1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
//! LLM / embedding backend CLI choices (Wave C1).
/// LLM backend for embedding. Accepts `openrouter` (OpenRouter REST) or
/// `none` (skips embedding; useful for tests).
#[derive(Copy, Clone, Debug, PartialEq, Eq, clap::ValueEnum)]
pub enum LlmBackendChoice {
/// Open router variant.
OpenRouter,
/// None variant.
None,
}
/// v1.0.93: embedding backend selector. Separate from `--llm-backend` which
/// controls enrichment (entity extraction, body enrichment).
/// `auto` uses OpenRouter when a client is initialised.
/// `openrouter` requires API key (exit 78 if absent).
#[derive(Copy, Clone, Debug, PartialEq, Eq, clap::ValueEnum)]
pub enum EmbeddingBackendChoice {
/// Auto variant.
Auto,
/// Openrouter variant.
Openrouter,
}
impl EmbeddingBackendChoice {
/// v1.0.93: produces a fallback chain that prepends OpenRouter when
/// the client is initialised.
pub fn to_chain(self, llm_choice: LlmBackendChoice) -> Vec<crate::embedder::LlmBackendKind> {
use crate::embedder::LlmBackendKind;
match self {
EmbeddingBackendChoice::Openrouter => vec![LlmBackendKind::OpenRouter],
EmbeddingBackendChoice::Auto => {
if crate::embedder::is_openrouter_initialized() {
let mut chain = vec![LlmBackendKind::OpenRouter];
chain.extend(llm_choice.to_chain());
chain
} else {
llm_choice.to_chain()
}
}
}
}
}
impl LlmBackendChoice {
/// Converts the CLI choice into an ordered chain of backends that
/// `embedder::embed_with_fallback` iterates. The first element of the
/// chain is the preferred backend; subsequent elements are fallbacks
/// used when the preferred one fails with `LlmBackendError`.
pub fn to_chain(self) -> Vec<crate::embedder::LlmBackendKind> {
use crate::embedder::LlmBackendKind;
match self {
LlmBackendChoice::OpenRouter => {
vec![LlmBackendKind::OpenRouter, LlmBackendKind::None]
}
LlmBackendChoice::None => vec![LlmBackendKind::None],
}
}
}