#639 Remove the dependency on systemd (#729)

* The purpose of this change is to get rid of the hard-coded dependencies on systemd from tedge connect/disconnect,  to allow users to use other system managers, e.g. OpenRC, initd, etc..

* If /etc/tedge/system.toml exists, tedge connect/disconnect uses the service manager defined in the file.

* If the file is not given by user, tedge connect/disconnect uses /bin/systemctl as the service manager. (the same behaviour as we have it so far)

* Delete old service implementation files for BSD, OpenRC, systemd, and NULL.

* Add system.toml example files for BSD and OpenRC.

* Add a reference guide to explain the format of system.toml configuration file.

Signed-off-by: Rina Fujino <18257209+rina23q@users.noreply.github.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/crates/core/tedge/src/system_services/command_builder.rs b/crates/core/tedge/src/system_services/command_builder.rs
index 9d9e8ffb..bb66f313 100644
--- a/crates/core/tedge/src/system_services/command_builder.rs
+++ b/crates/core/tedge/src/system_services/command_builder.rs
@@ -13,8 +13,12 @@ impl CommandBuilder {
         }
     }
 
-    pub fn arg(mut self, arg: impl AsRef<OsStr>) -> CommandBuilder {
-        self.command.arg(arg);
+    pub fn args<I, S>(mut self, args: I) -> CommandBuilder
+    where
+        I: IntoIterator<Item = S>,
+        S: AsRef<OsStr>,
+    {
+        self.command.args(args);
         self
     }