Honor quiet update mode in installers

install.sh

@@ -457,7 +457,7 @@ try_install_prebuilt() {
   tmpdir="$(mktemp -d)"
   archive="$tmpdir/$(release_artifact_name)"
   checksum_file="$archive.sha256"
-  [ "$quiet" = "1" ] && echo "Trying Dosh prebuilt $(release_artifact_name)"
+  [ "$quiet" != "1" ] && echo "Trying Dosh prebuilt $(release_artifact_name)"
   need curl
   need tar
   if ! curl -fsL "$download_url" -o "$archive" 2>/dev/null; then
@@ -501,7 +501,7 @@ install_from_source() {
     need git
     mkdir -p "$(dirname "$update_cache")"
     if [ -d "$update_cache/.git" ]; then
-      [ "$quiet" = "1" ] && echo "Updating Dosh source"
+      [ "$quiet" != "1" ] && echo "Updating Dosh source"
       git -C "$update_cache" remote set-url origin "$repo"
       if [ "$quiet" = "1" ]; then
         git -C "$update_cache" fetch -q --depth 1 origin main
@@ -510,7 +510,7 @@ install_from_source() {
       fi
       git -C "$update_cache" checkout -q -B main FETCH_HEAD
     else
-      [ "$quiet" = "1" ] && echo "Downloading Dosh source"
+      [ "$quiet" != "1" ] && echo "Downloading Dosh source"
       rm -rf "$update_cache"
       if [ "$quiet" = "1" ]; then
         git clone -q --depth 1 --branch main "$repo" "$update_cache" >/dev/null
@@ -522,7 +522,7 @@ install_from_source() {
   fi
 
   cd "$src_dir"
-  [ "$quiet" = "1" ] && echo "Building Dosh $role"
+  [ "$quiet" != "1" ] && echo "Building Dosh $role"
   if [ "$role" = "client" ]; then
     if [ "$quiet" = "1" ]; then
       cargo build -q --release --bin dosh-client
@@ -577,7 +577,7 @@ if [ "$use_prebuilt" != "0" ]; then
     if [ "$binary_required" = "1" ]; then
       exit 1
     fi
-    [ "$quiet" = "1" ] && echo "Falling back to source build"
+    [ "$quiet" != "1" ] && echo "Falling back to source build"
     install_from_source
   fi
 else