Rename directory to match crate name.

mdbook-exerciser/src/main.rs

@@ -0,0 +1,70 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use anyhow::Context;
+use log::trace;
+use mdbook::{book::Book, renderer::RenderContext, BookItem};
+use mdbook_exerciser::process;
+use std::{
+    fs::{create_dir, remove_dir_all},
+    io::stdin,
+    path::Path,
+};
+
+fn main() -> anyhow::Result<()> {
+    pretty_env_logger::init();
+
+    let context = RenderContext::from_json(&mut stdin()).context("Parsing stdin")?;
+
+    let config = context
+        .config
+        .get_renderer("exerciser")
+        .context("Missing output.exerciser configuration")?;
+
+    let output_directory = Path::new(
+        config
+            .get("output-directory")
+            .context("Missing output.exerciser.output-directory configuration value")?
+            .as_str()
+            .context("Expected a string for output.exerciser.output-directory")?,
+    );
+
+    let _ = remove_dir_all(output_directory);
+    create_dir(output_directory).with_context(|| {
+        format!("Failed to create output directory {:?}", output_directory)
+    })?;
+
+    process_all(&context.book, output_directory)?;
+
+    Ok(())
+}
+
+fn process_all(book: &Book, output_directory: &Path) -> anyhow::Result<()> {
+    for item in book.iter() {
+        if let BookItem::Chapter(chapter) = item {
+            trace!("Chapter {:?} / {:?}", chapter.path, chapter.source_path);
+            if let Some(chapter_path) = &chapter.path {
+                // Put the exercises in a subdirectory named after the chapter file, without its
+                // parent directories.
+                let chapter_output_directory =
+                    output_directory.join(chapter_path.file_stem().with_context(
+                        || format!("Chapter {:?} has no file stem", chapter_path),
+                    )?);
+                process(&chapter_output_directory, &chapter.content)?;
+            }
+        }
+    }
+
+    Ok(())
+}