Add a builder-pattern proj-path setter, for flavor

I like being able to chain methods instead of using a temporary variable
in between, so I've made one single function like I'm doing the builder
pattern.

But not really because there's nothing to build or finalize and such.

src/config.rs

@@ -36,6 +36,34 @@ struct PartialConfig {
     token: Option<String>,
 }
 
+impl PartialConfig {
+    // One lonely builder-pattern function to set the project path.
+    // This is so I can do continuation style calls instead of a bunch of
+    // successive `let conf = ...` temporaries.
+    fn project_path(self, path: impl ToString) -> Self{
+        PartialConfig {
+            project_path: Some(path.to_string()),
+            ..self
+        }
+    }
+}
+
+impl TryFrom<&Table> for PartialConfig {
+    type Error = crate::config::Error;
+
+    fn try_from(value: &Table) -> Result<Self> {
+        Ok(Self {
+            // can't get table name because that key is gone by this point.
+            project_path: None,
+            gitea_url: get_maybe_property(&value, "gitea_url")?.cloned(),
+            owner: get_maybe_property(&value, "owner")?.cloned(),
+            repo: get_maybe_property(&value, "repo")?.cloned(),
+            token: get_maybe_property(&value, "token")?.cloned(),
+        })
+    }
+
+}
+
 #[derive(Debug, Default)]
 #[cfg_attr(test, derive(PartialEq))]
 struct WholeFile {
@@ -54,15 +82,23 @@ fn lconf(text: &str) -> Result<WholeFile> {
     let cfg_table = toml_val.as_table().ok_or(Error::BadFormat)?;
 
     // Get the global config out of the file
-    if let Some(section_all) = cfg_table.get("all") {
+    let table_all = get_table(cfg_table, "all")?;
-    	if let Some(table_all) = section_all.as_table() {
+    whole.all = PartialConfig::try_from(table_all)?;
-    		whole.all.gitea_url = get_maybe_property(&table_all, "gitea_url")?.cloned();
-    		whole.all.owner = get_maybe_property(&table_all, "owner")?.cloned();
-    		whole.all.repo = get_maybe_property(&table_all, "repo")?.cloned();
-    		whole.all.token = get_maybe_property(&table_all, "token")?.cloned();
-    	}
-    }
 
+    // Loop over the per-project configs, if any.
+    let per_project_keys = cfg_table
+        .keys()
+        .filter(|s| { // Discard the "[all]" table
+            *s != "all"
+        });
+
+    for path in per_project_keys {
+        let tab = get_table(cfg_table, path)?;
+        let part_cfg = PartialConfig::try_from(tab)?
+            .project_path(path.clone());
+        whole.project_overrides.push(part_cfg);
+    }
+    println!(" ->> lconf - keys {:?}", cfg_table.keys().collect::<Vec<&String>>());
     Ok(whole)
 }