2 files changed, 71 insertions, 0 deletions
diff --git a/rust/.gitignore b/rust/.gitignore
index 7988ddba..a3222e33 100644
--- a/rust/.gitignore
+++ b/rust/.gitignore
@@ -3,5 +3,6 @@ target/
 bin/
 fatcat-*.tar.gz
 fatcat-openapi/Cargo.toml.codegen
+openapi-generator-cli*.jar
 
 !.cargo
diff --git a/rust/openapi-generator-cli.sh b/rust/openapi-generator-cli.sh
new file mode 100755
index 00000000..e39ee086
--- /dev/null
+++ b/rust/openapi-generator-cli.sh
@@ -0,0 +1,70 @@
+#!/usr/bin/env bash
+####
+# Save as openapi-generator-cli on your PATH. chmod u+x. Enjoy.
+#
+# This script will query github on every invocation to pull the latest released version
+# of openapi-generator.
+#
+# If you want repeatable executions, you can explicitly set a version via
+#    OPENAPI_GENERATOR_VERSION
+# e.g. (in Bash)
+#    export OPENAPI_GENERATOR_VERSION=3.1.0
+#    openapi-generator-cli.sh
+# or
+#    OPENAPI_GENERATOR_VERSION=3.1.0 openapi-generator-cli.sh
+#
+# This is also helpful, for example, if you want want to evaluate a SNAPSHOT version.
+#
+# NOTE: Jars are downloaded on demand from maven into the same directory as this script
+# for every 'latest' version pulled from github. Consider putting this under its own directory.
+####
+set -o pipefail
+
+for cmd in {mvn,jq,curl}; do
+  if ! command -v ${cmd} > /dev/null; then
+    >&2 echo "This script requires '${cmd}' to be installed."
+    exit 1
+  fi
+done
+
+function latest.tag {
+  local uri="https://api.github.com/repos/${1}/releases"
+  local ver=$(curl -s ${uri} | jq -r 'first(.[]|select(.prerelease==false)).tag_name')
+  if [[ $ver == v* ]]; then
+    ver=${ver:1}
+  fi
+  echo $ver
+}
+
+ghrepo=openapitools/openapi-generator
+groupid=org.openapitools
+artifactid=openapi-generator-cli
+ver=${OPENAPI_GENERATOR_VERSION:-$(latest.tag $ghrepo)}
+
+jar=${artifactid}-${ver}.jar
+cachedir=${OPENAPI_GENERATOR_DOWNLOAD_CACHE_DIR}
+
+DIR=${cachedir:-"$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"}
+
+if [ ! -d "${DIR}" ]; then
+  mkdir -p "${DIR}"
+fi
+
+if [ ! -f ${DIR}/${jar} ]; then
+  repo="central::default::https://repo1.maven.org/maven2/"
+  if [[ ${ver} =~ ^.*-SNAPSHOT$ ]]; then
+      repo="central::default::https://oss.sonatype.org/content/repositories/snapshots"
+  fi
+  mvn org.apache.maven.plugins:maven-dependency-plugin:2.9:get \
+    -DremoteRepositories=${repo} \
+    -Dartifact=${groupid}:${artifactid}:${ver} \
+    -Dtransitive=false \
+    -Ddest=${DIR}/${jar}
+fi
+
+java -ea                          \
+  ${JAVA_OPTS}                    \
+  -Xms512M                        \
+  -Xmx1024M                       \
+  -server                         \
+  -jar ${DIR}/${jar} "$@"