Check before publish latest

.github/scripts/is-latest-release.sh

@@ -0,0 +1,48 @@
+#!/bin/sh
+
+# Used in our CIs to publish the latest Docker image.
+
+# Checks if the current tag ($GITHUB_REF) corresponds to the latest release tag on GitHub
+# Returns "true" or "false" (as a string) as a string.
+
+GITHUB_API='https://api.github.com/repos/meilisearch/meilisearch/releases'
+PNAME='meilisearch'
+
+# FUNCTIONS
+
+# Returns the version of the latest stable version of Meilisearch by setting the $latest variable.
+get_latest() {
+    # temp_file is needed because the grep would start before the download is over
+    temp_file=$(mktemp -q /tmp/$PNAME.XXXXXXXXX)
+    latest_release="$GITHUB_API/latest"
+
+    if [ $? -ne 0 ]; then
+        echo "$0: Can't create temp file."
+        exit 1
+    fi
+
+    if [ -z "$GITHUB_PAT" ]; then
+        curl -s "$latest_release" > "$temp_file" || return 1
+    else
+        curl -H "Authorization: token $GITHUB_PAT" -s "$latest_release" > "$temp_file" || return 1
+    fi
+
+    latest="$(cat "$temp_file" | grep '"tag_name":' | cut -d ':' -f2 | tr -d '"' | tr -d ',' | tr -d ' ')"
+
+    rm -f "$temp_file"
+    return 0
+}
+
+# MAIN
+current_tag="$(echo $GITHUB_REF | tr -d 'refs/tags/')"
+get_latest
+
+if [ "$current_tag" != "$latest" ]; then
+    # The current release tag is not the latest
+    echo "false"
+else
+    # The current release tag is the latest
+    echo "true"
+fi
+
+exit 0