add resume support to dwl

profile.d/net.sh

@@ -36,20 +36,29 @@
 
 # ------------------------------------------------------------------------------
 # Download a resource using curl, wget, or fetch.
-# Usage: dwl [-t <seconds>] <url> [output_file]
+# Usage: dwl [-t <seconds>] [-r|--resume] <url> [output_file]
 dwl()
 {
     local timeout=""
+    local resume=0
+
+    case "${DWL_DEFAULT_RESUME,,}" in
+        1|true|yes|on)
+            resume=1
+            ;;
+    esac
 
     # Parse leading options before the URL.
     while [[ $# -gt 0 ]]; do
         case "$1" in
             --help|-h)
-                echo "Usage: dwl [-t <seconds>|--timeout <seconds>] <url> [output_file]"
+                echo "Usage: dwl [-t <seconds>|--timeout <seconds>] [-r|--resume] [--no-resume] <url> [output_file]"
                 echo "Downloads a resource using curl, wget, or fetch."
                 echo ""
                 echo "Arguments:"
                 echo "  -t, --timeout  Maximum time in seconds to wait for the transfer."
+                echo "  -r, --resume   Resume an interrupted download when possible (file output only)."
+                echo "      --no-resume  Disable resume mode even if enabled in config."
                 echo "  url            The full URL to download (http/https/ftp)."
                 echo "  output_file    (Optional) Path to save the file. If omitted, prints to stdout."
                 return 0
@@ -62,6 +71,14 @@ dwl()
                 timeout="$2"
                 shift 2
                 ;;
+            -r|--resume)
+                resume=1
+                shift
+                ;;
+            --no-resume)
+                resume=0
+                shift
+                ;;
             --)
                 shift
                 break
@@ -100,8 +117,12 @@ dwl()
         local args=(-sL)
         [[ -n "$timeout" ]] && args+=(--max-time "$timeout" --connect-timeout "$timeout")
         if [[ -z "$output" ]]; then
+            if (( resume == 1 )); then
+                echo "Warning: --resume requires an output file; ignoring resume mode for stdout." >&2
+            fi
             curl "${args[@]}" "$url"
         else
+            (( resume == 1 )) && args+=(-C -)
             curl "${args[@]}" -o "$output" "$url"
         fi
     }
@@ -110,6 +131,7 @@ dwl()
     {
         local args=(-q)
         [[ -n "$timeout" ]] && args+=(--timeout="$timeout")
+        (( resume == 1 )) && args+=(-c)
         if [[ -z "$output" ]]; then
             wget "${args[@]}" -O- "$url"
         else
@@ -121,6 +143,9 @@ dwl()
     {
         local args=()
         [[ -n "$timeout" ]] && args+=(-T "$timeout")
+        if (( resume == 1 )); then
+            echo "Warning: resume mode is not supported with fetch; continuing without resume." >&2
+        fi
         if [[ -z "$output" ]]; then
             fetch "${args[@]}" -o - "$url"
         else