Avoid running remote topgrade on the current host (fix #804) (#807)

Cargo.lock

@@ -1668,6 +1668,16 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "sys-info"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b3a0d0aba8bf96a0e1ddfdc352fc53b3df7f39318c71854910c3c4b024ae52c"
+dependencies = [
+ "cc",
+ "libc",
+]
+
 [[package]]
 name = "tar"
 version = "0.4.37"
@@ -1843,6 +1853,7 @@ dependencies = [
  "shellexpand",
  "structopt",
  "strum 0.22.0",
+ "sys-info",
  "tempfile",
  "thiserror",
  "tokio",

Cargo.toml

@@ -33,6 +33,7 @@ cfg-if = "1.0.0"
 tokio = { version = "1.5.0", features = ["process", "rt-multi-thread"] }
 futures = "0.3.14"
 regex = "1.5.3"
+sys-info = "0.9"
 
 [target.'cfg(target_os = "macos")'.dependencies]
 notify-rust = "4.5.0"

src/config.rs

@@ -1,19 +1,22 @@
-use super::utils::editor;
+use std::collections::BTreeMap;
+use std::fs::write;
+use std::path::PathBuf;
+use std::process::Command;
+use std::{env, fs};
+
 use anyhow::Result;
 use directories::BaseDirs;
 use log::{debug, LevelFilter};
 use pretty_env_logger::formatted_timed_builder;
 use regex::Regex;
 use serde::Deserialize;
-use std::collections::BTreeMap;
-use std::fs::write;
-use std::path::PathBuf;
-use std::process::Command;
-use std::{env, fs};
 use structopt::StructOpt;
 use strum::{EnumIter, EnumString, EnumVariantNames, IntoEnumIterator, VariantNames};
+use sys_info::hostname;
 use which_crate::which;
 
+use super::utils::editor;
+
 pub static EXAMPLE_CONFIG: &str = include_str!("../config.example.toml");
 
 #[allow(unused_macros)]
@@ -826,10 +829,16 @@ impl Config {
     str_value!(linux, emerge_update_flags);
 
     pub fn should_execute_remote(&self, remote: &str) -> bool {
-        self.opt
-            .remote_host_limit
-            .as_ref()
-            .map(|h| h.is_match(remote))
-            .unwrap_or(true)
+        if let Ok(hostname) = hostname() {
+            if remote == hostname {
+                return false;
+            }
+        }
+
+        if let Some(limit) = self.opt.remote_host_limit.as_ref() {
+            return limit.is_match(remote);
+        }
+
+        true
     }
 }