1 files changed, 24 insertions, 0 deletions
diff --git a/vendor/image/release.sh b/vendor/image/release.sh
new file mode 100755
index 0000000..ae164d3
--- /dev/null
+++ b/vendor/image/release.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+# Checks automatic preconditions for a release
+determine_new_version() {
+	grep "version = " Cargo.toml | sed -Ee 's/version = "(.*)"/\1/' | head -1
+}
+
+check_notexists_version() {
+	# Does the api information start with: '{"errors":'
+	[[ $(wget "https://crates.io/api/v1/crates/image/$1" -qO -) == "{\"errors\":"* ]]
+}
+
+check_release_description() {
+	major=${1%%.*}
+	minor_patch=${1#$major.}
+	minor=${minor_patch%%.*}
+	patch=${minor_patch#$minor.}
+	# We just need to find a fitting header line
+	grep -Eq "^### Version ${major}.${minor}$" CHANGES.md
+}
+
+version="$(determine_new_version)"
+check_release_description $version || { echo "Version does not have a release description"; exit 1; }
+check_notexists_version $version || { echo "Version $version appears already published"; exit 1; }
+