Merge pull request #15 from loft-sh/fix/compatibility_linux

fix: better highlight Linux compatibility

README.md

@@ -11,4 +11,10 @@ To add this SSH provider from the CLI, use the `provider add` command. For examp
 devpod provider add https://github.com/loft-sh/devpod-provider-ssh/releases/download/$CURRENT_VERSION/provider.yaml
 ```
 
-For more detail, see the [DevPod Documentation](https://devpod.sh/docs/managing-providers/what-are-providers).
+## Compatibility
+
+We only support Linux machine as remote hosts.
+
+# Extra
+
+For more detail, see the [DevPod Documentation](https://devpod.sh/docs/managing-providers/what-are-providers).

pkg/ssh/ssh.go

@@ -93,7 +93,19 @@ func Init(provider *SSHProvider) error {
 		return fmt.Errorf("error: ssh output mismatch")
 	}
 
+	// We only support running on Linux ssh servers
+	out = new(bytes.Buffer)
+	err = execSSHCommand(provider, "uname", out)
+	if err != nil {
+		return returnSSHError(provider, "uname")
+	}
+	if out.String() != "Linux\n" {
+		fmt.Println(out.String())
+		return fmt.Errorf("error: SSH provider only works on Linux servers")
+	}
+
 	// If we're root, we won't have problems
+	out = new(bytes.Buffer)
 	err = execSSHCommand(provider, "id -ru", out)
 	if err != nil {
 		return returnSSHError(provider, "id -ru")
@@ -103,6 +115,7 @@ func Init(provider *SSHProvider) error {
 	}
 
 	// check that we have access to AGENT_PATH
+	out = new(bytes.Buffer)
 	agentDir := path.Dir(provider.Config.AgentPath)
 	err1 := execSSHCommand(provider, "mkdir -p "+agentDir, out)
 	err2 := execSSHCommand(provider, "test -w "+agentDir, out)