1 files changed, 84 insertions, 0 deletions
diff --git a/cmd/blubber/main.go b/cmd/blubber/main.go
new file mode 100644
index 0000000..53009ea
--- /dev/null
+++ b/cmd/blubber/main.go
@@ -0,0 +1,84 @@
+// Package main provides the command line interface.
+//
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/pborman/getopt/v2"
+
+	"gerrit.wikimedia.org/r/blubber/config"
+	"gerrit.wikimedia.org/r/blubber/docker"
+	"gerrit.wikimedia.org/r/blubber/meta"
+)
+
+const parameters = "config.yaml variant"
+
+var (
+	showHelp    *bool   = getopt.BoolLong("help", 'h', "show help/usage")
+	showVersion *bool   = getopt.BoolLong("version", 'v', "show version information")
+	policyURI   *string = getopt.StringLong("policy", 'p', "", "policy file URI", "uri")
+)
+
+func main() {
+	getopt.SetParameters(parameters)
+	getopt.Parse()
+
+	if *showHelp {
+		getopt.Usage()
+		os.Exit(1)
+	}
+
+	if *showVersion {
+		fmt.Println(meta.FullVersion())
+		os.Exit(0)
+	}
+
+	args := getopt.Args()
+
+	if len(args) < 2 {
+		getopt.Usage()
+		os.Exit(1)
+	}
+
+	cfgPath, variant := args[0], args[1]
+
+	cfg, err := config.ReadConfigFile(cfgPath)
+
+	if err != nil {
+		if config.IsValidationError(err) {
+			log.Printf("%s is invalid:\n%v", cfgPath, config.HumanizeValidationError(err))
+			os.Exit(4)
+		} else {
+			log.Printf("Error reading %s: %v\n", cfgPath, err)
+			os.Exit(2)
+		}
+	}
+
+	if *policyURI != "" {
+		policy, err := config.ReadPolicyFromURI(*policyURI)
+
+		if err != nil {
+			log.Printf("Error loading policy from %s: %v\n", *policyURI, err)
+			os.Exit(5)
+		}
+
+		err = policy.Validate(*cfg)
+
+		if err != nil {
+			log.Printf("Configuration fails policy check against:\npolicy: %s\nviolation: %v\n", *policyURI, err)
+			os.Exit(6)
+		}
+	}
+
+	dockerFile, err := docker.Compile(cfg, variant)
+
+	if err != nil {
+		log.Printf("Error compiling config: %v\n", err)
+		os.Exit(3)
+	}
+
+	dockerFile.WriteTo(os.Stdout)
+}