depot_tools/update_depot_tools

#!/usr/bin/env bash
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# This script will try to sync the bootstrap directories and then defer control.

if [ "$USER" == "root" ];
then
  echo Running depot tools as root is sad.
  exit
fi

# Export for other depot_tools scripts to re-use.
export DEPOT_TOOLS_DIR="${DEPOT_TOOLS_DIR:-$(dirname "$0")}"

# Test if this script is running under a MSYS install. This is likely an error
# if it is, so we warn the user accordingly.
OUTPUT="$(uname | grep 'MSYS')"
MSYS=$?
if [ $MSYS = 0 ]; then
  echo 'WARNING: It looks like you are running these tools from an MSYS shell'
  echo '(as opposed to a MinGW shell). This shell is not supported and may'
  echo 'fail in mysterious ways.'
  echo
  echo 'To run the supported MinGW shell, use `git bash`, or use `bin/bash.exe`'
  echo 'in your MinGW installation, as opposed to `usr/bin/bash.exe`.'
  echo
fi

base_dir="${DEPOT_TOOLS_DIR}"
if [ -e "$base_dir/.disable_auto_update" ]; then
  exit
fi

# Test if this script is running under a MinGW install.  If it is, we will
# hardcode the paths to Git where possible.
OUTPUT="$(uname | grep 'MINGW')"
MINGW=$?

# We want to update the bundled tools even under MinGW.
if [ $MINGW = 0 ]; then
  $COMSPEC //c `cygpath -w "$base_dir/bootstrap/win_tools.bat"`
  case $? in
    123)
      # msys environment was upgraded, need to quit.
      exit 123
      ;;
    0)
      ;;
    *)
      exit $?
  esac
fi

GIT="git"
if [ -e "$base_dir/git.bat" -a $MINGW = 0 ]; then
  GIT="cmd.exe //c \"$base_dir\\git.bat\""
fi

# Test git and git --version.
function test_git {
  local GITV
  GITV="$(eval "$GIT" --version)" || {
    echo "git isn't installed, please install it"
    exit 1
  }

  GITV="${GITV##* }"          # Only examine last word (i.e. version number)
  local GITD=( ${GITV//./ } ) # Split version number into decimals
  if ((GITD[0] < 1 || (GITD[0] == 2 && GITD[1] < 8) )); then
    echo "git version is ${GITV}, please update to a version later than 2.8"
    exit 1
  fi
}

function update_git_repo {
  remote_url=$(eval "$GIT" config --get remote.origin.url)

  local GIT_CMD_TXT STATUS
  GIT_CMD_TXT=$(git fetch -q origin main 2>&1)
  STATUS=$?
  if [[ $STATUS -ne 0 ]]; then
    echo "depot_tools update failed. Couldn't fetch main branch."
    echo "Retry later or reclone depot_tools" >&2
    echo "$GIT_CMD_TXT" >&2
  else
    GIT_CMD_TXT=$(git checkout -q origin/main 2>&1)
    STATUS=$?
    if [[ $STATUS -ne 0 ]]; then
      echo "depot_tools update failed. Conflict in $base_dir" >&2
      echo "$GIT_CMD_TXT" >&2
    fi
  fi
  # Having python3 on depot_tools causes problems if users put depot_tools in
  # PATH before system's python3, so remove it if present.
  # See crbug.com/1017812.
  if [[ -e python3 ]]; then
    rm python3
  fi
  return $STATUS
}

# Update git checkouts.
if [ "X$DEPOT_TOOLS_UPDATE" = "X0" ]; then
  echo "DEPOT_TOOLS_UPDATE environment variable is 0, skipping update. Set DEPOT_TOOLS_UPDATE to 1 to force update." >&2
else
  if [ -e "$base_dir/.git" ]; then
    cd "$base_dir"
    update_git_repo
    UPDATE_RESULT=$?
    cd - > /dev/null
    if [[ $UPDATE_RESULT -ne 0 ]]; then
      exit $UPDATE_RESULT
    fi
  else
    echo "Warning: Your depot_tools directory does not appear to be a git repository, and cannot be updated." 1>&2
    echo "Consider deleting your depot_tools directory and following the instructions at https://www.chromium.org/developers/how-tos/install-depot-tools/ to reinstall it." 1>&2
  fi

  # Sync CIPD-boostrapped packages.
  source "$base_dir/cipd_bin_setup.sh"
  cipd_bin_setup &> /dev/null

  # Don't bootstrap Python 3 on windows, since it is already done by
  # bootstrap/win_tools.bat.
  if [ "X$MINGW" != "X0" -a "X$DEPOT_TOOLS_BOOTSTRAP_PYTHON3" != "X0" ]; then
    source "$base_dir/bootstrap_python3"
    bootstrap_python3
  fi

fi