fix(log): error when logging object with circular refs

garden-service/src/logger/log-entry.ts

@@ -11,7 +11,7 @@ import * as nodeEmoji from "node-emoji"
 import { flatten } from "lodash"
 
 import { LogNode, LogLevel } from "./log-node"
-import { getChildEntries, findParentEntry } from "./util"
+import { getChildEntries, findParentEntry, sanitizeObject } from "./util"
 import { GardenError } from "../exceptions"
 import { Omit } from "../util/util"
 import { Logger } from "./logger"
@@ -196,11 +196,11 @@ export class LogEntry extends LogNode {
   }
 
   inspect() {
-    console.log(JSON.stringify({
+    console.log(JSON.stringify(sanitizeObject({
       ...this.opts,
       level: this.level,
       children: this.children,
-    }))
+    })))
   }
 
   filterBySection(section: string): LogEntry[] {

garden-service/src/logger/renderers.ts

@@ -10,7 +10,6 @@ import * as logSymbols from "log-symbols"
 import * as yaml from "js-yaml"
 import chalk from "chalk"
 import stripAnsi from "strip-ansi"
-import * as CircularJSON from "circular-json"
 import {
   curryRight,
   flow,
@@ -26,7 +25,7 @@ import { LogEntry } from "./log-entry"
 import { JsonLogEntry } from "./writers/json-terminal-writer"
 import { highlightYaml, deepFilter } from "../util/util"
 import { isNumber } from "util"
-import { printEmoji } from "./util"
+import { printEmoji, sanitizeObject } from "./util"
 
 export type ToRender = string | ((...args: any[]) => string)
 export type Renderer = [ToRender, any[]] | ToRender[]
@@ -91,7 +90,7 @@ export function renderError(entry: LogEntry) {
 
     if (!isEmpty(filteredDetail)) {
       try {
-        const sanitized = JSON.parse(CircularJSON.stringify(filteredDetail))
+        const sanitized = sanitizeObject(filteredDetail)
         const yamlDetail = yaml.safeDump(sanitized, { noRefs: true, skipInvalid: true })
         out += `\nError Details:\n${yamlDetail}`
       } catch (err) {

garden-service/src/logger/util.ts

@@ -8,6 +8,7 @@
 
 import * as nodeEmoji from "node-emoji"
 import chalk from "chalk"
+import * as CircularJSON from "circular-json"
 import { LogNode } from "./log-node"
 import { LogEntry, CreateOpts, EmojiName } from "./log-entry"
 
@@ -137,3 +138,10 @@ export function printFooter(log: LogEntry) {
 export function printWarningMessage(log: LogEntry, text: string) {
   return log.info({ emoji: "warning", msg: chalk.bold.yellow(text) })
 }
+
+/**
+ * Strips undefined values and circular references from an object.
+ */
+export function sanitizeObject(obj: any) {
+  return JSON.parse(CircularJSON.stringify(obj))
+}