update_remotes.sh

#!/usr/bin/env bash

# change_id of the merge commit
MERGE=ooxtuqvy

maybe_create_remote() {
	local remote_name="$1"
	local remote_url="$2"

	if jj git remote list | cut -d ' ' -f 1 | grep -q "$remote_name"; then
		: # remote already exists, do nothing
	else
		echo "-- Adding upstream remote '$remote_url' for remote '$remote_name'"
		jj git remote add "$remote_name" "$remote_url"
	fi

}

filter_remote() {
	local remote_name="$1"
	local remote_branch="$2"
	local filter_file="$3"
	local trailer_id="$4"
	echo "-- Fetching upstream $remote_name"
	jj git fetch --remote "$remote_name" -b "$remote_branch"
	if [ -z "$UPDATE" ]; then
		local commit="$(jj log --no-graph -T "trailers.filter(|t| t.key() == \"$trailer_id\").map(|t| t.value())" -r $MERGE)"
		echo "-- Pinning $remote_name to current commit ($commit)"
		jj bookmark create -r "$commit" "tmp-$remote_name"
	else
	    jj bookmark create -r "main@${remote_name}" "tmp-$remote_name"
	fi
	echo "-- Updating $remote_name subset"
	josh-filter --update refs/heads/${remote_name}-subset dummy-not-filter --file "$filter_file" refs/heads/tmp-${remote_name}
}

echo "-- Current operation ID (if you need to revert): $(jj op log --no-graph -n 1 -T 'id.short()')"

if jj bookmark list -T 'name ++ "\n"' | grep -q workflow; then
    : # local bookmark already exists, do nothing
else
    jj bookmark track workflow@origin
fi

maybe_create_remote dotnet https://github.com/dotnet/runtime.git
filter_remote dotnet main workflow/dotnet-filter Dotnet-Commit
maybe_create_remote msquic https://github.com/microsoft/msquic.git
filter_remote msquic main workflow/msquic-filter MsQuic-Commit



echo "-- Rebasing onto updated upstreams"
abandon_parents=$(jj log --no-graph -T 'change_id ++ " | "' -r "$MERGE- ~ workflow::")
workflow_parent=$(jj log --no-graph -T 'change_id ++ " | "' -r "$MERGE- & workflow::")
jj rebase -s $MERGE -d "$workflow_parent none()" -d dotnet-subset -d msquic-subset

{
	echo "Merge upstream msquic bindings & dotnet subset"
	echo
	echo -n "MsQuic-Commit: "; jj log --no-graph -T 'commit_id ++ "\n"' -r tmp-msquic --no-pager --color=never
	echo -n "Dotnet-Commit: "; jj log --no-graph -T 'commit_id ++ "\n"' -r tmp-dotnet --no-pager --color=never
} | jj desc -r $MERGE --stdin

jj bookmark forget tmp-msquic
jj bookmark forget tmp-dotnet

echo "-- Abandoning old versions of upstreams"
jj abandon -r "..($abandon_parents none()) ~ ..$MERGE"