{"record":{"id":"d6b9f229f1bd3e44","repo":"flipped-aurora/gin-vue-admin","slug":"mcp-w-s","errorCode":null,"errorMessage":"构建 MCP 独立服务失败: %w, 输出: %s","messagePattern":"构建 MCP 独立服务失败: %w, 输出: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"server/mcp/standalone_manager.go","lineNumber":339,"sourceCode":"\tif err != nil {\n\t\treturn \"\", err\n\t}\n\n\tbinaryPath := filepath.Join(runtimeDir, managedBinaryName())\n\tsourceDir := filepath.Join(serverRoot, \"cmd\", \"mcp\")\n\n\tgoBin, lookErr := exec.LookPath(\"go\")\n\tif lookErr == nil && isDir(sourceDir) {\n\t\tbuildCtx, cancel := context.WithTimeout(context.Background(), mcpBuildTimeout)\n\t\tdefer cancel()\n\n\t\tcmd := exec.CommandContext(buildCtx, goBin, \"build\", \"-o\", binaryPath, \"./cmd/mcp\")\n\t\tcmd.Dir = serverRoot\n\t\toutput, err := cmd.CombinedOutput()\n\t\tif err != nil {\n\t\t\tmessage := strings.TrimSpace(string(output))\n\t\t\tif message != \"\" {\n\t\t\t\treturn \"\", fmt.Errorf(\"构建 MCP 独立服务失败: %w, 输出: %s\", err, message)\n\t\t\t}\n\t\t\treturn \"\", fmt.Errorf(\"构建 MCP 独立服务失败: %w\", err)\n\t\t}\n\t\treturn binaryPath, nil\n\t}\n\n\tif fileExists(binaryPath) {\n\t\treturn binaryPath, nil\n\t}\n\n\treturn \"\", errors.New(\"未检测到可用的 Go 环境，且本地没有可复用的 MCP 独立二进制\")\n}\n\nfunc resolveMCPServerRoot() string {\n\troot := strings.TrimSpace(global.GVA_CONFIG.AutoCode.Root)\n\tserverDir := strings.TrimSpace(global.GVA_CONFIG.AutoCode.Server)\n\tif serverDir == \"\" {\n\t\tserverDir = \"server\"","sourceCodeStart":321,"sourceCodeEnd":357,"githubUrl":"https://github.com/flipped-aurora/gin-vue-admin/blob/3136500ef380842b0eb6c4daa87c3f8a47fcf9e0/server/mcp/standalone_manager.go#L321-L357","documentation":"ensureManagedBinary runs `go build -o <binaryPath> ./cmd/mcp` in the server root and fails when the build errors AND go's CombinedOutput produced a non-empty message; the compiler/toolchain output is appended to the wrapped error so the developer sees the actual compile failure.","triggerScenarios":"Building the MCP standalone binary fails with diagnostics: syntax/type errors in the mcp package, missing/unresolved imports, Go module issues (go.mod mismatch), wrong Go version, or vendor inconsistencies — with build output captured.","commonSituations":"Local code changes to ./cmd/mcp or its dependencies that don't compile; running with an older Go toolchain than go.mod requires; GOFLAGS/GOPROXY issues blocking module download; disk full during build.","solutions":["Read the appended build output in the error — it names the exact file/line failing to compile; fix that code error first.","Run `go build -o /tmp/mcp-test ./cmd/mcp` manually in server/ to reproduce and iterate.","Check `go version` against the go.mod Go directive; upgrade the toolchain if needed.","Run `go mod tidy` / verify GOPROXY access if imports fail to resolve.","Free disk space if the build fails on write errors."],"exampleFix":"// before (compile error in cmd/mcp)\nserver/mcp/handlers.go:12:5: undefined: Foo\n// after: fix the code\n// server/mcp/handlers.go\n- result := Foo()\n+ result := NewFoo()\n// then rebuild: go build -o bin/mcp ./cmd/mcp","handlingStrategy":"try-catch","validationCode":"// pre-flight compile check before managed start\nout, err := exec.Command(\"go\", \"vet\", \"./cmd/mcp\").CombinedOutput()\nif err != nil {\n    return fmt.Errorf(\"cmd/mcp does not compile: %s\", out)\n}","typeGuard":null,"tryCatchPattern":"if _, err := ensureManagedBinary(serverRoot); err != nil {\n    if msg, ok := extractBuildOutput(err); ok {\n        log.Printf(\"fix compile errors first:\\n%s\", msg)\n    }\n    return err\n}","preventionTips":["Run go build ./... or go vet in CI before deploying.","Keep the local Go toolchain version >= the go.mod directive.","Run go mod tidy after dependency changes and vendor consistently.","Don't hand-edit generated files under cmd/mcp without compiling locally first."],"tags":["build","go","mcp","compile-error"],"backgroundTag":"build-failed","analyzedSha":"3136500ef380842b0eb6c4daa87c3f8a47fcf9e0","analyzedAt":"2026-08-31T13:50:02.721Z","schemaVersion":2},"datasetVersion":"2026-08-31T19:17:28.585Z"}