Allow to disable specialized tokenizations (again)

In PR #2773, I added the `chinese`, `hebrew`, `japanese` and `thai`
feature flags to allow melisearch to be built without huge specialed
tokenizations that took up 90% of the melisearch binary size.
Unfortunately, due to some recent changes, this doesn't work anymore.
The problem lies in excessive use of the `default` feature flag, which
infects the dependency graph.

Instead of adding `default-features = false` here and there, it's easier
and more future-proof to not declare `default` in `milli` and
`meilisearch-types`. I've renamed it to `all-tokenizers`, which also
makes it a bit clearer what it's about.

benchmarks/Cargo.toml

@@ -13,7 +13,7 @@ license.workspace = true
 [dependencies]
 anyhow = "1.0.70"
 csv = "1.2.1"
-milli = { path = "../milli", default-features = false }
+milli = { path = "../milli" }
 mimalloc = { version = "0.1.36", default-features = false }
 serde_json = { version = "1.0.95", features = ["preserve_order"] }
 
@@ -31,7 +31,7 @@ flate2 = "1.0.25"
 reqwest = { version = "0.11.16", features = ["blocking", "rustls-tls"], default-features = false }
 
 [features]
-default = ["milli/default"]
+default = ["milli/all-tokenizations"]
 
 [[bench]]
 name = "search_songs"

meilisearch-types/Cargo.toml

@@ -22,7 +22,7 @@ file-store = { path = "../file-store" }
 flate2 = "1.0.25"
 fst = "0.4.7"
 memmap2 = "0.5.10"
-milli = { path = "../milli", default-features = false }
+milli = { path = "../milli" }
 roaring = { version = "0.10.1", features = ["serde"] }
 serde = { version = "1.0.160", features = ["derive"] }
 serde-cs = "0.2.4"
@@ -40,7 +40,7 @@ meili-snap = { path = "../meili-snap" }
 
 [features]
 # all specialized tokenizations
-default = ["milli/default"]
+all-tokenizations = ["milli/all-tokenizations"]
 
 # chinese specialized tokenization
 chinese = ["milli/chinese"]

meilisearch/Cargo.toml

@@ -106,7 +106,7 @@ vergen = { version = "7.5.1", default-features = false, features = ["git"] }
 zip = { version = "0.6.4", optional = true }
 
 [features]
-default = ["analytics", "meilisearch-types/default", "mini-dashboard"]
+default = ["analytics", "meilisearch-types/all-tokenizations", "mini-dashboard"]
 analytics = ["segment"]
 mini-dashboard = ["actix-web-static-files", "static-files", "anyhow", "cargo_toml", "hex", "reqwest", "sha-1", "tempfile", "zip"]
 chinese = ["meilisearch-types/chinese"]

milli/Cargo.toml

@@ -69,7 +69,7 @@ rand = {version = "0.8.5", features = ["small_rng"] }
 fuzzcheck = "0.12.1"
 
 [features]
-default = [ "charabia/default" ]
+all-tokenizations = [ "charabia/default" ]
 
 # Use POSIX semaphores instead of SysV semaphores in LMDB
 # For more information on this feature, see heed's Cargo.toml

milli/src/search/mod.rs

@@ -204,7 +204,7 @@ mod test {
     use super::*;
     use crate::index::tests::TempIndex;
 
-    #[cfg(feature = "default")]
+    #[cfg(feature = "japanese")]
     #[test]
     fn test_kanji_language_detection() {
         let index = TempIndex::new();

milli/src/search/new/tests/mod.rs

@@ -4,7 +4,7 @@ pub mod distinct;
 pub mod exactness;
 pub mod geo_sort;
 pub mod integration;
-#[cfg(feature = "default")]
+#[cfg(feature = "all-tokenizations")]
 pub mod language;
 pub mod ngram_split_words;
 pub mod proximity;

milli/src/update/index_documents/mod.rs

@@ -1581,7 +1581,7 @@ mod tests {
         assert_eq!(count, 4);
     }
 
-    #[cfg(feature = "default")]
+    #[cfg(feature = "chinese")]
     #[test]
     fn test_meilisearch_1714() {
         let index = TempIndex::new();