#!/bin/sh

{

set -ex

version=$1
repository_owner=fish-shell
remote=origin
if [ -n "$2" ]; then
    set -u
    repository_owner=$2
    remote=$3
    set +u
    [ $# -eq 3 ]
fi

[ -n "$version" ]

for tool in \
    bundle \
    gh \
    ruby \
    timeout \
; do
    if ! command -v "$tool" >/dev/null; then
        echo >&2 "$0: missing command: $1"
        exit 1
    fi
done

repo_root="$(dirname "$0")/.."
fish_site=$repo_root/../fish-site

for path in . "$fish_site"
do
    if ! git -C "$path" diff HEAD --quiet; then
        echo >&2 "$0: index and worktree must be clean"
        exit 1
    fi
done

if git tag | grep -qxF "$version"; then
    echo >&2 "$0: tag $version already exists"
    exit 1
fi

sed -n 1p CHANGELOG.rst | grep -q '^fish .*(released ???)$'
sed -n 2p CHANGELOG.rst | grep -q '^===*$'

changelog_title="fish $version (released $(date +'%B %d, %Y'))"
sed -i \
    -e "1c$changelog_title" \
    -e "2c$(printf %s "$changelog_title" | sed s/./=/g)" \
    CHANGELOG.rst

CommitVersion() {
    sed -i "s/^version = \".*\"/version = \"$1\"/g" Cargo.toml
    cargo fetch --offline
    git add CHANGELOG.rst Cargo.toml Cargo.lock
    git commit -m "$2

Created by ./build_tools/release.sh $version"
}

CommitVersion "$version" "Release $version"

# N.B. this is not GPG-signed.
git tag --annotate --message="Release $version" $version

git push $remote $version

gh() {
    command gh --repo "$repository_owner/fish-shell" "$@"
}

run_id=
while [ -z "$run_id" ] && sleep 5
do
    run_id=$(gh run list \
                --json=databaseId --jq=.[].databaseId \
                --workflow=release.yml --limit=1 \
                --commit="$(git rev-parse "$version^{commit}")")
done

# Update fishshell.com
tag_oid=$(git rev-parse "$version")
tmpdir=$(mktemp -d)
while ! \
    gh release download "$version" --dir="$tmpdir" \
        --pattern="fish-$version.tar.xz"
do
    timeout 30 gh run watch "$run_id" ||:
done
actual_tag_oid=$(git ls-remote "$remote" |
    awk '$2 == "refs/tags/'"$version"'" { print $1 }')
[ "$tag_oid" = "$actual_tag_oid" ]
tar -C "$tmpdir" xf fish-$version.tar.xz
minor_version=${version%.*}
CopyDocs() {
    rm -rf "fish-site/site/docs/$1"
    cp -r "$tmpdir/fish-$version/user_doc/html" "fish-site/site/docs/$1"
    git -C fish-site add "site/docs/$1"
}
CopyDocs "$minor_version"
latest_release=$(
    releases=$(git tag | grep '^[0-9]*\.[0-9]*\.[0-9]*.*' |
        sed $(: "De-prioritize release candidates (1.2.3-rc0)") \
        's/-/~/g' | LC_ALL=C sort --version-sort)
    printf %s\\n "$releases" | tail -1
)
if [ "$version" = "$latest_release" ]; then
    CopyDocs current
fi
rm -rf "$tmpdir"
(
    cd "$fish_site"
    make new-release
    git add -u
    git commit --message="$(printf %s "\
        | Release $version
        |
        | Created by ../fish-shell/build_tools/release.sh
    " | sed 's,^\s*| ,,')"
)

# N.B. --exit-status doesn't fail reliably.
gh run view "$run_id" --verbose --log-failed --exit-status

while {
    ! draft=$(gh release view "$version" --json=isDraft --jq=.isDraft) \
    || [ "$draft" = true ]
}
do
    sleep 20
done

(
    cd "$fish_site"
    git push git@github.com:$repository_owner/fish-site
)

if git merge-base --is-ancestor $remote/master $version
then
    git push $remote $version:master
else
    # Probably on an integration branch.
    # TODO Maybe push when that's safe (or move this to CI).
    :
fi

if [ "$repository_owner" = fish-shell ]; then {
    mail=$(mktemp)
    cat >$mail <<EOF
From: $(git var GIT_AUTHOR_IDENT | sed 's/ [0-9]* +[0-9]*$//')
To: fish-users Mailing List <fish-users@lists.sourceforge.net>
Subject: fish $version released

See https://github.com/fish-shell/fish-shell/releases/tag/$version
EOF
    git send-email --suppress-cc=all $mail
    rm $mail
} fi

changelog=$(cat - CHANGELOG.rst <<EOF
fish ?.?.? (released ???)
=========================

EOF
)
printf %s\\n "$changelog" >CHANGELOG.rst
CommitVersion ${version}-snapshot "start new cycle"

exit

}