wehub-resource-sync
83 lines
2.8 KiB
Go
83 lines
2.8 KiB
Go
// Copyright 2025 Dolthub, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package sqlserver
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import (
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"fmt"
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"net"
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"os"
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"strconv"
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"github.com/dolthub/dolt/go/libraries/doltcore/dconfig"
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"github.com/dolthub/dolt/go/libraries/doltcore/servercfg"
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)
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// validateAndPrepareMCP performs coherence checks for MCP options and fails fast
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// when the specified port is unavailable. It also sets DOLT_ROOT_HOST dynamically
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// when MCP is enabled and the env var is not already set.
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func validateAndPrepareMCP(
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serverConfig servercfg.ServerConfig,
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mcpPort *int,
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mcpUser *string,
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mcpPassword *string,
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mcpDatabase *string,
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) error {
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// If any MCP-related arg is supplied without --mcp-port, error
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if mcpPort == nil {
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if mcpUser != nil && *mcpUser != "" {
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return fmt.Errorf("--%s requires --%s to be set", mcpUserFlag, mcpPortFlag)
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}
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if mcpPassword != nil && *mcpPassword != "" {
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return fmt.Errorf("--%s requires --%s to be set", mcpPasswordFlag, mcpPortFlag)
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}
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if mcpDatabase != nil && *mcpDatabase != "" {
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return fmt.Errorf("--%s requires --%s to be set", mcpDatabaseFlag, mcpPortFlag)
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}
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return nil
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}
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// --mcp-user is REQUIRED when --mcp-port is provided
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if mcpUser == nil || *mcpUser == "" {
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return fmt.Errorf("--%s is required when --%s is specified", mcpUserFlag, mcpPortFlag)
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}
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// Range and conflict checks
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if *mcpPort <= 0 || *mcpPort > 65535 {
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return fmt.Errorf("invalid value for --%s '%d'", mcpPortFlag, *mcpPort)
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}
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if serverConfig.Port() == *mcpPort {
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return fmt.Errorf("--%s must differ from --%s (both set to %d)", mcpPortFlag, portFlag, *mcpPort)
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}
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// If MCP is enabled and no explicit root host override exists, set DOLT_ROOT_HOST dynamically
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// to the SQL listener host, defaulting to 127.0.0.1 when unspecified or wildcard.
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if _, ok := os.LookupEnv(dconfig.EnvDoltRootHost); !ok {
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hostForRoot := serverConfig.Host()
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if hostForRoot == "" || hostForRoot == "0.0.0.0" || hostForRoot == "::" {
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hostForRoot = "127.0.0.1"
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}
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_ = os.Setenv(dconfig.EnvDoltRootHost, hostForRoot)
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}
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// Preflight port availability to fail fast before starting controller
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addr := net.JoinHostPort("0.0.0.0", strconv.Itoa(*mcpPort))
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l, err := net.Listen("tcp", addr)
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if err != nil {
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return fmt.Errorf("MCP port %d already in use: %v", *mcpPort, err)
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}
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_ = l.Close()
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return nil
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}
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