vendor/github.com/multiformats/go-multiaddr-net/bin/dist_get

   1 #!/bin/bash
   2
   3 die() {
   4         echo "$@" >&2
   5         exit 1
   6 }
   7
   8 have_binary() {
   9         type "$1" > /dev/null 2> /dev/null
  10 }
  11
  12 check_writeable() {
  13         printf "" > "$1" && rm "$1"
  14 }
  15
  16 download() {
  17         local url="$1"
  18         local output="$2"
  19
  20         if [ -z "$url" ] || [ -z "$output" ]; then
  21                 die "download takes exactly two arguments. was given '$@'"
  22         fi
  23
  24         if ! check_writeable "$output"; then
  25                 die "download error: cannot write to $output"
  26         fi
  27
  28         if have_binary wget; then
  29                 printf 'Using wget to download "%s" to "%s"\n' "$url" "$output"
  30                 wget "$url" -O "$output"
  31         elif have_binary curl; then
  32                 printf 'Using curl to download "%s" to "%s"\n' "$url" "$output"
  33                 curl --silent "$url" > "$output"
  34         elif have_binary fetch; then
  35                 printf 'Using fetch to download "%s" to "%s"\n' "$url" "$output"
  36                 fetch "$url" -o "$output"
  37         else
  38                 die "no binary found to download $url. exiting."
  39         fi
  40 }
  41
  42 unarchive() {
  43         local archivetype="$1"
  44         local infile="$2"
  45         local outfile="$3"
  46         local distname="$4"
  47
  48         if ! check_writeable "$outfile"; then
  49                 die "unarchive error: cannot write to $outfile"
  50         fi
  51
  52         case $archivetype in
  53                 tar.gz)
  54                         if have_binary tar; then
  55                                 echo "==> using 'tar' to extract binary from archive"
  56                                 cat "$infile" | tar -O -z -x "$distname/$distname" > "$outfile"
  57                         else
  58                                 die "no binary on system for extracting tar files"
  59                         fi
  60                         ;;
  61                 zip)
  62                         if have_binary unzip; then
  63                                 echo "==> using 'unzip' to extract binary from archive"
  64                                 unzip -p "$infile" "$distname/$distname" > "$outfile"
  65                         else
  66                                 die "no installed method for extracting .zip archives"
  67                         fi
  68                         ;;
  69                 *)
  70                         die "unrecognized archive type '$archivetype'"
  71         esac
  72
  73         chmod +x "$outfile"
  74 }
  75
  76 get_go_vars() {
  77         if [ ! -z "$GOOS" ] && [ ! -z "$GOARCH" ]; then
  78                 printf "%s-%s" "$GOOS" "$GOARCH"
  79         fi
  80
  81         if have_binary go; then
  82                 printf "%s-%s" "$(go env GOOS)" "$(go env GOARCH)"
  83         else
  84                 die "no way of determining system GOOS and GOARCH\nPlease manually set GOOS and GOARCH then retry."
  85         fi
  86 }
  87
  88 mkurl() {
  89         local name="$1"
  90         local vers="$2"
  91         local archive="$3"
  92
  93         local govars=$(get_go_vars)
  94
  95         echo "http://dist.ipfs.io/$name/$vers/${name}_${vers}_$govars.$archive"
  96 }
  97
  98 distname="$1"
  99 outpath="$2"
 100 version="$3"
 101
 102 if [ -z "$distname" ] || [ -z "$outpath" ] || [ -z "$version" ]; then
 103         die "usage: dist_get <distname> <outpath> <version>"
 104 fi
 105
 106 if [ ${version:0:1} != "v" ]; then
 107         echo "invalid version '$version'" >&2
 108         die "versions must begin with 'v', for example: v0.4.0"
 109 fi
 110
 111 # TODO: don't depend on the go tool being installed to detect this
 112 goenv=$(get_go_vars)
 113
 114 case $goenv in
 115         linux-*)
 116                 archive="tar.gz"
 117                 ;;
 118         darwin-*)
 119                 archive="tar.gz"
 120                 ;;
 121         windows-*)
 122                 archive="zip"
 123                 ;;
 124         freebsd-*)
 125                 archive="tar.gz"
 126                 ;;
 127         *)
 128                 echo "unrecognized system environment: $goenv" >&2
 129                 die "currently only linux, darwin, windows and freebsd are supported by this script"
 130 esac
 131
 132
 133 mkdir -p bin/tmp
 134
 135 url=$(mkurl "$distname" "$version" "$archive")
 136 tmpfi="bin/tmp/$distname.$archive"
 137
 138 download "$url" "$tmpfi"
 139 if [ $? -ne 0 ]; then
 140         die "failed to download $url to $tmpfi"
 141 fi
 142
 143 unarchive "$archive" "$tmpfi" "$outpath" "$distname"
 144 if [ $? -ne 0 ]; then
 145         die "failed to exract archive $tmpfi"
 146 fi