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cascading-pr/cascading-pr.sh
2023-10-12 22:37:54 +02:00

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#!/bin/bash
# SPDX-License-Identifier: MIT
set -e
SELF=${BASH_SOURCE[0]}
SELF_DIR="$( cd "$( dirname "$SELF" )" && pwd )"
source $SELF_DIR/cascading-pr-lib.sh
trap "rm -fr $TMPDIR" EXIT
function repo_login() {
local repo="$1"
(
export DOT=$TMPDIR/$repo
forgejo-curl.sh logout
forgejo-curl.sh --token "${options[destination_token]}" login "${options[destination_url]}"
)
}
function repo_curl() {
local repo=$1
shift
DOT=$TMPDIR/$repo forgejo-curl.sh "$@"
}
function upsert_branch() {
local repo_api=${options[destination_url]}/api/v1/repos/${options[destination_repo]}
if repo_curl ${options[destination_repo]} api_json $repo_api/branches/${options[destination_head]} >& /dev/null ; then
log_info "branch ${options[destination_head]} already exists"
return
fi
repo_curl ${options[destination_repo]} api_json --data-raw '{"new_branch_name":"'${options[destination_head]}'","old_branch_name":"'${options[destination_base]}'"}' $repo_api/branches
log_info "branch ${options[destination_head]} created"
}
function upsert_pr() {
local repo_api=${options[destination_url]}/api/v1/repos/${options[destination_repo]}
local title="cascading-pr from ${options[origin_url]}/${options[origin_repo]}/pulls/${options[origin_pr]}"
repo_curl ${options[destination_repo]} api --get --data state=open --data type=pulls --data-urlencode q="$title" $repo_api/issues | jq --raw-output .[0] > $TMPDIR/pr.json
url=$(jq --raw-output .url < $TMPDIR/pr.json)
if test "$url" != "null"; then
log_info "PR already exists $url"
return
fi
repo_curl ${options[destination_repo]} api_json --data-raw '{"title":"'"$title"'","base":"'${options[destination_base]}'","head":"'${options[destination_head]}'"}' $repo_api/pulls > $TMPDIR/pr.json
url=$(jq --raw-output .url < $TMPDIR/pr.json)
log_info "PR created $url"
}
function upsert_clone() {
local direction=$1 branch=$2 clone=$3
local fetch=true
if ! test -d $TMPDIR/$direction; then
git clone $clone -b $branch $TMPDIR/$direction
fetch=false
fi
(
cd $TMPDIR/$direction
if $fetch; then
git fetch $direction
fi
git config user.email cascading-pr@example.com
git config user.name cascading-pr
)
}
function push() {
local direction=$1 branch=$2 clone=$3
(
cd $TMPDIR/$direction
if git diff; then
log_info "nothing to push"
else
git add .
git commit -m 'cascading-pr update'
git push --force-push origin $branch
git rev-parse HEAD > ../$direction.sha
log_info "pushed"
fi
)
}
function wait_destination_ci() {
local sha="$1"
local repo_api=${options[destination_url]}/api/v1/repos/${options[destination_repo]}
wait_success $repo_api $sha
}
function update() {
upsert_clone origin ${options[origin_head]} ${options[origin_clone]}
upsert_clone destination ${options[destination_head]} ${options[destination_clone]}
(
cd $TMPDIR/origin
${options[update]} $TMPDIR/destination
)
push destination ${options[destination_clone]}
}
function finalize_options() {
options[origin_scheme]=$(scheme ${options[origin_url]})
options[origin_host_port]=$(host_port ${options[origin_url]})
options[origin_clone]=${options[origin_scheme]}://:${options[origin_token]}@${options[origin_host_port]}/${options[origin_repo]}
options[destination_scheme]=$(scheme ${options[destination_url]})
options[destination_host_port]=$(host_port ${options[destination_url]})
options[destination_clone]=${options[destination_scheme]}://:${options[destination_token]}@${options[destination_host_port]}/${options[destination_repo]}
options[destination_base]=${options[destination_branch]}
: ${options[prefix]:=${options[origin_repo]}}
options[destination_head]=${options[prefix]}-${options[origin_pr]}
}
function run() {
repo_login ${options[destination_repo]}
upsert_branch
upsert_pr
repo_login ${options[origin_repo]}
update
wait_destination_ci $(cat $TMPDIR/destination.sha)
}
function main() {
while true; do
case "$1" in
--verbose)
shift
verbose
;;
--debug)
shift
debug
;;
--origin-url)
shift
options[origin_url]=$1
shift
;;
--origin-repo)
shift
options[origin_repo]=$1
shift
;;
--origin-token)
shift
options[origin_token]=$1
shift
;;
--origin-pr)
shift
options[origin_pr]=$1
shift
;;
--destination-url)
shift
options[destination_url]=$1
shift
;;
--destination-repo)
shift
options[destination_repo]=$1
shift
;;
--destination-token)
shift
options[destination_token]=$1
shift
;;
--destination-branch)
shift
options[destination_branch]=$1
shift
;;
--update)
shift
options[update]=$1
shift
;;
--prefix)
shift
options[prefix]=$1
shift
;;
*)
finalize_options
"${1:-run}"
return 0
;;
esac
done
}
if echo "${@}" | grep --quiet -e '--debug' ; then
main "${@}"
else
stash_debug "${@}"
fi