perf: install env checks

script/install.d/01-ssh.sh

@@ -5,29 +5,24 @@
 #   Print SSH key.
 #
 
-# skip if CODESPACES is set
-if [ -n "$CODESPACES" ]; then
-    log_warn "Running in a GitHub Codespace"
-    export SKIP_SSH_CONFIG=1
+# Skip in Codespaces
+[[ "$DOTS_ENV" == "codespaces" ]] && { log_pass "Skipping in Codespaces"; return 0; }
+
+# Skip if explicitly disabled
+[[ -n "$SKIP_SSH_CONFIG" ]] && { log_warn "Skipping SSH configuration"; return 0; }
+
+ssh_method="ed25519"
+
+ssh_target="${HOME}/.ssh"
+ssh_key="${ssh_target}/id_${ssh_method}"
+ssh_pub="${ssh_key}.pub"
+if [ ! -f "$ssh_key" ]; then
+    ssh-keygen \
+        -t "$ssh_method" \
+        -f "$ssh_key" \
+        -C "$(whoami)@$(hostname)-$(date -I)"
 fi
 
-# skip if SKIP_SSH_CONFIG is set
-if [ -z "$SKIP_SSH_CONFIG" ]; then
-    ssh_method="ed25519"
+cat "$ssh_pub"
 
-    ssh_target="${HOME}/.ssh"
-    ssh_key="${ssh_target}/id_${ssh_method}"
-    ssh_pub="${ssh_key}.pub"
-    if [ ! -f "$ssh_key" ]; then
-        ssh-keygen \
-            -t "$ssh_method" \
-            -f "$ssh_key" \
-            -C "$(whoami)@$(hostname)-$(date -I)"
-    fi
-
-    cat "$ssh_pub"
-
-    unset ssh_method ssh_target ssh_key ssh_pub
-else
-    log_warn "Skipping SSH configuration"
-fi
+unset ssh_method ssh_target ssh_key ssh_pub