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|
//! Generate Markdown and wrap the entire result in an outer Markdown fence.
//!
//! This module is useful when the generated project Markdown needs to be embedded inside another
//! document or a prompt.
use std::{
io::{Read, Write},
path::Path,
};
use crate::{
logger::Logger, md_generator::generate_markdown_from_paths, renderer::RenderOptions,
util::fence::generate_outer_backticks,
};
/// Generates Markdown from a null-separated path list and wraps the full output in a fence.
///
/// The inner Markdown is produced by [`generate_markdown_from_paths`]. The outer fence length is
/// chosen so that any backtick runs inside the generated Markdown cannot close the outer fence.
///
/// `render_options` controls file-size limits and placeholder behavior. `root` controls displayed
/// relative paths, while `origin_base` controls how relative input paths are resolved.
pub fn generate_fenced_markdown<R: Read, W: Write>(
input: R,
mut output: W,
render_options: RenderOptions,
root: &Path,
origin_base: &Path,
project_title: Option<&str>,
logger: Logger,
) -> Result<(), Box<dyn std::error::Error>> {
let mut md_output = Vec::new();
generate_markdown_from_paths(
input,
&mut md_output,
render_options,
root,
origin_base,
project_title,
logger,
)?;
let fence = generate_outer_backticks(&md_output);
writeln!(output, "{}markdown", fence)?;
output.write_all(&md_output)?;
writeln!(output, "{}", fence)?;
Ok(())
}
#[cfg(test)]
mod tests {
use std::fs;
use std::io::{Cursor, Read, Write};
use tempfile::tempdir;
use crate::logger::Logger;
use crate::renderer::RenderOptions;
use super::generate_fenced_markdown;
fn wrap_with_defaults<R: Read, W: Write>(
input: R,
output: W,
root: &std::path::Path,
origin_base: &std::path::Path,
project_title: Option<&str>,
) -> Result<(), Box<dyn std::error::Error>> {
let logger = Logger::default();
let render_options = RenderOptions::default();
generate_fenced_markdown(
input,
output,
render_options,
root,
origin_base,
project_title,
logger,
)
}
#[test]
fn empty_input_produces_wrapped_header() {
let temp_dir = tempdir().unwrap();
let input = Cursor::new(b"");
let mut output = Vec::new();
let root = temp_dir.path();
let origin_base = temp_dir.path();
wrap_with_defaults(input, &mut output, root, origin_base, Some("Project name")).unwrap();
assert_eq!(
String::from_utf8(output).unwrap(),
"```markdown\n# Project name\n```\n"
);
}
#[test]
fn single_file_is_wrapped() {
let temp_dir = tempdir().unwrap();
let origin_base = temp_dir.path();
let input = Cursor::new(b"test_main.rs\0");
let mut output = Vec::new();
let root = temp_dir.path();
fs::write(origin_base.join("test_main.rs"), "fn main() {}").unwrap();
wrap_with_defaults(input, &mut output, root, origin_base, None).unwrap();
let output_str = String::from_utf8(output).unwrap();
// Must contain outer fence
assert!(output_str.starts_with("````markdown\n"));
assert!(output_str.ends_with("\n````\n"));
// Must contain file content
assert!(output_str.contains("## File: test_main.rs"));
assert!(output_str.contains("fn main() {}"));
}
#[test]
fn multiple_files_are_enveloped_using_only_one_outer_fence_while_each_having_its_own_fence() {
let temp_dir = tempdir().unwrap();
let origin_base = temp_dir.path();
let input = Cursor::new(b"a.rs\0b.rs\0");
let mut output = Vec::new();
let root = temp_dir.path();
fs::write(origin_base.join("a.rs"), "A").unwrap();
fs::write(origin_base.join("b.rs"), "B").unwrap();
wrap_with_defaults(input, &mut output, root, origin_base, None).unwrap();
let output_str = String::from_utf8(output).unwrap();
// Each inner file must have its own language‑specific fence
assert!(output_str.contains("```rust\nA\n```"));
assert!(output_str.contains("```rust\nB\n```"));
// Only one outer fence at start and end
assert_eq!(output_str.matches("````markdown").count(), 1);
assert_eq!(output_str.matches("\n````\n").count(), 1);
}
#[test]
fn inner_file_with_four_backticks_causes_outer_fence_of_six_backticks() {
let temp_dir = tempdir().unwrap();
let origin_base = temp_dir.path();
let input = Cursor::new(b"backticks.rs\0");
let mut output = Vec::new();
let root = temp_dir.path();
let content = "````"; // 4 backticks
fs::write(origin_base.join("backticks.rs"), content).unwrap();
wrap_with_defaults(input, &mut output, root, origin_base, None).unwrap();
let output_str = String::from_utf8(output).unwrap();
// Inner fence should be 5 backticks because inner content contains 4 backticks
assert!(output_str.contains("`````rust\n````\n`````"));
// Outer fence must then be 6 backticks
assert!(output_str.starts_with("``````markdown\n"));
assert!(output_str.ends_with("\n``````\n"));
}
#[test]
fn project_title_with_three_backticks_causes_outer_fence_of_four_backticks() {
let temp_dir = tempdir().unwrap();
let input = Cursor::new(b"");
let mut output = Vec::new();
let root = temp_dir.path();
let origin_base = temp_dir.path();
let project_title = "Project ``` name";
wrap_with_defaults(input, &mut output, root, origin_base, Some(project_title)).unwrap();
let output_str = String::from_utf8(output).unwrap();
// Outer fence must be 4 backticks because the header contains 3 backticks
assert!(output_str.starts_with("````markdown\n"));
assert!(output_str.ends_with("\n````\n"));
// The header line itself should appear unchanged
assert!(output_str.contains("# Project ``` name"));
}
}
|
