Struct Snapshot 

pub struct Snapshot {
    pub schema_version: i32,
    pub export_version: String,
    pub exported_at: String,
    pub exported_by: String,
    pub tables: BTreeMap<String, Vec<Value>>,
}

A structured export snapshot of the task-graph database.

This is a flexible format that can load exports created by either the Database::export_tables (strongly-typed) or any JSON conforming to the export spec. The tables field uses generic JSON values to support comparison across schema versions.

Fields

schema_version: i32

Database schema version (from task-graph internals) Uses i32 for compatibility with existing exports.

export_version: String

Export format version (semver)

exported_at: String

ISO 8601 timestamp of export

exported_by: String

Tool name and version that created this export

tables: BTreeMap<String, Vec<Value>>

Table data, keyed by table name. Each table is an array of row objects with column names as keys.

Implementations

impl Snapshot

pub fn new() -> Self

Create a new empty snapshot with current metadata.

pub fn from_json(json: &str) -> Result<Self, Error>

Load a snapshot from JSON data.

pub fn from_file(path: &Path) -> Result<Self>

Load a snapshot from a file (supports both plain JSON and gzip).

pub fn to_json_pretty(&self) -> Result<String, Error>

Serialize to JSON with pretty formatting.

pub fn get_table(&self, name: &str) -> Option<&Vec<Value>>

Get rows for a specific table.

pub fn is_schema_compatible(&self) -> bool

Check if this snapshot’s schema is compatible with the current version.

pub fn table_names(&self) -> Vec<&str>

Get the list of tables present in this snapshot.

Trait Implementations

impl Clone for Snapshot

fn clone(&self) -> Snapshot

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Snapshot

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Snapshot

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Snapshot

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Snapshot

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.