scripts : add hf.sh helper script (#5501)

* scripts : add hf.sh helper scripts

* hf : add error logs

* hf : add support for --repo and --file

scripts/hf.sh

@@ -0,0 +1,107 @@
+#!/bin/bash
+#
+# Shortcut for downloading HF models
+#
+# Usage:
+#   ./main -m $(./examples/hf.sh https://huggingface.co/TheBloke/Mixtral-8x7B-v0.1-GGUF/resolve/main/mixtral-8x7b-v0.1.Q4_K_M.gguf)
+#   ./main -m $(./examples/hf.sh --url https://huggingface.co/TheBloke/Mixtral-8x7B-v0.1-GGUF/blob/main/mixtral-8x7b-v0.1.Q4_K_M.gguf)
+#   ./main -m $(./examples/hf.sh --repo TheBloke/Mixtral-8x7B-v0.1-GGUF --file mixtral-8x7b-v0.1.Q4_K_M.gguf)
+#
+
+# all logs go to stderr
+function log {
+    echo "$@" 1>&2
+}
+
+function usage {
+    log "Usage: $0 [[--url] <url>] [--repo <repo>] [--file <file>] [-h|--help]"
+    exit 1
+}
+
+# check for curl or wget
+function has_cmd {
+    if ! [ -x "$(command -v $1)" ]; then
+        return 1
+    fi
+}
+
+if has_cmd wget; then
+    cmd="wget -q --show-progress -c -O %s %s"
+elif has_cmd curl; then
+    cmd="curl -C - -f -o %s -L %s"
+else
+    log "[E] curl or wget not found"
+    exit 1
+fi
+
+url=""
+repo=""
+file=""
+
+# parse args
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        --url)
+            url="$2"
+            shift 2
+            ;;
+        --repo)
+            repo="$2"
+            shift 2
+            ;;
+        --file)
+            file="$2"
+            shift 2
+            ;;
+        -h|--help)
+            usage
+            ;;
+        *)
+            url="$1"
+            shift
+            ;;
+    esac
+done
+
+if [ -n "$repo" ] && [ -n "$file" ]; then
+    url="https://huggingface.co/$repo/resolve/main/$file"
+fi
+
+if [ -z "$url" ]; then
+    log "[E] missing --url"
+    usage
+fi
+
+# check if the URL is a HuggingFace model, and if so, try to download it
+is_url=false
+
+if [[ ${#url} -gt 22 ]]; then
+    if [[ ${url:0:22} == "https://huggingface.co" ]]; then
+        is_url=true
+    fi
+fi
+
+if [ "$is_url" = false ]; then
+    log "[E] invalid URL, must start with https://huggingface.co"
+    exit 0
+fi
+
+# replace "blob/main" with "resolve/main"
+url=${url/blob\/main/resolve\/main}
+
+basename=$(basename $url)
+
+log "[+] attempting to download $basename"
+
+if [ -n "$cmd" ]; then
+    cmd=$(printf "$cmd" "$basename" "$url")
+    log "[+] $cmd"
+    if $cmd; then
+        echo $basename
+        exit 0
+    fi
+fi
+
+log "[-] failed to download"
+
+exit 1