feat: provision docker installation

pkg/ssh/ssh.go

@@ -0,0 +1,45 @@
+package ssh
+
+import (
+	"fmt"
+
+	"github.com/kevinburke/ssh_config"
+)
+
+// HostConfig is a SSH host config.
+type HostConfig struct {
+	Host         string
+	IdentityFile string
+	Port         string
+	User         string
+}
+
+// GetHostConfig retrieves a ~/.ssh/config config for a host.
+func GetHostConfig(hostname string, hasIdentityFile bool) (HostConfig, error) {
+	var hostConfig HostConfig
+
+	var host, user, port, idf string
+
+	if host = ssh_config.Get(hostname, "Hostname"); host == "" {
+		return hostConfig, fmt.Errorf("SSH hostname missing for %s from SSH config", hostname)
+	}
+
+	if user = ssh_config.Get(hostname, "User"); user == "" {
+		return hostConfig, fmt.Errorf("SSH user missing for %s from SSH config", hostname)
+	}
+
+	if port = ssh_config.Get(hostname, "Port"); port == "" {
+		return hostConfig, fmt.Errorf("SSH port missing for %s from SSH config", hostname)
+	}
+
+	if idf = ssh_config.Get(hostname, "IdentityFile"); idf == "" && hasIdentityFile {
+		return hostConfig, fmt.Errorf("SSH identity file missing for %s from SSH config", hostname)
+	}
+
+	hostConfig.Host = host
+	hostConfig.IdentityFile = idf
+	hostConfig.Port = port
+	hostConfig.User = user
+
+	return hostConfig, nil
+}