iankelling.org Git - buildscripts/blob - go

   1 #!/bin/bash
   2 # I, Ian Kelling, follow the GNU license recommendations at
   3 # https://www.gnu.org/licenses/license-recommendations.en.html. They
   4 # recommend that small programs, < 300 lines, be licensed under the
   5 # Apache License 2.0. This file contains or is part of one or more small
   6 # programs. If a small program grows beyond 300 lines, I plan to switch
   7 # its license to GPL.
   8
   9 # Copyright 2024 Ian Kelling
  10
  11 # Licensed under the Apache License, Version 2.0 (the "License");
  12 # you may not use this file except in compliance with the License.
  13 # You may obtain a copy of the License at
  14
  15 #     http://www.apache.org/licenses/LICENSE-2.0
  16
  17 # Unless required by applicable law or agreed to in writing, software
  18 # distributed under the License is distributed on an "AS IS" BASIS,
  19 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  20 # See the License for the specific language governing permissions and
  21 # limitations under the License.
  22
  23
  24 # usage: no args, run to install latest go.
  25
  26 if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi
  27
  28 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
  29 source /usr/local/lib/bash-bear
  30
  31 force=false
  32 case $1 in
  33   -f) force=true ;;
  34 esac
  35
  36 m() { printf "$pre %s\n"  "$*"; "$@"; }
  37 e() { printf "$pre %s\n"  "$*"; }
  38 err() { echo "[$(date +'%Y-%m-%d %H:%M:%S%z')]: $0: $*" >&2; }
  39
  40
  41 if [[ ! -d /a/opt/go.git ]]; then
  42   mkdir -p /a/opt
  43   cd /a/opt
  44   git clone --bare https://go.googlesource.com/go
  45 fi
  46
  47 m cd /a/opt/go.git
  48
  49 up=true
  50 install=false
  51
  52 if ! $force; then
  53   yesterday=$(( $(date +%s) - 60*60*24 ))
  54   fetch_mtime=$(stat -c %Y FETCH_HEAD)
  55   if [[ ! $fetch_mtime ]]; then
  56     err failed to get output from stat -c %Y FETCH_HEAD
  57     exit 1
  58   fi
  59   # no need to check for updates on go more than once a day
  60   if (( fetch_mtime > yesterday )); then
  61     up=false
  62   fi
  63
  64   # update will get overwritten if we dont do it on central host.
  65   if [[ -e /a/bin/bash_unpublished/source-state ]]; then
  66     source /a/bin/bash_unpublished/source-state
  67     if [[ $HOSTNAME != "$HOST2" ]]; then
  68       up=false
  69     fi
  70   fi
  71 fi
  72
  73 shopt -s nullglob
  74
  75 f=$(
  76   for f in go*.tar.gz; do
  77     echo $f
  78   done | sort -Vr | head -n1
  79  )
  80 if [[ ! $f ]]; then
  81   up=true
  82 fi
  83
  84 if $up; then
  85   m git fetch --tags
  86   mkdir -p ~/.local
  87   touch ~/.local/gofetch
  88
  89   vers=($(git tag | sort -Vr | grep -E '^go[0-9.]+$' | head))
  90
  91   ver=${vers[0]}
  92   dl() {
  93     arch=$(dpkg --print-architecture)
  94     f=${ver}.linux-${arch}.tar.gz
  95     if [[ -e $f ]]; then
  96       timestamp=$(stat -c %Y $f)
  97     else
  98       timestamp=0
  99     fi
 100     m wget -nv -N https://dl.google.com/go/$f || ret=$?
 101   }
 102   dl
 103   # 8 is return code for 404. for a new release, they might not have a binary out yet
 104   if [[ $ret == 8 ]]; then
 105     ver=${vers[1]}
 106     dl
 107   fi
 108
 109   new_timestamp=$(stat -c %Y $f)
 110   if [[ $timestamp != $new_timestamp ]]; then
 111     install=true
 112   fi
 113 fi
 114
 115 if $install || [[  ! -e /usr/local/go/bin/go ]]; then
 116   m sudo rm -rf /usr/local/go
 117   m sudo tar -C /usr/local -xzf $f
 118 fi
 119
 120 for x in go*.tar.gz; do
 121   if [[ $x == $f ]]; then continue; fi
 122   rm -fv $x
 123 done