#!/bin/bash
# stx-remote-fix.sh Update git remotes for OpenDev rename
#
# stx-remote-fix.sh [-n|--dry-run]
#
# Run in the root of a git repo
#
# Search git remotes for updates due to the OpenDev transition:
#
# git.openstack.org         opendev.org
# review.openstack.org      review.opendev.org
# /openstack-dev/           /openstack/
# /openstack-infra/         /openstack/
# git.starlingx.io          opendev.org
# /openstack/stx-           /starlingx/
# github.com/openstack      review.opendev.org/openstack

OLD_GIT_HOST="git.openstack.org"
NEW_GIT_HOST="opendev.org"

OLD_REVIEW_HOST="review.openstack.org"
NEW_REVIEW_HOST="review.opendev.org"

OLD_OPENSTACK_DEV_NAMESPACE="/openstack-dev/"
OLD_OPENSTACK_INFRA_NAMESPACE="/openstack-infra/"
NEW_OPENSTACK_NAMESPACE="/openstack/"

OLD_STX_HOST="git.starlingx.io"
NEW_STX_HOST="opendev.org"

OLD_STX_NAMESPACE="/openstack/stx-"
NEW_STX_NAMESPACE="/starlingx/"

GITHUB_HOST="github.com"
GITHUB_OPENSTACK="github.com/openstack"

DRY_RUN=""
if [[ "$1" == "--dry-run" || "$1" == "-n" ]]; then
    DRY_RUN=echo
fi

# Get remotes
git remote -v | grep "\(fetch\)" | while read name url _; do
    update=""
    # Look for rewrite opportunities

    # GitHub
    if [[ "${url}" =~ "${GITHUB_OPENSTACK}" ]]; then
        # Rewrite these to canonical URLs
        url=${url/$GITHUB_HOST/$NEW_REVIEW_HOST}
        echo "github: $url"
        update=1
    fi

    # review.openstack.org -> review.opendev.org
    if [[ "${url}" =~ "${OLD_REVIEW_HOST}" ]]; then
        # Rewrite these to canonical URLs
        url=${url/$OLD_REVIEW_HOST/$NEW_REVIEW_HOST}
        echo "review.o.o: $url"
        update=1
    fi

    # git.openstack.org -> opendev.org
    if [[ "${url}" =~ "${OLD_GIT_HOST}" ]]; then
        # Rewrite these to canonical URLs
        url=${url/$OLD_GIT_HOST/$NEW_GIT_HOST}
        echo "git.o.o: $url"
        update=1
    fi

    # /openstack-dev/ -> /openstack/
    if [[ "${url}" =~ "${OLD_OPENSTACK_DEV_NAMESPACE}" ]]; then
        # Rewrite these to canonical URLs
        url=${url/$OLD_OPENSTACK_DEV_NAMESPACE/$NEW_OPENSTACK_NAMESPACE}
        echo "openstack-dev: $url"
        update=1
    fi

    # /openstack-infra/ -> /openstack/
    if [[ "${url}" =~ "${OLD_OPENSTACK_INFRA_NAMESPACE}" ]]; then
        # Rewrite these to canonical URLs
        url=${url/$OLD_OPENSTACK_INFRA_NAMESPACE/$NEW_OPENSTACK_NAMESPACE}
        echo "openstack-infra: $url"
        update=1
    fi

    # StarlingX
    if [[ "${url}" =~ "git.starlingx.io/stx-" ]]; then
        # Rewrite new StarlingX repo names
        url="${url/$OLD_STX_HOST/$NEW_STX_HOST}"
        echo "stx.io-: $url"
        update=1
    fi

    # StarlingX
    if [[ "${url}" =~ "$OLD_STX_NAMESPACE" ]]; then
        # Rewrite new StarlingX repo names
        url="${url/$OLD_STX_NAMESPACE/$NEW_STX_NAMESPACE}"
        echo "stx-: $url"
        update=1
    fi

    # General Gerrit
    # Recreate git remotes
    if [[ -n $update ]]; then
        $DRY_RUN git remote set-url $name $url
    fi
done