/operating system.
 * A POSIX-compatible shell - If you are on Linux or a UNIX-based operating system, you almost certainly have one.
 * A Java runtime - Check with your distribution for installing. On Debian-based systems, the package is usually `default-jre` or `openjdk-<version>-jre`.
diff --git a/get_version.sh b/get_version.sh
index cae7101..c413459 100755
--- a/get_version.sh
+++ b/get_version.sh
@@ -1,5 +1,28 @@
 #!/usr/bin/env sh
 
+# Check for packages
+JQ_VERSION=$(jq --version 2>/dev/null)
+if [[ ${JQ_VERSION} == 'jq-1.3' || ${JQ_VERSION} == 'jq-1.4' || ${JQ_VERSION} == 'jq-1.5' || ${JQ_VERSION} == 'jq-1.6' ]]; then
+	echo 'ERROR: installed jq version is too old; must be at least 1.7'
+	exit 1
+elif [ -z ${JQ_VERSION} ]; then
+	echo 'ERROR: please install jq 1.7+'
+	exit 1
+fi
+
+NICKLE_LOCATION=$(which nickle)
+CURL_LOCATION=$(which curl)
+
+if [ ! -f "${NICKLE_LOCATION}" ]; then
+	echo "ERROR: please install Nickle"
+	exit 1
+fi
+
+if [ ! -f "${CURL_LOCATION}" ]; then
+	echo "ERROR: please install cURL"
+	exit 1
+fi
+
 # Only accepts 1 argument: the Minecraft version to download
 LOOOKING_FOR=
 if [ -z "${1}" ]; then