Migrate from legacy template

get_closest_migration_tag(git, commit)

Find nearest migration tag before given commit.

Source code in nava/platform/projects/migrate_from_legacy_template.py

def get_closest_migration_tag(git: GitProject, commit: str) -> tuple[str, bool]:
    """Find nearest migration tag before given commit."""
    from nava.platform.cli.commands.infra.info_command import get_version

    closest_tag = get_closest_tag_before_commit(git, commit)
    migration_tags = git.get_tags("--list", f"{MIGRATION_TAG_PREFIX}*")
    if not migration_tags:
        raise Exception("Can't find migration tags")

    closest_version = get_version(closest_tag)
    if not closest_version:
        raise Exception(f"Can't determine version from {closest_tag}")

    candidates = []

    for migration_tag in migration_tags:
        migration_version = get_version(
            migration_tag.removeprefix(MIGRATION_TAG_PREFIX).removeprefix("v")
        )

        if not migration_version:
            raise Exception(f"Can't determine migration version from {migration_tag}")

        if closest_version == migration_version:
            return migration_tag, True

        if migration_version < closest_version:
            candidates.append(migration_version)

    if candidates:
        closest_migration_version = sorted(candidates, reverse=True)[0]
        return MIGRATION_TAG_PREFIX + "v" + str(closest_migration_version), False

    raise Exception(f"Can't find matching migration version for {closest_tag}")

get_closest_tag_before_commit(git, commit)

Find nearest tag before given commit.

Source code in nava/platform/projects/migrate_from_legacy_template.py

def get_closest_tag_before_commit(git: GitProject, commit: str) -> str:
    """Find nearest tag before given commit."""
    from nava.platform.cli.commands.infra.info_command import get_version

    closest_tag = git.get_closest_tag(commit)
    if not closest_tag:
        raise Exception(f"Can't find closest tag for {commit}")

    closest_version = get_version(closest_tag)
    if not closest_version:
        raise Exception(f"Can't determine version from tag {closest_tag}")

    return "v" + closest_version.base_version