1 files changed, 109 insertions, 0 deletions
diff --git a/share/sfpm/download.sh b/share/sfpm/download.sh
new file mode 100644
index 0000000..0f3a0ec
--- /dev/null
+++ b/share/sfpm/download.sh
@@ -0,0 +1,109 @@
+DOWNLOADERS=(
+    curl
+    wget
+)
+
+
+function fetch_select()
+{
+    # Good chance this will not be used. cURL is sufficient as it is...
+    for prog in "${DOWNLOADERS[@]}"
+    do
+        fetcher=$(type -p ${prog})
+        if [[ ${fetcher} ]]; then
+            break
+        fi
+    done
+
+    if [[ ! ${fetcher} ]]; then
+        msg_error "Cannot continue; no program available to download files with."
+        exit 1
+    fi
+    echo ${fetcher}
+}
+
+
+function fetch()
+{
+    args=( --fail )
+    while (( "${#}" )); do
+        case "${1}" in
+            -r|--redirect)
+                args+=( -L )
+                shift
+                ;;
+            -O|--remote-name)
+                args+=( -O )
+                shift
+                ;;
+            -o|--output)
+                output="${2}"
+                shift 2
+                ;;
+            -s|--skip-exists)
+                skip=1
+                shift
+                ;;
+            -c|--checksum)
+                checksum=1
+                shift
+                ;;
+            --)
+                shift
+                break
+                ;;
+            -*|--*)
+                msg_error "Invalid argument: ${1}" >&2
+                exit 1
+                ;;
+            *)
+                url="${1}"
+                shift
+                ;;
+        esac
+    done
+
+    set -- "${args[@]}"
+
+    filename="$(basename ${url})"
+    msg "Fetching ${filename}"
+
+    if [[ ${output} ]]; then
+        output="${output}/${filename}"
+        filename_checksum="${output}.sha256"
+
+        if [[ -f ${filename_checksum} ]]; then
+            msg2 "Verifying checksum: ${filename_checksum}"
+            for line in "$(sha256sum -c ${filename_checksum})"
+            do
+                msg3 "${line}"
+            done
+
+            if (( $? )); then
+                exit 1
+            fi
+        fi
+
+        if (( ${skip} )) && [[ -f ${output} ]]; then
+            msg2 "Source exists: ${output}"
+            return 0
+        fi
+        args+=( -o ${output} )
+    fi
+
+    $(fetch_select) ${args[@]} ${url}
+    fetch_retval=$?
+    if (( ${fetch_retval} )); then
+        msg_error "Failed to fetch: (${fetch_retval}): ${url}"
+        exit 1
+    fi
+
+    if [[ ${output} ]]; then
+        if (( ${checksum} )); then
+            if [[ ! -f ${filename_checksum} ]]; then
+                sha256sum "${output}" > "${filename_checksum}"
+            fi
+        fi
+    fi
+}
+