Torjus Håkestad
14f5b31faf
Add a new "builder" capability to trigger Nix builds on a dedicated build host via NATS messaging. This allows pre-building NixOS configurations before deployment. New components: - Builder mode: subscribes to build.<repo>.* subjects, executes nix build - Build CLI command: triggers builds with progress tracking - MCP build tool: available with --enable-builds flag - Builder metrics: tracks build success/failure per repo and host - NixOS module: services.homelab-deploy.builder The builder uses a YAML config file to define allowed repositories with their URLs and default branches. Builds can target all hosts or specific hosts, with real-time progress updates. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
110 lines
3.0 KiB
Go
110 lines
3.0 KiB
Go
package mcp
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import (
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"context"
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"fmt"
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"strings"
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"github.com/mark3labs/mcp-go/mcp"
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deploycli "git.t-juice.club/torjus/homelab-deploy/internal/cli"
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"git.t-juice.club/torjus/homelab-deploy/internal/messages"
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)
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// BuildTool creates the build tool definition.
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func BuildTool() mcp.Tool {
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return mcp.NewTool(
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"build",
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mcp.WithDescription("Trigger a Nix build on the build server"),
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mcp.WithString("repo",
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mcp.Required(),
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mcp.Description("Repository name (must match builder config)"),
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),
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mcp.WithString("target",
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mcp.Description("Target hostname, or omit to build all hosts"),
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),
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mcp.WithBoolean("all",
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mcp.Description("Build all hosts in the repository (default if no target specified)"),
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),
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mcp.WithString("branch",
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mcp.Description("Git branch to build (uses repo default if not specified)"),
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),
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)
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}
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// HandleBuild handles the build tool.
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func (h *ToolHandler) HandleBuild(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
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repo, err := request.RequireString("repo")
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if err != nil {
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return mcp.NewToolResultError("repo is required"), nil
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}
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target := request.GetString("target", "")
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all := request.GetBool("all", false)
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branch := request.GetString("branch", "")
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// Default to "all" if no target specified
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if target == "" {
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if !all {
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all = true
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}
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target = "all"
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}
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if all && target != "all" {
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return mcp.NewToolResultError("cannot specify both target and all"), nil
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}
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cfg := deploycli.BuildConfig{
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NATSUrl: h.cfg.NATSUrl,
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NKeyFile: h.cfg.NKeyFile,
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Repo: repo,
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Target: target,
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Branch: branch,
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Timeout: h.cfg.Timeout,
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}
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var output strings.Builder
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branchStr := branch
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if branchStr == "" {
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branchStr = "(default)"
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}
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output.WriteString(fmt.Sprintf("Building %s target=%s branch=%s\n\n", repo, target, branchStr))
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result, err := deploycli.Build(ctx, cfg, func(resp *messages.BuildResponse) {
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switch resp.Status {
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case messages.BuildStatusStarted:
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output.WriteString(fmt.Sprintf("Started: %s\n", resp.Message))
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case messages.BuildStatusProgress:
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successStr := "..."
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if resp.HostSuccess != nil {
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if *resp.HostSuccess {
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successStr = "success"
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} else {
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successStr = "failed"
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}
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}
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output.WriteString(fmt.Sprintf("[%d/%d] %s: %s\n", resp.HostsCompleted, resp.HostsTotal, resp.Host, successStr))
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case messages.BuildStatusCompleted, messages.BuildStatusFailed:
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output.WriteString(fmt.Sprintf("\n%s\n", resp.Message))
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case messages.BuildStatusRejected:
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output.WriteString(fmt.Sprintf("Rejected: %s\n", resp.Message))
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}
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})
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if err != nil {
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return mcp.NewToolResultError(fmt.Sprintf("build failed: %v", err)), nil
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}
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if result.FinalResponse != nil {
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output.WriteString(fmt.Sprintf("\nBuild complete: %d succeeded, %d failed (%.1fs)\n",
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result.FinalResponse.Succeeded,
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result.FinalResponse.Failed,
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result.FinalResponse.TotalDurationSeconds))
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}
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if !result.AllSucceeded() {
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output.WriteString("WARNING: Some builds failed\n")
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}
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return mcp.NewToolResultText(output.String()), nil
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}
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