fedora: Add vendor scripts

These scripts can be manually updated by running the `make update`
command. When you do so, visually compare the diffs. This is to
ensure that nothing particularly naughty happened upstream.

Note that this is not a fool-proof solution since one can simply
modify the content returned by any other location a script requests.

.fedora/vendor/crystal-setup.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+cat > /etc/yum.repos.d/crystal.repo <<END
+[crystal]
+name = Crystal
+baseurl = http://dist.crystal-lang.org/rpm/
+END
+
+rpm --import http://dist.crystal-lang.org/rpm/RPM-GPG-KEY

.fedora/vendor/rustup-init.sh

@@ -0,0 +1,387 @@
+#!/bin/bash
+# Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+# file at the top-level directory of this distribution and at
+# http://rust-lang.org/COPYRIGHT.
+#
+# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+# option. This file may not be copied, modified, or distributed
+# except according to those terms.
+
+# 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
+
+RUSTUP_UPDATE_ROOT="https://static.rust-lang.org/rustup/dist"
+
+#XXX: If you change anything here, please make the same changes in setup_mode.rs
+usage() {
+    cat 1>&2 <<EOF
+rustup-init 1.0.0 (408ed84 2017-02-11)
+The installer for rustup
+
+USAGE:
+    rustup-init [FLAGS] [OPTIONS]
+
+FLAGS:
+    -v, --verbose           Enable verbose output
+    -y                      Disable confirmation prompt.
+        --no-modify-path    Don't configure the PATH environment variable
+    -h, --help              Prints help information
+    -V, --version           Prints version information
+
+OPTIONS:
+        --default-host <default-host>              Choose a default host triple
+        --default-toolchain <default-toolchain>    Choose a default toolchain to install
+        --default-toolchain none                   Do not install any toolchains
+EOF
+}
+
+main() {
+    downloader --check
+    need_cmd uname
+    need_cmd mktemp
+    need_cmd chmod
+    need_cmd mkdir
+    need_cmd rm
+    need_cmd rmdir
+
+    get_architecture || return 1
+    local _arch="$RETVAL"
+    assert_nz "$_arch" "arch"
+
+    local _ext=""
+    case "$_arch" in
+        *windows*)
+            _ext=".exe"
+            ;;
+    esac
+
+    local _url="$RUSTUP_UPDATE_ROOT/$_arch/rustup-init$_ext"
+
+    local _dir="$(mktemp -d 2>/dev/null || ensure mktemp -d -t rustup)"
+    local _file="$_dir/rustup-init$_ext"
+
+    local _ansi_escapes_are_valid=false
+    if [ -t 2 ]; then
+        if [ "${TERM+set}" = 'set' ]; then
+            case "$TERM" in
+                xterm*|rxvt*|urxvt*|linux*|vt*)
+                    _ansi_escapes_are_valid=true
+                ;;
+            esac
+        fi
+    fi
+
+    # check if we have to use /dev/tty to prompt the user
+    local need_tty=yes
+    for arg in "$@"; do
+        case "$arg" in
+            -h|--help)
+                usage
+                exit 0
+                ;;
+            -y)
+                # user wants to skip the prompt -- we don't need /dev/tty
+                need_tty=no
+                ;;
+            *)
+                ;;
+        esac
+    done
+
+    if $_ansi_escapes_are_valid; then
+        printf "\33[1minfo:\33[0m downloading installer\n" 1>&2
+    else
+        printf '%s\n' 'info: downloading installer' 1>&2
+    fi
+
+    ensure mkdir -p "$_dir"
+    ensure downloader "$_url" "$_file"
+    ensure chmod u+x "$_file"
+    if [ ! -x "$_file" ]; then
+        printf '%s\n' "Cannot execute $_file (likely because of mounting /tmp as noexec)." 1>&2
+        printf '%s\n' "Please copy the file to a location where you can execute binaries and run ./rustup-init$_ext." 1>&2
+        exit 1
+    fi
+
+
+
+    if [ "$need_tty" = "yes" ]; then
+        # The installer is going to want to ask for confirmation by
+        # reading stdin.  This script was piped into `sh` though and
+        # doesn't have stdin to pass to its children. Instead we're going
+        # to explicitly connect /dev/tty to the installer's stdin.
+        if [ ! -t 1 ]; then
+            err "Unable to run interactively. Run with -y to accept defaults, --help for additional options"
+        fi
+
+        ignore "$_file" "$@" < /dev/tty
+    else
+        ignore "$_file" "$@"
+    fi
+
+    local _retval=$?
+
+    ignore rm "$_file"
+    ignore rmdir "$_dir"
+
+    return "$_retval"
+}
+
+get_bitness() {
+    need_cmd head
+    # Architecture detection without dependencies beyond coreutils.
+    # ELF files start out "\x7fELF", and the following byte is
+    #   0x01 for 32-bit and
+    #   0x02 for 64-bit.
+    # The printf builtin on some shells like dash only supports octal
+    # escape sequences, so we use those.
+    local _current_exe_head=$(head -c 5 /proc/self/exe )
+    if [ "$_current_exe_head" = "$(printf '\177ELF\001')" ]; then
+        echo 32
+    elif [ "$_current_exe_head" = "$(printf '\177ELF\002')" ]; then
+        echo 64
+    else
+        err "unknown platform bitness"
+    fi
+}
+
+get_endianness() {
+    local cputype=$1
+    local suffix_eb=$2
+    local suffix_el=$3
+
+    # detect endianness without od/hexdump, like get_bitness() does.
+    need_cmd head
+    need_cmd tail
+
+    local _current_exe_endianness="$(head -c 6 /proc/self/exe | tail -c 1)"
+    if [ "$_current_exe_endianness" = "$(printf '\001')" ]; then
+        echo "${cputype}${suffix_el}"
+    elif [ "$_current_exe_endianness" = "$(printf '\002')" ]; then
+        echo "${cputype}${suffix_eb}"
+    else
+        err "unknown platform endianness"
+    fi
+}
+
+get_architecture() {
+
+    local _ostype="$(uname -s)"
+    local _cputype="$(uname -m)"
+
+    if [ "$_ostype" = Linux ]; then
+        if [ "$(uname -o)" = Android ]; then
+            local _ostype=Android
+        fi
+    fi
+
+    if [ "$_ostype" = Darwin -a "$_cputype" = i386 ]; then
+        # Darwin `uname -s` lies
+        if sysctl hw.optional.x86_64 | grep -q ': 1'; then
+            local _cputype=x86_64
+        fi
+    fi
+
+    case "$_ostype" in
+
+        Android)
+            local _ostype=linux-android
+            ;;
+
+        Linux)
+            local _ostype=unknown-linux-gnu
+            ;;
+
+        FreeBSD)
+            local _ostype=unknown-freebsd
+            ;;
+
+        NetBSD)
+            local _ostype=unknown-netbsd
+            ;;
+
+        DragonFly)
+            local _ostype=unknown-dragonfly
+            ;;
+
+        Darwin)
+            local _ostype=apple-darwin
+            ;;
+
+        MINGW* | MSYS* | CYGWIN*)
+            local _ostype=pc-windows-gnu
+            ;;
+
+        *)
+            err "unrecognized OS type: $_ostype"
+            ;;
+
+    esac
+
+    case "$_cputype" in
+
+        i386 | i486 | i686 | i786 | x86)
+            local _cputype=i686
+            ;;
+
+        xscale | arm)
+            local _cputype=arm
+            if [ "$_ostype" = "linux-android" ]; then
+                local _ostype=linux-androideabi
+            fi
+            ;;
+
+        armv6l)
+            local _cputype=arm
+            if [ "$_ostype" = "linux-android" ]; then
+                local _ostype=linux-androideabi
+            else
+                local _ostype="${_ostype}eabihf"
+            fi
+            ;;
+
+        armv7l | armv8l)
+            local _cputype=armv7
+            if [ "$_ostype" = "linux-android" ]; then
+                local _ostype=linux-androideabi
+            else
+                local _ostype="${_ostype}eabihf"
+            fi
+            ;;
+
+        aarch64)
+            local _cputype=aarch64
+            ;;
+
+        x86_64 | x86-64 | x64 | amd64)
+            local _cputype=x86_64
+            ;;
+
+        mips)
+            local _cputype="$(get_endianness $_cputype "" 'el')"
+            ;;
+
+        mips64)
+            local _bitness="$(get_bitness)"
+            if [ $_bitness = "32" ]; then
+                if [ $_ostype = "unknown-linux-gnu" ]; then
+                    # 64-bit kernel with 32-bit userland
+                    # endianness suffix is appended later
+                    local _cputype=mips
+                fi
+            else
+                # only n64 ABI is supported for now
+                local _ostype="${_ostype}abi64"
+            fi
+
+            local _cputype="$(get_endianness $_cputype "" 'el')"
+            ;;
+
+        ppc)
+            local _cputype=powerpc
+            ;;
+
+        ppc64)
+            local _cputype=powerpc64
+            ;;
+
+        ppc64le)
+            local _cputype=powerpc64le
+            ;;
+
+        *)
+            err "unknown CPU type: $_cputype"
+
+    esac
+
+    # Detect 64-bit linux with 32-bit userland
+    if [ $_ostype = unknown-linux-gnu -a $_cputype = x86_64 ]; then
+        if [ "$(get_bitness)" = "32" ]; then
+            local _cputype=i686
+        fi
+    fi
+
+    # Detect armv7 but without the CPU features Rust needs in that build,
+    # and fall back to arm.
+    # See https://github.com/rust-lang-nursery/rustup.rs/issues/587.
+    if [ $_ostype = "unknown-linux-gnueabihf" -a $_cputype = armv7 ]; then
+        if ensure grep '^Features' /proc/cpuinfo | grep -q -v neon; then
+            # At least one processor does not have NEON.
+            local _cputype=arm
+        fi
+    fi
+
+    local _arch="$_cputype-$_ostype"
+
+    RETVAL="$_arch"
+}
+
+say() {
+    echo "rustup: $1"
+}
+
+err() {
+    say "$1" >&2
+    exit 1
+}
+
+need_cmd() {
+    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
+}
+
+assert_nz() {
+    if [ -z "$1" ]; then err "assert_nz $2"; fi
+}
+
+# Run a command that should never fail. If the command fails execution
+# will immediately terminate with an error showing the failing
+# command.
+ensure() {
+    "$@"
+    need_ok "command failed: $*"
+}
+
+# This is just for indicating that commands' results are being
+# intentionally ignored. Usually, because it's being executed
+# as part of error handling.
+ignore() {
+    "$@"
+}
+
+# This wraps curl or wget. Try curl first, if not installed,
+# use wget instead.
+downloader() {
+    if check_cmd curl
+    then _dld=curl
+    elif check_cmd wget
+    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