mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-09-20 04:12:13 +02:00
22552ad88e
When talking about the "master" Tor checkout, we now refer to it as "the primary Tor repository". The "master" branch is instead called "main". See: tpo/core/team#2.
374 lines
11 KiB
Bash
Executable File
374 lines
11 KiB
Bash
Executable File
#!/usr/bin/env bash
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SCRIPT_NAME=$(basename "$0")
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function usage()
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{
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echo "$SCRIPT_NAME [-h] [-n] [-t <test-branch-prefix> [-u]]"
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echo
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echo " arguments:"
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echo " -h: show this help text"
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echo " -n: dry run mode"
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echo " (default: run commands)"
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echo " -t: test branch mode: create new branches from the commits checked"
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echo " out in each maint directory. Call these branches prefix_035,"
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echo " prefix_040, ... , prefix_main."
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echo " (default: merge forward maint-*, release-*, and main)"
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echo " -u: in test branch mode, if a prefix_* branch already exists,"
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echo " skip creating that branch. Use after a merge error, to"
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echo " restart the merge forward at the first unmerged branch."
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echo " (default: if a prefix_* branch already exists, fail and exit)"
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echo
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echo " env vars:"
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echo " required:"
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echo " TOR_FULL_GIT_PATH: where the git repository directories reside."
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echo " You must set this env var, we recommend \$HOME/git/"
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echo " (default: fail if this env var is not set;"
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echo " current: $GIT_PATH)"
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echo
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echo " optional:"
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echo " TOR_MASTER: the name of the directory containing the tor.git clone"
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echo " The primary tor git directory is \$GIT_PATH/\$TOR_MASTER"
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echo " (default: tor; current: $TOR_MASTER_NAME)"
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echo " TOR_WKT_NAME: the name of the directory containing the tor"
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echo " worktrees. The tor worktrees are:"
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echo " \$GIT_PATH/\$TOR_WKT_NAME/{maint-*,release-*}"
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echo " (default: tor-wkt; current: $TOR_WKT_NAME)"
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echo " we recommend that you set these env vars in your ~/.profile"
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}
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#################
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# Configuration #
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#################
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# Don't change this configuration - set the env vars in your .profile
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# Where are all those git repositories?
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GIT_PATH=${TOR_FULL_GIT_PATH:-"FULL_PATH_TO_GIT_REPOSITORY_DIRECTORY"}
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# The main branch git repository directory from which all the worktree have
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# been created.
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TOR_MASTER_NAME=${TOR_MASTER_NAME:-"tor"}
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# The worktrees location (directory).
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TOR_WKT_NAME=${TOR_WKT_NAME:-"tor-wkt"}
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##########################
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# Git branches to manage #
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##########################
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# The branches and worktrees need to be modified when there is a new branch,
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# and when an old branch is no longer supported.
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# Configuration of the branches that needs merging. The values are in order:
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# (0) current maint/release branch name
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# (1) previous maint/release name to merge into (0)
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# (only used in merge forward mode)
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# (2) Full path of the git worktree
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# (3) current branch suffix
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# (maint branches only, only used in test branch mode)
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# (4) previous test branch suffix to merge into (3)
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# (maint branches only, only used in test branch mode)
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#
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# Merge forward example:
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# $ cd <PATH/TO/WORKTREE> (2)
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# $ git checkout maint-0.3.5 (0)
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# $ git pull
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# $ git merge maint-0.3.4 (1)
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#
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# Test branch example:
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# $ cd <PATH/TO/WORKTREE> (2)
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# $ git checkout -b ticket99999_035 (3)
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# $ git checkout maint-0.3.5 (0)
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# $ git pull
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# $ git checkout ticket99999_035
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# $ git merge maint-0.3.5
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# $ git merge ticket99999_034 (4)
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#
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# First set of arrays are the maint-* branch and then the release-* branch.
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# New arrays need to be in the WORKTREE= array else they aren't considered.
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#
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# Only used in test branch mode
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# We create a test branch for the earliest maint branch.
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# But it's the earliest maint branch, so we don't merge forward into it.
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# Since we don't merge forward into it, the second and fifth items must be
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# blank ("").
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# origin that will be used to fetch the updates. All the worktrees are created
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# from that repository.
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ORIGIN_PATH="$GIT_PATH/$TOR_MASTER_NAME"
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#######################
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# Argument processing #
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#######################
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# Controlled by the -n option. The dry run option will just output the command
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# that would have been executed for each worktree.
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DRY_RUN=0
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# Controlled by the -t <test-branch-prefix> option. The test branch base
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# name option makes git-merge-forward.sh create new test branches:
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# <tbbn>_035, <tbbn>_040, ... , <tbbn>_main, and merge forward.
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TEST_BRANCH_PREFIX=
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# Controlled by the -u option. The use existing option checks for existing
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# branches with the <test-branch-prefix>, and checks them out, rather than
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# creating a new branch.
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USE_EXISTING=0
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while getopts "hnt:u" opt; do
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case "$opt" in
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h) usage
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exit 0
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;;
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n) DRY_RUN=1
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echo " *** DRY RUN MODE ***"
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;;
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t) TEST_BRANCH_PREFIX="$OPTARG"
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echo " *** CREATING TEST BRANCHES: ${TEST_BRANCH_PREFIX}_nnn ***"
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;;
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u) USE_EXISTING=1
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echo " *** USE EXISTING TEST BRANCHES MODE ***"
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;;
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*)
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echo
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usage
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exit 1
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;;
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esac
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done
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###########################
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# Git worktrees to manage #
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###########################
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set -e
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if [ -z "$TEST_BRANCH_PREFIX" ]; then
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# maint/release merge mode
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eval "$(git-list-tor-branches.sh -m)"
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# Remove first element: we don't merge forward into it.
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WORKTREE=( "${WORKTREE[@]:1}" )
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else
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eval "$(git-list-tor-branches.sh -m -R)"
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fi
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set +e
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COUNT=${#WORKTREE[@]}
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#############
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# Constants #
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#############
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# Control characters
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CNRM=$'\x1b[0;0m' # Clear color
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# Bright color
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BGRN=$'\x1b[1;32m'
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BBLU=$'\x1b[1;34m'
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BRED=$'\x1b[1;31m'
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BYEL=$'\x1b[1;33m'
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IWTH=$'\x1b[3;37m'
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# Strings for the pretty print.
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MARKER="${BBLU}[${BGRN}+${BBLU}]${CNRM}"
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SUCCESS="${BGRN}success${CNRM}"
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FAILED="${BRED}failed${CNRM}"
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####################
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# Helper functions #
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####################
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# Validate the given returned value (error code), print success or failed. The
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# second argument is the error output in case of failure, it is printed out.
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# On failure, this function exits.
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function validate_ret
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{
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if [ "$1" -eq 0 ]; then
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printf "%s\\n" "$SUCCESS"
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else
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printf "%s\\n" "$FAILED"
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printf " %s" "$2"
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exit 1
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fi
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}
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# Switch to the given branch name.
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function switch_branch
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{
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local cmd="git checkout '$1'"
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printf " %s Switching branch to %s..." "$MARKER" "$1"
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if [ $DRY_RUN -eq 0 ]; then
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msg=$( eval "$cmd" 2>&1 )
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validate_ret $? "$msg"
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else
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printf "\\n %s\\n" "${IWTH}$cmd${CNRM}"
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fi
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}
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# Checkout a new branch with the given branch name.
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function new_branch
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{
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local cmd="git checkout -b '$1'"
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printf " %s Creating new branch %s..." "$MARKER" "$1"
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if [ $DRY_RUN -eq 0 ]; then
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msg=$( eval "$cmd" 2>&1 )
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validate_ret $? "$msg"
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else
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printf "\\n %s\\n" "${IWTH}$cmd${CNRM}"
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fi
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}
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# Switch to an existing branch, or checkout a new branch with the given
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# branch name.
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function switch_or_new_branch
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{
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local cmd="git rev-parse --verify '$1'"
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if [ $DRY_RUN -eq 0 ]; then
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# Call switch_branch if there is a branch, or new_branch if there is not
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msg=$( eval "$cmd" 2>&1 )
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RET=$?
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if [ $RET -eq 0 ]; then
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# Branch: (commit id)
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switch_branch "$1"
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elif [ $RET -eq 128 ]; then
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# Not a branch: "fatal: Needed a single revision"
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new_branch "$1"
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else
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# Unexpected return value
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validate_ret $RET "$msg"
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fi
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else
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printf "\\n %s\\n" "${IWTH}$cmd${CNRM}, then depending on the result:"
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switch_branch "$1"
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new_branch "$1"
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fi
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}
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# Pull the given branch name.
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function pull_branch
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{
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local cmd="git pull"
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printf " %s Pulling branch %s..." "$MARKER" "$1"
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if [ $DRY_RUN -eq 0 ]; then
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msg=$( eval "$cmd" 2>&1 )
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validate_ret $? "$msg"
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else
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printf "\\n %s\\n" "${IWTH}$cmd${CNRM}"
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fi
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}
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# Merge the given branch name ($1) into the current branch ($2).
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function merge_branch
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{
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local cmd="git merge --no-edit '$1'"
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printf " %s Merging branch %s into %s..." "$MARKER" "$1" "$2"
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if [ $DRY_RUN -eq 0 ]; then
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msg=$( eval "$cmd" 2>&1 )
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validate_ret $? "$msg"
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else
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printf "\\n %s\\n" "${IWTH}$cmd${CNRM}"
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fi
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}
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# Merge origin/(branch name) into the current branch.
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function merge_branch_origin
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{
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local cmd="git merge --ff-only 'origin/$1'"
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printf " %s Merging branch origin/%s..." "$MARKER" "$1"
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if [ $DRY_RUN -eq 0 ]; then
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msg=$( eval "$cmd" 2>&1 )
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validate_ret $? "$msg"
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else
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printf "\\n %s\\n" "${IWTH}$cmd${CNRM}"
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fi
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}
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# Go into the worktree repository.
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function goto_repo
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{
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if [ ! -d "$1" ]; then
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echo " $1: Not found. Stopping."
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exit 1
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fi
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cd "$1" || exit
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}
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# Fetch the origin. No arguments.
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function fetch_origin
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{
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local cmd="git fetch origin"
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printf " %s Fetching origin..." "$MARKER"
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if [ $DRY_RUN -eq 0 ]; then
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msg=$( eval "$cmd" 2>&1 )
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validate_ret $? "$msg"
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else
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printf "\\n %s\\n" "${IWTH}$cmd${CNRM}"
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fi
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}
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###############
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# Entry point #
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###############
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# First, fetch the origin.
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goto_repo "$ORIGIN_PATH"
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fetch_origin
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# Go over all configured worktree.
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for ((i=0; i<COUNT; i++)); do
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current=${!WORKTREE[$i]:0:1}
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previous=${!WORKTREE[$i]:1:1}
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repo_path=${!WORKTREE[$i]:2:1}
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# default to merge forward mode
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test_current=
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test_previous=
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target_current="$current"
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target_previous="$previous"
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if [ "$TEST_BRANCH_PREFIX" ]; then
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test_current_suffix=${!WORKTREE[$i]:3:1}
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test_current=${TEST_BRANCH_PREFIX}${test_current_suffix}
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# the current test branch, if present, or maint/release branch, if not
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target_current="$test_current"
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test_previous_suffix=${!WORKTREE[$i]:4:1}
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if [ "$test_previous_suffix" ]; then
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test_previous=${TEST_BRANCH_PREFIX}${test_previous_suffix}
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# the previous test branch, if present, or maint/release branch, if not
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target_previous="$test_previous"
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fi
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fi
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printf "%s Handling branch \\n" "$MARKER" "${BYEL}$target_current${CNRM}"
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# Go into the worktree to start merging.
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goto_repo "$repo_path"
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if [ "$test_current" ]; then
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if [ $USE_EXISTING -eq 0 ]; then
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# Create a test branch from the currently checked-out branch/commit
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# Fail if it already exists
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new_branch "$test_current"
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else
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# Switch if it exists, or create if it does not
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switch_or_new_branch "$test_current"
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fi
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fi
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# Checkout the current maint/release branch
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switch_branch "$current"
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# Update the current maint/release branch with an origin merge to get the
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# latest updates
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merge_branch_origin "$current"
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if [ "$test_current" ]; then
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# Checkout the test branch
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switch_branch "$test_current"
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# Merge the updated maint branch into the test branch
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merge_branch "$current" "$test_current"
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fi
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# Merge the previous branch into the target branch
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# Merge Forward Example:
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# merge maint-0.3.5 into maint-0.4.0.
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# Test Branch Example:
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# merge bug99999_035 into bug99999_040.
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# Skip the merge if the previous branch does not exist
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# (there's nothing to merge forward into the oldest test branch)
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if [ "$target_previous" ]; then
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merge_branch "$target_previous" "$target_current"
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fi
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done
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