[ci][cli] Allow invoking generate-samples.sh with single file + args

bin/generate-samples.sh

@@ -6,21 +6,61 @@ declare cwd="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 declare root="$(cd "$cwd" && cd ../ && pwd)"
 declare executable="${root}/modules/openapi-generator-cli/target/openapi-generator-cli.jar"
 
-echo "# START SCRIPT: $0"
-echo "This script generates all configs under bin/configs by default."
-echo "You may generate a targeted script or set of scripts using glob patterns."
-echo "For example: $0 bin/configs/java-*"
-echo ""
-echo "Please press CTRL+C to stop or the script will continue in 5 seconds."
-
-sleep 5
 if [ ! -f "$executable" ]; then
   (cd "${root}" && mvn -B --no-snapshot-updates clean package -DskipTests=true -Dmaven.javadoc.skip=true -Djacoco.skip=true)
 fi
 
-export JAVA_OPTS="${JAVA_OPTS} -server -Duser.timezone=UTC"
+export JAVA_OPTS="${JAVA_OPTS} -ea -server -Duser.timezone=UTC"
 
-configs=${@:-"${root}"/bin/configs/*.yaml}
+files=()
+args=()
+end_option=false
+while [[ $# -gt 0 ]]; do
+  key="$1"
+  if [ "--" == "$key" ]; then
+    end_option=true
+  else
+    if [[ "$end_option" = true ]]; then
+      args+=("$1")
+    else
+      files+=("$1")
+    fi
+  fi
+  shift
+done
+
+header="# START SCRIPT: $0
+This script generates all configs under bin/configs by default.
+You may generate a targeted script or set of scripts using glob patterns.
+
+For example:
+    $0 bin/configs/java-*
+
+You may generate a single config with additional options if you use -- to
+separate the single config file from the generator arguments.
+
+For example:
+    $0 bin/configs/java-vertx.yaml -- --global-property debugModels=true
+
+"
+
+echo "$header"
+
+if [[ ${#files[@]} -eq 1 && "${files[0]}" != *'*'* ]]; then
+    # shellcheck disable=SC2086
+    # shellcheck disable=SC2068
+    java ${JAVA_OPTS} -jar "$executable" generate -c ${files[0]} ${args[@]}
+else
+    echo "Please press CTRL+C to stop or the script will continue in 5 seconds."
+
+    sleep 5
+
+    if [ ${#files[@]} -eq 0 ]; then
+      files=("${root}"/bin/configs/*.yaml)
+    fi
+
+    # shellcheck disable=SC2086
+    # shellcheck disable=SC2068
+    java ${JAVA_OPTS} -jar "$executable" batch --includes-base-dir "${root}" --fail-fast  -- ${files[@]}
+fi
 
-# shellcheck disable=SC2086
-java $JAVA_OPTS -jar "$executable" batch --includes-base-dir "${root}" --fail-fast  -- $configs

bin/utils/ensure-up-to-date

@@ -8,11 +8,8 @@ declare root="$(cd "$cwd" && cd ../../ && pwd)"
 declare executable="${root}/modules/openapi-generator-cli/target/openapi-generator-cli.jar"
 
 echo "# START SCRIPT: $0"
-
 echo "IMPORTANT: this script should be run by the CI (e.g. Shippable) to ensure that the 'samples/' folder is up to date."
-echo "Please press CTRL+C to stop or the script will continue in 5 seconds."
-
-sleep 5
+echo ""
 
 "${root}/bin/generate-samples.sh"
 

modules/openapi-generator-cli/src/main/java/org/openapitools/codegen/cmd/Generate.java

@@ -29,6 +29,7 @@
 import java.util.List;
 import java.util.stream.Stream;
 
+import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.*;
 import org.openapitools.codegen.config.CodegenConfigurator;
 import org.slf4j.Logger;
@@ -52,8 +53,8 @@ public class Generate extends OpenApiGeneratorCommand {
             description = "where to write the generated files (current dir by default)")
     private String output = "";
 
-    @Option(name = {"-i", "--input-spec"}, title = "spec file", required = true,
-            description = "location of the OpenAPI spec, as URL or file (required)")
+    @Option(name = {"-i", "--input-spec"}, title = "spec file",
+            description = "location of the OpenAPI spec, as URL or file (required if not loaded via config using -c)")
     private String spec;
 
     @Option(name = {"-t", "--template-dir"}, title = "template directory",
@@ -264,6 +265,10 @@ public void execute() {
             if (configFile != null && configFile.length() > 0) {
                 // attempt to load from configFile
                 configurator = CodegenConfigurator.fromFile(configFile);
+            } else if (StringUtils.isEmpty(spec)) {
+                // if user doesn't pass configFile and does not pass spec, we can fail immediately because one of these two is required to run.
+                System.err.println("[error] Required option '-i' is missing");
+                System.exit(1);
             }
 
             // if a config file wasn't specified, or we were unable to read it
@@ -295,11 +300,9 @@ public void execute() {
             configurator.setInputSpec(spec);
         }
 
+        // Generator name should not be validated here, as it's validated in toClientOptInput
         if (isNotEmpty(generatorName)) {
             configurator.setGeneratorName(generatorName);
-        } else {
-            System.err.println("[error] A generator name (--generator-name / -g) is required.");
-            System.exit(1);
         }
 
         if (isNotEmpty(output)) {

modules/openapi-generator/src/main/java/org/openapitools/codegen/config/CodegenConfigurator.java

@@ -466,7 +466,7 @@ public CodegenConfigurator setVerbose(boolean verbose) {
 
     @SuppressWarnings("WeakerAccess")
     public Context<?> toContext() {
-        Validate.notEmpty(generatorName, "language/generatorName must be specified");
+        Validate.notEmpty(generatorName, "generator name must be specified");
         Validate.notEmpty(inputSpec, "input spec must be specified");
 
         if (isEmpty(templatingEngineName)) {