Trait vergen::AddCustomEntries

pub trait AddCustomEntries<K, V>
where
    K: Into<String> + Ord,
    V: Into<String>,
{
    // Required methods
    fn add_calculated_entries(
        &self,
        idempotent: bool,
        cargo_rustc_env_map: &mut BTreeMap<K, V>,
        cargo_rerun_if_changed: &mut Vec<String>,
        cargo_warning: &mut Vec<String>
    ) -> Result<(), Error>;
    fn add_default_entries(
        &self,
        config: &DefaultConfig,
        cargo_rustc_env_map: &mut BTreeMap<K, V>,
        cargo_rerun_if_changed: &mut Vec<String>,
        cargo_warning: &mut Vec<String>
    ) -> Result<(), Error>;
}

This trait should be implemented to allow the vergen emitter to properly emit your custom instructions.

Required Methods

fn add_calculated_entries( &self, idempotent: bool, cargo_rustc_env_map: &mut BTreeMap<K, V>, cargo_rerun_if_changed: &mut Vec<String>, cargo_warning: &mut Vec<String> ) -> Result<(), Error>

Try to add instructions entries to the various given arguments.

• Write to the cargo_rustc_env map to emit ‘cargo:rustc-env=NAME=VALUE’ instructions.
• Write to the cargo_rerun_if_changed vector to emit ‘cargo:rerun-if-changed=VALUE’ instructions.
• Write to the cargo_warning vector to emit ‘cargo:warning=VALUE’ instructions.

Errors

If an error occurs, the vergen emitter will use add_default_entries to generate output. This assumes generating instructions may fail in some manner so a anyhow::Result is returned.

fn add_default_entries( &self, config: &DefaultConfig, cargo_rustc_env_map: &mut BTreeMap<K, V>, cargo_rerun_if_changed: &mut Vec<String>, cargo_warning: &mut Vec<String> ) -> Result<(), Error>

Based on the given configuration, emit either default idempotent output or generate a failue.

• Write to the cargo_rustc_env map to emit ‘cargo:rustc-env=NAME=VALUE’ instructions.
• Write to the cargo_rerun_if_changed vector to emit ‘cargo:rerun-if-changed=VALUE’ instructions.
• Write to the cargo_warning vector to emit ‘cargo:warning=VALUE’ instructions.

Errors

This assumes generating instructions may fail in some manner so a anyhow::Result is returned.

Implementors