tor/scripts/git/git-pull-all.sh

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#!/usr/bin/env bash
SCRIPT_NAME=$(basename "$0")
function usage()
{
echo "$SCRIPT_NAME [-h] [-n]"
echo
echo " arguments:"
echo " -h: show this help text"
echo " -n: dry run mode"
echo " (default: run commands)"
echo
echo " env vars:"
echo " required:"
echo " TOR_FULL_GIT_PATH: where the git repository directories reside."
echo " You must set this env var, we recommend \$HOME/git/"
echo " (default: fail if this env var is not set;"
echo " current: $GIT_PATH)"
echo
echo " optional:"
echo " TOR_MASTER: the name of the directory containing the tor.git clone"
echo " The tor master git directory is \$GIT_PATH/\$TOR_MASTER"
echo " (default: tor; current: $TOR_MASTER_NAME)"
echo " TOR_WKT_NAME: the name of the directory containing the tor"
echo " worktrees. The tor worktrees are:"
echo " \$GIT_PATH/\$TOR_WKT_NAME/{maint-*,release-*}"
echo " (default: tor-wkt; current: $TOR_WKT_NAME)"
echo " we recommend that you set these env vars in your ~/.profile"
}
#################
# Configuration #
#################
# Don't change this configuration - set the env vars in your .profile
# Where are all those git repositories?
GIT_PATH=${TOR_FULL_GIT_PATH:-"FULL_PATH_TO_GIT_REPOSITORY_DIRECTORY"}
# The tor master git repository directory from which all the worktree have
# been created.
TOR_MASTER_NAME=${TOR_MASTER_NAME:-"tor"}
# The worktrees location (directory).
TOR_WKT_NAME=${TOR_WKT_NAME:-"tor-wkt"}
##########################
# Git branches to manage #
##########################
# Configuration of the branches that need pulling. The values are in order:
# (1) Branch name to pull (update).
# (2) Full path of the git worktree.
#
# As an example:
# $ cd <PATH/TO/WORKTREE> (3)
# $ git checkout maint-0.3.5 (1)
# $ git pull
#
# First set of arrays are the maint-* branch and then the release-* branch.
# New arrays need to be in the WORKTREE= array else they aren't considered.
MAINT_035=( "maint-0.3.5" "$GIT_PATH/$TOR_WKT_NAME/maint-0.3.5" )
MAINT_041=( "maint-0.4.1" "$GIT_PATH/$TOR_WKT_NAME/maint-0.4.1" )
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MAINT_042=( "maint-0.4.2" "$GIT_PATH/$TOR_WKT_NAME/maint-0.4.2" )
MAINT_043=( "maint-0.4.3" "$GIT_PATH/$TOR_WKT_NAME/maint-0.4.3" )
MAINT_MASTER=( "master" "$GIT_PATH/$TOR_MASTER_NAME" )
RELEASE_035=( "release-0.3.5" "$GIT_PATH/$TOR_WKT_NAME/release-0.3.5" )
RELEASE_041=( "release-0.4.1" "$GIT_PATH/$TOR_WKT_NAME/release-0.4.1" )
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RELEASE_042=( "release-0.4.2" "$GIT_PATH/$TOR_WKT_NAME/release-0.4.2" )
RELEASE_043=( "release-0.4.3" "$GIT_PATH/$TOR_WKT_NAME/release-0.4.3" )
# The master branch path has to be the main repository thus contains the
# origin that will be used to fetch the updates. All the worktrees are created
# from that repository.
ORIGIN_PATH="$GIT_PATH/$TOR_MASTER_NAME"
# SC2034 -- shellcheck thinks that these are unused. We know better.
ACTUALLY_THESE_ARE_USED=<<EOF
${MAINT_035[0]}
${MAINT_041[0]}
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${MAINT_042[0]}
${MAINT_043[0]}
${MAINT_MASTER[0]}
${RELEASE_035[0]}
${RELEASE_041[0]}
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${RELEASE_042[0]}
${RELEASE_043[0]}
EOF
###########################
# Git worktrees to manage #
###########################
# List of all worktrees to pull. All defined above. Ordering is not important.
WORKTREE=(
MAINT_035[@]
RELEASE_035[@]
MAINT_041[@]
RELEASE_041[@]
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MAINT_042[@]
RELEASE_042[@]
MAINT_043[@]
RELEASE_043[@]
MAINT_MASTER[@]
)
COUNT=${#WORKTREE[@]}
#######################
# Argument processing #
#######################
# Controlled by the -n option. The dry run option will just output the command
# that would have been executed for each worktree.
DRY_RUN=0
while getopts "hn" opt; do
case "$opt" in
h) usage
exit 0
;;
n) DRY_RUN=1
echo " *** DRY DRUN MODE ***"
;;
*)
echo
usage
exit 1
;;
esac
done
#############
# Constants #
#############
# Control characters
CNRM=$'\x1b[0;0m' # Clear color
# Bright color
BGRN=$'\x1b[1;32m'
BBLU=$'\x1b[1;34m'
BRED=$'\x1b[1;31m'
BYEL=$'\x1b[1;33m'
IWTH=$'\x1b[3;37m'
# Strings for the pretty print.
MARKER="${BBLU}[${BGRN}+${BBLU}]${CNRM}"
SUCCESS="${BGRN}ok${CNRM}"
FAILED="${BRED}failed${CNRM}"
####################
# Helper functions #
####################
# Validate the given returned value (error code), print success or failed. The
# second argument is the error output in case of failure, it is printed out.
# On failure, this function exits.
function validate_ret
{
if [ "$1" -eq 0 ]; then
printf "%s\\n" "$SUCCESS"
else
printf "%s\\n" "$FAILED"
printf " %s" "$2"
exit 1
fi
}
# Switch to the given branch name.
function switch_branch
{
local cmd="git checkout $1"
printf " %s Switching branch to %s..." "$MARKER" "$1"
if [ $DRY_RUN -eq 0 ]; then
msg=$( eval "$cmd" 2>&1 )
validate_ret $? "$msg"
else
printf "\\n %s\\n" "${IWTH}$cmd${CNRM}"
fi
}
# Pull the given branch name.
function merge_branch
{
local cmd="git merge --ff-only origin/$1"
printf " %s Merging branch origin/%s..." "$MARKER" "$1"
if [ $DRY_RUN -eq 0 ]; then
msg=$( eval "$cmd" 2>&1 )
validate_ret $? "$msg"
else
printf "\\n %s\\n" "${IWTH}$cmd${CNRM}"
fi
}
# Go into the worktree repository.
function goto_repo
{
if [ ! -d "$1" ]; then
echo " $1: Not found. Stopping."
exit 1
fi
cd "$1" || exit
}
# Fetch the origin. No arguments.
function fetch_origin
{
local cmd="git fetch origin"
printf " %s Fetching origin..." "$MARKER"
if [ $DRY_RUN -eq 0 ]; then
msg=$( eval "$cmd" 2>&1 )
validate_ret $? "$msg"
else
printf "\\n %s\\n" "${IWTH}$cmd${CNRM}"
fi
}
# Fetch tor-github pull requests. No arguments.
function fetch_tor_github
{
local cmd="git fetch tor-github"
printf " %s Fetching tor-github..." "$MARKER"
if [ $DRY_RUN -eq 0 ]; then
msg=$( eval "$cmd" 2>&1 )
validate_ret $? "$msg"
else
printf "\\n %s\\n" "${IWTH}$cmd${CNRM}"
fi
}
###############
# Entry point #
###############
# First, fetch tor-github.
goto_repo "$ORIGIN_PATH"
fetch_tor_github
# Then, fetch the origin.
fetch_origin
# Go over all configured worktree.
for ((i=0; i<COUNT; i++)); do
current=${!WORKTREE[$i]:0:1}
repo_path=${!WORKTREE[$i]:1:1}
printf "%s Handling branch %s\\n" "$MARKER" "${BYEL}$current${CNRM}"
# Go into the worktree to start merging.
goto_repo "$repo_path"
# Checkout the current branch
switch_branch "$current"
# Update the current branch by merging the origin to get the latest.
merge_branch "$current"
done