add basic config file, use codemap_diagnostic for main errors

1 files changed, 69 insertions, 3 deletions

diff --git a/src/main.rs b/src/main.rs
index e1d4752..503688e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,6 @@
 //mod doxygen;
 mod cli;
+mod config;
 mod entities;
 mod generator;
 mod pandoc;
@@ -8,14 +9,63 @@ mod parsing;
 #[macro_use]
 extern crate log;
 
-use cli::Command;
+use cli::{Command, ConfigCommand};
 use generator::generate;
 use parsing::parse_file;
 
-use anyhow::Result;
+use anyhow::{Context, Result};
+use codemap::CodeMap;
+use codemap_diagnostic::{Diagnostic, Emitter, Level};
 use structopt::StructOpt;
 
-fn main() -> Result<()> {
+fn into_diagnostic(err: &anyhow::Error) -> Diagnostic {
+    if let Some(err) = err.downcast_ref::<config::ConfigLoadError>() {
+        err.into()
+    } else {
+        Diagnostic {
+            level: Level::Error,
+            message: err.to_string(),
+            code: None,
+            spans: vec![],
+        }
+    }
+}
+
+fn main() {
+    let mut codemap = CodeMap::new();
+
+    match start(&mut codemap) {
+        Ok(()) => {}
+        Err(err) => {
+            let mut emitter =
+                Emitter::stderr(codemap_diagnostic::ColorConfig::Auto, Some(&codemap));
+
+            let mut diagnostics = Vec::new();
+            diagnostics.push(into_diagnostic(&err));
+
+            if let Some(mut source) = err.source() {
+                diagnostics.push(Diagnostic {
+                    level: Level::Note,
+                    message: format!("Caused by: {}", source),
+                    code: None,
+                    spans: vec![],
+                });
+                while let Some(source2) = source.source() {
+                    source = source2;
+                    diagnostics.push(Diagnostic {
+                        level: Level::Note,
+                        message: format!("Caused by: {}", source),
+                        code: None,
+                        spans: vec![],
+                    });
+                }
+            }
+            emitter.emit(&diagnostics);
+        }
+    }
+}
+
+fn start(codemap: &mut CodeMap) -> Result<()> {
     let cli = cli::Cli::from_args();
     pretty_env_logger::formatted_builder()
         .filter(
@@ -30,6 +80,9 @@ fn main() -> Result<()> {
         )
         .try_init()?;
 
+    std::env::set_current_dir(&cli.directory)
+        .with_context(|| format!("Cannot change current directory to: {:?}", cli.directory))?;
+
     match cli.command {
         Command::Generate { file } => {
             let extra_args = cli.extra_arg.iter().flatten().map(AsRef::as_ref).collect();
@@ -38,6 +91,19 @@ fn main() -> Result<()> {
             let base_output_dir = std::path::Path::new("doc");
             generate(&base_output_dir, manager)?;
         }
+        Command::Config {
+            command: ConfigCommand::Default,
+        } => {
+            print!("{}", toml::to_string_pretty(&config::Config::default())?);
+        }
+        Command::Config {
+            command: ConfigCommand::Show,
+        } => {
+            print!(
+                "{}",
+                toml::to_string_pretty(&config::load_config(".", codemap)?)?
+            );
+        }
     }
 
     Ok(())