change init command & add integration test

- now need to specify device name via cmd arg
- can use private repository with ssh key or ssh-agent
- adding integration test utility crates

tests/cli.rs

@@ -0,0 +1,59 @@
+use assert_cmd::prelude::*;
+use assert_fs::prelude::*;
+
+mod cmd_init {
+    use anyhow::{Ok, Result};
+    use assert_cmd::{cargo::CommandCargoExt, Command};
+    use predicates::prelude::predicate;
+
+    #[test]
+    fn init_with_tmpdir() -> Result<()> {
+        let config_dir = assert_fs::TempDir::new()?;
+        let mut cmd = Command::cargo_bin("xdbm")?;
+        cmd.arg("-c")
+            .arg(config_dir.path())
+            .arg("init")
+            .arg("testdev");
+        cmd.assert().success().stdout(predicate::str::contains(""));
+        assert_eq!(
+            std::fs::read_to_string(config_dir.path().join("devname"))?,
+            "testdev\n"
+        );
+        Ok(())
+    }
+
+    #[test]
+    fn init_with_existing_repo() -> Result<()> {
+        // 1st device
+        let config_dir_1 = assert_fs::TempDir::new()?;
+        let mut cmd1 = Command::cargo_bin("xdbm")?;
+        cmd1.arg("-c")
+            .arg(config_dir_1.path())
+            .arg("init")
+            .arg("first");
+        cmd1.assert().success().stdout(predicate::str::contains(""));
+
+        // 2nd device
+        let config_dir_2 = assert_fs::TempDir::new()?;
+        let mut cmd2 = Command::cargo_bin("xdbm")?;
+        cmd2.arg("-c")
+            .arg(config_dir_2.path())
+            .arg("init")
+            .arg("second")
+            .arg("-r")
+            .arg(config_dir_1.path());
+        cmd2.assert().success().stdout(predicate::str::contains(""));
+
+        assert_eq!(
+            std::fs::read_to_string(config_dir_2.path().join("devname"))?,
+            "second\n"
+        );
+        assert!(
+            std::fs::read_to_string(config_dir_2.path().join("devices.yml"))?.contains("first")
+        );
+        assert!(
+            std::fs::read_to_string(config_dir_2.path().join("devices.yml"))?.contains("second")
+        );
+        Ok(())
+    }
+}