fix: unlink mdbook internal toml dependency from mdbook-admonish

Cargo.toml

@@ -22,22 +22,25 @@ name = "mdbook_admonish"
 path = "src/lib.rs"
 
 [dependencies]
-anyhow = "1.0.65"
+anyhow = "1.0.72"
 clap = { version = "4", default_features = false, features = ["std", "derive"], optional = true }
 env_logger = { version = "0.10", default_features = false, optional = true }
-log = "0.4.17"
-mdbook = "0.4.32"
-once_cell = "1.15.0"
-pulldown-cmark = "0.9.2"
-regex = "1.6.0"
-semver = "1.0.14"
-serde = { version = "1.0.145", features = ["derive"] }
-serde_json = "1.0.85"
-toml = "0.7.3"
-toml_edit = { version = "0.19.8", optional = true }
+log = "0.4.19"
+mdbook = "0.4.34"
+once_cell = "1.18.0"
+pulldown-cmark = "0.9.3"
+regex = "1.9.3"
+semver = "1.0.18"
+serde = { version = "1.0.183", features = ["derive"] }
+serde_json = "1.0.104"
+# The version of toml that mdbook uses internally (and uses in it's public api)
+# Only used for compatilibilty with the mdbook public api
+toml_mdbook = { package = "toml", version = "0.5.11" }
+toml = "0.7.6"
+toml_edit = { version = "0.19.14", optional = true }
 
 [dev-dependencies]
-pretty_assertions = "1.3.0"
+pretty_assertions = "1.4.0"
 
 [features]
 default = ["cli", "cli-install"]

src/book_config.rs

@@ -5,15 +5,17 @@ use std::collections::HashMap;
 
 use crate::types::AdmonitionDefaults;
 
+/// Loads the plugin configuration from mdbook internals.
+///
+/// Roundtrips config to string, to avoid linking the plugin's internal version of toml
+/// to the one publically exposed by the mdbook library.
 pub(crate) fn admonish_config_from_context(ctx: &PreprocessorContext) -> Result<Config> {
-    let table: toml::Table = ctx
-        .config
-        .get_preprocessor("admonish")
-        .context("No configuration for mdbook-admonish in book.toml")?
-        .to_owned();
-    table
-        .try_into()
-        .context("Invalid mdbook-admonish configuration in book.toml")
+    let table: String = toml_mdbook::to_string(
+        ctx.config
+            .get_preprocessor("admonish")
+            .context("No configuration for mdbook-admonish in book.toml")?,
+    )?;
+    toml::from_str(&table).context("Invalid mdbook-admonish configuration in book.toml")
 }
 
 #[derive(Debug, Clone, PartialEq, Eq, Deserialize, Serialize)]