initial commit with PoC

1 files changed, 59 insertions, 0 deletions

diff --git a/src/config.rs b/src/config.rs
new file mode 100644
index 0000000..53922b0
--- /dev/null
+++ b/src/config.rs
@@ -0,0 +1,59 @@
+use log::debug;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Deserialize, Serialize)]
+pub struct Config {
+    #[serde(default)]
+    pub book: BookConfig,
+    #[serde(default)]
+    pub build: BuildConfig,
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize)]
+pub struct BookConfig {
+    #[serde(default = "default_summary")]
+    pub summary: String,
+}
+
+impl Default for BookConfig {
+    fn default() -> Self {
+        Self {
+            summary: default_summary(),
+        }
+    }
+}
+
+fn default_summary() -> String {
+    "src/_summary.md".to_string()
+}
+
+#[derive(Debug, Clone, Deserialize, Serialize)]
+pub struct BuildConfig {
+    #[serde(default = "default_build_dir")]
+    pub build_dir: String,
+}
+
+impl Default for BuildConfig {
+    fn default() -> Self {
+        Self {
+            build_dir: default_build_dir(),
+        }
+    }
+}
+
+fn default_build_dir() -> String {
+    "pdbook".to_string()
+}
+
+impl Config {
+    pub fn new(config_file: &str) -> Result<Self, config::ConfigError> {
+        let mut s = config::Config::default();
+
+        debug!("Parsing config file: {}", config_file);
+        s.merge(config::File::with_name(config_file))?;
+        debug!("Parsing config from environment");
+        s.merge(config::Environment::with_prefix("PANDOC_DOCBOOK").separator("_"))?;
+
+        s.try_into()
+    }
+}