rustup.rs: use wget if curl is unavailable

packages/addons/addon-depends/librespot-depends/rustup.rs/patches/rustup.rs-01_wget.patch

@@ -0,0 +1,115 @@
+From 299427ade578adb04a761ebbe7aacc07367fe37a Mon Sep 17 00:00:00 2001
+From: TitanSnow <sweeto@live.cn>
+Date: Sat, 21 Oct 2017 13:08:33 +0800
+Subject: [PATCH 1/2] fallbacks to wget if curl not installed
+
+modify 'rustup-init.sh' to support wget
+if curl not installed. This situation
+often happens on some linux distribution.
+---
+ rustup-init.sh | 28 ++++++++++++++++++++++++----
+ 1 file changed, 24 insertions(+), 4 deletions(-)
+
+diff --git a/rustup-init.sh b/rustup-init.sh
+index 7e089a1fb..a33a31377 100755
+--- a/rustup-init.sh
++++ b/rustup-init.sh
+@@ -9,8 +9,8 @@
+ # option. This file may not be copied, modified, or distributed
+ # except according to those terms.
+ 
+-# This is just a little script that can be curled from the internet to
+-# install rustup. It just does platform detection, curls the installer
++# This is just a little script that can be downloaded from the internet to
++# install rustup. It just does platform detection, downloads the installer
+ # and runs it.
+ 
+ set -u
+@@ -41,8 +41,8 @@ EOF
+ }
+ 
+ main() {
++    downloader --check
+     need_cmd uname
+-    need_cmd curl
+     need_cmd mktemp
+     need_cmd chmod
+     need_cmd mkdir
+@@ -100,7 +100,7 @@ main() {
+     fi
+ 
+     ensure mkdir -p "$_dir"
+-    ensure curl -sSfL "$_url" -o "$_file"
++    ensure downloader "$_url" "$_file"
+     ensure chmod u+x "$_file"
+     if [ ! -x "$_file" ]; then
+         printf '%s\n' "Cannot execute $_file (likely because of mounting /tmp as noexec)." 1>&2
+@@ -359,4 +359,24 @@ ignore() {
+     "$@"
+ }
+ 
++# This wraps curl or wget. Try curl first, if not installed,
++# use wget instead.
++downloader() {
++    if command -v curl > /dev/null 2>&1
++    then _dld=curl
++    elif command -v wget > /dev/null 2>&1
++    then _dld=wget
++    else _dld='curl or wget' # to be used in error message of need_cmd
++    fi
++
++    if [ "$1" = --check ]
++    then need_cmd "$_dld"
++    elif [ "$_dld" = curl ]
++    then curl -sSfL "$1" -o "$2"
++    elif [ "$_dld" = wget ]
++    then wget "$1" -O "$2"
++    else err "Unknown downloader"   # should not reach here
++    fi
++}
++
+ main "$@" || exit 1
+
+From faa08bd786b7282500cc4162a2f428484c891130 Mon Sep 17 00:00:00 2001
+From: Tibo <delor.thibault@gmail.com>
+Date: Thu, 8 Mar 2018 16:41:19 +1100
+Subject: [PATCH 2/2] Avoid duplication of command -v
+
+---
+ rustup-init.sh | 11 ++++++++---
+ 1 file changed, 8 insertions(+), 3 deletions(-)
+
+diff --git a/rustup-init.sh b/rustup-init.sh
+index a33a31377..e874aa7a3 100755
+--- a/rustup-init.sh
++++ b/rustup-init.sh
+@@ -331,11 +331,16 @@ err() {
+ }
+ 
+ need_cmd() {
+-    if ! command -v "$1" > /dev/null 2>&1
++    if ! check_cmd "$1"
+     then err "need '$1' (command not found)"
+     fi
+ }
+ 
++check_cmd() {
++    command -v "$1" > /dev/null 2>&1
++    return $?
++}
++
+ need_ok() {
+     if [ $? != 0 ]; then err "$1"; fi
+ }
+@@ -362,9 +367,9 @@ ignore() {
+ # This wraps curl or wget. Try curl first, if not installed,
+ # use wget instead.
+ downloader() {
+-    if command -v curl > /dev/null 2>&1
++    if check_cmd curl
+     then _dld=curl
+-    elif command -v wget > /dev/null 2>&1
++    elif check_cmd wget
+     then _dld=wget
+     else _dld='curl or wget' # to be used in error message of need_cmd
+     fi