From 7ed050316a183b5123a50cc8cd587cfd7b570a61 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20Ma=CC=88der?= <cma@nine.ch>
Date: Fri, 13 Oct 2017 09:43:16 +0200
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20Only=20build=20prerelease=20if=20ve?=
 =?UTF-8?q?rsion=20higher=20than=20stable?=
MIME-Version: 1.0
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---
 build-latest.sh | 24 +++++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/build-latest.sh b/build-latest.sh
index 7b79091..4a37237 100755
--- a/build-latest.sh
+++ b/build-latest.sh
@@ -1,10 +1,28 @@
 #!/bin/bash
 
-URL_LATEST=https://api.github.com/repos/digitalocean/netbox/releases
+URL_RELEASES=https://api.github.com/repos/digitalocean/netbox/releases
 
 JQ_LATEST="group_by(.prerelease) | .[] | sort_by(.published_at) | reverse | .[0] | select(.prerelease==${PRERELEASE-false}) | .tag_name"
 
-VERSION=$(curl "${URL_LATEST}" | jq -r "${JQ_LATEST}")
+CURL_OPTS="-s"
+
+VERSION=$(curl $CURL_OPTS "${URL_RELEASES}" | jq -r "${JQ_LATEST}")
+
+# Check if the prerelease version is actually higher than stable version
+if [ "${PRERELEASE}" == "true" ]; then
+  JQ_STABLE="group_by(.prerelease) | .[] | sort_by(.published_at) | reverse | .[0] | select(.prerelease==false) | .tag_name"
+  STABLE_VERSION=$(curl $CURL_OPTS "${URL_RELEASES}" | jq -r "${JQ_STABLE}")
+
+  MAJOR_STABLE=$(expr match "${STABLE_VERSION}" 'v\([0-9]\+\)')
+  MINOR_STABLE=$(expr match "${STABLE_VERSION}" 'v[0-9]\+\.\([0-9]\+\)')
+  MAJOR_UNSTABLE=$(expr match "${VERSION}" 'v\([0-9]\+\)')
+  MINOR_UNSTABLE=$(expr match "${VERSION}" 'v[0-9]\+\.\([0-9]\+\)')
+
+  if ( [ "$MAJOR_STABLE" -eq "$MAJOR_UNSTABLE" ] && [ "$MINOR_STABLE" -ge "$MINOR_UNSTABLE" ] ) \
+     || [ "$MAJOR_STABLE" -gt "$MAJOR_UNSTABLE" ]; then
+    echo "Latest unstable version ('$VERSION') is not higher than the latest stable version ('$STABLE_VERSION')."
+    exit 0
+  fi
+fi
 
 ./build.sh "${VERSION}" $@
-