feat(config/validation): add validation for negative numbers

lib/config/__snapshots__/validation.spec.ts.snap

@@ -38,7 +38,7 @@ exports[`config/validation validateConfig(config) catches invalid templates 1`]
 exports[`config/validation validateConfig(config) errors for all types 1`] = `
 [
   {
-    "message": "Configuration option \`azureWorkItemId\` should be an integer. Found: false (boolean)",
+    "message": "Configuration option \`azureWorkItemId\` should be an integer. Found: false (boolean).",
     "topic": "Configuration Error",
   },
   {

lib/config/options/index.ts

@@ -2046,6 +2046,7 @@ const options: RenovateOptions[] = [
     description:
       'Set sorting priority for PR creation. PRs with higher priority are created first, negative priority last.',
     type: 'integer',
+    allowNegative: true,
     default: 0,
     parents: ['packageRules'],
     cli: false,

lib/config/types.ts

@@ -454,6 +454,11 @@ export interface RenovateOptionBase {
    * For internal use only: add it to any config option that supports regex or glob matching
    */
   patternMatch?: boolean;
+
+  /**
+   * For internal use only: add it to any config option of type integer that supports negative integers
+   */
+  allowNegative?: boolean;
 }
 
 export interface RenovateArrayOption<

lib/config/validation.spec.ts

@@ -1273,6 +1273,41 @@ describe('config/validation', () => {
       expect(errors).toHaveLength(1);
       expect(warnings).toHaveLength(0);
     });
+
+    it('catches when negative number is used for integer type', async () => {
+      const config = {
+        azureWorkItemId: -2,
+      };
+      const { errors } = await configValidation.validateConfig('repo', config);
+      expect(errors).toMatchObject([
+        {
+          message:
+            'Configuration option `azureWorkItemId` should be a positive integer. Found negative value instead.',
+          topic: 'Configuration Error',
+        },
+      ]);
+    });
+
+    it('validates prPriority', async () => {
+      const config = {
+        packageRules: [
+          {
+            matchDepNames: ['somedep'],
+            prPriority: -2,
+          },
+          {
+            matchDepNames: ['some-other-dep'],
+            prPriority: 2,
+          },
+        ],
+      };
+      const { errors, warnings } = await configValidation.validateConfig(
+        'repo',
+        config,
+      );
+      expect(errors).toBeEmptyArray();
+      expect(warnings).toBeEmptyArray();
+    });
   });
 
   describe('validateConfig() -> globaOnly options', () => {
@@ -1645,13 +1680,30 @@ describe('config/validation', () => {
       );
       expect(warnings).toMatchObject([
         {
-          message: 'Configuration option `secrets` should be a JSON object.',
           topic: 'Configuration Error',
+          message:
+            'Configuration option `cacheTtlOverride.someField` should be an integer. Found: false (boolean).',
         },
         {
+          message: 'Configuration option `secrets` should be a JSON object.',
           topic: 'Configuration Error',
+        },
+      ]);
+    });
+
+    it('warns if negative number is used for integer type', async () => {
+      const config = {
+        prCommitsPerRunLimit: -2,
+      };
+      const { warnings } = await configValidation.validateConfig(
+        'global',
+        config,
+      );
+      expect(warnings).toMatchObject([
+        {
           message:
-            'Invalid `cacheTtlOverride.someField` configuration: value must be an integer.',
+            'Configuration option `prCommitsPerRunLimit` should be a positive integer. Found negative value instead.',
+          topic: 'Configuration Error',
         },
       ]);
     });

lib/config/validation.ts

@@ -45,6 +45,7 @@ let optionParents: Record<string, AllowedParents[]>;
 let optionGlobals: Set<string>;
 let optionInherits: Set<string>;
 let optionRegexOrGlob: Set<string>;
+let optionAllowsNegativeIntegers: Set<string>;
 
 const managerList = getManagerList();
 
@@ -88,6 +89,33 @@ function validatePlainObject(val: Record<string, unknown>): true | string {
   return true;
 }
 
+function validateNumber(
+  key: string,
+  val: unknown,
+  currentPath?: string,
+  subKey?: string,
+): ValidationMessage[] {
+  const errors: ValidationMessage[] = [];
+  const path = `${currentPath}${subKey ? '.' + subKey : ''}`;
+  if (is.number(val)) {
+    if (val < 0 && !optionAllowsNegativeIntegers.has(key)) {
+      errors.push({
+        topic: 'Configuration Error',
+        message: `Configuration option \`${path}\` should be a positive integer. Found negative value instead.`,
+      });
+    }
+  } else {
+    errors.push({
+      topic: 'Configuration Error',
+      message: `Configuration option \`${path}\` should be an integer. Found: ${JSON.stringify(
+        val,
+      )} (${typeof val}).`,
+    });
+  }
+
+  return errors;
+}
+
 function getUnsupportedEnabledManagers(enabledManagers: string[]): string[] {
   return enabledManagers.filter(
     (manager) => !allManagersList.includes(manager.replace('custom.', '')),
@@ -125,6 +153,7 @@ function initOptions(): void {
   optionTypes = {};
   optionRegexOrGlob = new Set();
   optionGlobals = new Set();
+  optionAllowsNegativeIntegers = new Set();
 
   for (const option of options) {
     optionTypes[option.name] = option.type;
@@ -144,6 +173,10 @@ function initOptions(): void {
     if (option.globalOnly) {
       optionGlobals.add(option.name);
     }
+
+    if (option.allowNegative) {
+      optionAllowsNegativeIntegers.add(option.name);
+    }
   }
 
   optionsInitialized = true;
@@ -333,14 +366,7 @@ export async function validateConfig(
             });
           }
         } else if (type === 'integer') {
-          if (!is.number(val)) {
-            errors.push({
-              topic: 'Configuration Error',
-              message: `Configuration option \`${currentPath}\` should be an integer. Found: ${JSON.stringify(
-                val,
-              )} (${typeof val})`,
-            });
-          }
+          errors.push(...validateNumber(key, val, currentPath));
         } else if (type === 'array' && val) {
           if (is.array(val)) {
             for (const [subIndex, subval] of val.entries()) {
@@ -956,14 +982,7 @@ async function validateGlobalConfig(
         });
       }
     } else if (type === 'integer') {
-      if (!is.number(val)) {
-        warnings.push({
-          topic: 'Configuration Error',
-          message: `Configuration option \`${currentPath}\` should be an integer. Found: ${JSON.stringify(
-            val,
-          )} (${typeof val}).`,
-        });
-      }
+      warnings.push(...validateNumber(key, val, currentPath));
     } else if (type === 'boolean') {
       if (val !== true && val !== false) {
         warnings.push({
@@ -1029,12 +1048,9 @@ async function validateGlobalConfig(
           }
         } else if (key === 'cacheTtlOverride') {
           for (const [subKey, subValue] of Object.entries(val)) {
-            if (!is.number(subValue)) {
-              warnings.push({
-                topic: 'Configuration Error',
-                message: `Invalid \`${currentPath}.${subKey}\` configuration: value must be an integer.`,
-              });
-            }
+            warnings.push(
+              ...validateNumber(key, subValue, currentPath, subKey),
+            );
           }
         } else {
           const res = validatePlainObject(val);