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use std::collections::HashMap;
use std::env;
use std::fs::File;
use std::io::{self, Error as IoError, Read, Write};
use std::mem;
use std::path::{Path, PathBuf};
use pulldown_cmark::{CodeBlockKind, Event, HeadingLevel, Parser, Tag};
pub mod rt;
#[cfg(test)]
mod tests;
pub fn markdown_files_of_directory(dir: &str) -> Vec<PathBuf> {
use glob::{glob_with, MatchOptions};
let opts = MatchOptions {
case_sensitive: false,
require_literal_separator: false,
require_literal_leading_dot: false,
};
let mut out = Vec::new();
for path in glob_with(&format!("{}/**/*.md", dir), opts)
.expect("Failed to read glob pattern")
.filter_map(Result::ok)
{
out.push(path.to_str().unwrap().into());
}
out
}
pub fn generate_doc_tests<T: Clone>(docs: &[T])
where
T: AsRef<Path>,
{
if docs.is_empty() {
return;
}
let docs = docs
.iter()
.cloned()
.map(|path| path.as_ref().to_str().unwrap().to_owned())
.filter(|d| !d.ends_with(".skt.md"))
.collect::<Vec<_>>();
for doc in &docs {
println!("cargo:rerun-if-changed={}", doc);
let skt = format!("{}.skt.md", doc);
if Path::new(&skt).exists() {
println!("cargo:rerun-if-changed={}", skt);
}
}
let out_dir = env::var("OUT_DIR").unwrap();
let cargo_manifest_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
let mut out_file = PathBuf::from(out_dir.clone());
out_file.push("skeptic-tests.rs");
let config = Config {
out_dir: PathBuf::from(out_dir),
root_dir: PathBuf::from(cargo_manifest_dir),
out_file,
target_triple: env::var("TARGET").expect("could not get target triple"),
docs,
};
run(&config);
}
struct Config {
out_dir: PathBuf,
root_dir: PathBuf,
out_file: PathBuf,
target_triple: String,
docs: Vec<String>,
}
fn run(config: &Config) {
let tests = extract_tests(config).unwrap();
emit_tests(config, tests).unwrap();
}
struct Test {
name: String,
text: Vec<String>,
ignore: bool,
no_run: bool,
should_panic: bool,
template: Option<String>,
}
struct DocTestSuite {
doc_tests: Vec<DocTest>,
}
struct DocTest {
path: PathBuf,
old_template: Option<String>,
tests: Vec<Test>,
templates: HashMap<String, String>,
}
fn extract_tests(config: &Config) -> Result<DocTestSuite, IoError> {
let mut doc_tests = Vec::new();
for doc in &config.docs {
let path = &mut config.root_dir.clone();
path.push(doc);
let new_tests = extract_tests_from_file(path)?;
doc_tests.push(new_tests);
}
Ok(DocTestSuite { doc_tests })
}
enum Buffer {
None,
Code(Vec<String>),
Heading(String),
}
fn extract_tests_from_file(path: &Path) -> Result<DocTest, IoError> {
let mut file = File::open(path)?;
let s = &mut String::new();
file.read_to_string(s)?;
let file_stem = &sanitize_test_name(path.file_stem().unwrap().to_str().unwrap());
let tests = extract_tests_from_string(s, file_stem);
let templates = load_templates(path)?;
Ok(DocTest {
path: path.to_owned(),
old_template: tests.1,
tests: tests.0,
templates,
})
}
fn extract_tests_from_string(s: &str, file_stem: &str) -> (Vec<Test>, Option<String>) {
let mut tests = Vec::new();
let mut buffer = Buffer::None;
let parser = Parser::new(s);
let mut section = None;
let mut code_block_start = 0;
let mut old_template = None;
for (event, range) in parser.into_offset_iter() {
let line_number = bytecount::count(&s.as_bytes()[0..range.start], b'\n');
match event {
Event::Start(Tag::Heading(level, ..)) if level < HeadingLevel::H3 => {
buffer = Buffer::Heading(String::new());
}
Event::End(Tag::Heading(level, ..)) if level < HeadingLevel::H3 => {
let cur_buffer = mem::replace(&mut buffer, Buffer::None);
if let Buffer::Heading(sect) = cur_buffer {
section = Some(sanitize_test_name(§));
}
}
Event::Start(Tag::CodeBlock(CodeBlockKind::Fenced(ref info))) => {
let code_block_info = parse_code_block_info(info);
if code_block_info.is_rust {
buffer = Buffer::Code(Vec::new());
}
}
Event::Text(text) => {
if let Buffer::Code(ref mut buf) = buffer {
if buf.is_empty() {
code_block_start = line_number;
}
buf.extend(text.lines().map(|s| format!("{}\n", s)));
} else if let Buffer::Heading(ref mut buf) = buffer {
buf.push_str(&*text);
}
}
Event::End(Tag::CodeBlock(CodeBlockKind::Fenced(ref info))) => {
let code_block_info = parse_code_block_info(info);
if let Buffer::Code(buf) = mem::replace(&mut buffer, Buffer::None) {
if code_block_info.is_old_template {
old_template = Some(buf.into_iter().collect())
} else {
let name = if let Some(ref section) = section {
format!("{}_sect_{}_line_{}", file_stem, section, code_block_start)
} else {
format!("{}_line_{}", file_stem, code_block_start)
};
tests.push(Test {
name,
text: buf,
ignore: code_block_info.ignore,
no_run: code_block_info.no_run,
should_panic: code_block_info.should_panic,
template: code_block_info.template,
});
}
}
}
_ => (),
}
}
(tests, old_template)
}
fn load_templates(path: &Path) -> Result<HashMap<String, String>, IoError> {
let file_name = format!(
"{}.skt.md",
path.file_name().expect("no file name").to_string_lossy()
);
let path = path.with_file_name(&file_name);
if !path.exists() {
return Ok(HashMap::new());
}
let mut map = HashMap::new();
let mut file = File::open(path)?;
let s = &mut String::new();
file.read_to_string(s)?;
let parser = Parser::new(s);
let mut code_buffer = None;
for event in parser {
match event {
Event::Start(Tag::CodeBlock(CodeBlockKind::Fenced(ref info))) => {
let code_block_info = parse_code_block_info(info);
if code_block_info.is_rust {
code_buffer = Some(Vec::new());
}
}
Event::Text(text) => {
if let Some(ref mut buf) = code_buffer {
buf.push(text.to_string());
}
}
Event::End(Tag::CodeBlock(CodeBlockKind::Fenced(ref info))) => {
let code_block_info = parse_code_block_info(info);
if let Some(buf) = code_buffer.take() {
if let Some(t) = code_block_info.template {
map.insert(t, buf.into_iter().collect());
}
}
}
_ => (),
}
}
Ok(map)
}
fn sanitize_test_name(s: &str) -> String {
s.to_ascii_lowercase()
.chars()
.map(|ch| {
if ch.is_ascii() && ch.is_alphanumeric() {
ch
} else {
'_'
}
})
.collect::<String>()
.split('_')
.filter(|s| !s.is_empty())
.collect::<Vec<_>>()
.join("_")
}
fn parse_code_block_info(info: &str) -> CodeBlockInfo {
let tokens = info.split(|c: char| !(c == '_' || c == '-' || c.is_alphanumeric()));
let mut seen_rust_tags = false;
let mut seen_other_tags = false;
let mut info = CodeBlockInfo {
is_rust: false,
should_panic: false,
ignore: false,
no_run: false,
is_old_template: false,
template: None,
};
for token in tokens {
match token {
"" => {}
"rust" => {
info.is_rust = true;
seen_rust_tags = true
}
"should_panic" => {
info.should_panic = true;
seen_rust_tags = true
}
"ignore" => {
info.ignore = true;
seen_rust_tags = true
}
"no_run" => {
info.no_run = true;
seen_rust_tags = true;
}
"skeptic-template" => {
info.is_old_template = true;
seen_rust_tags = true
}
_ if token.starts_with("skt-") => {
info.template = Some(token[4..].to_string());
seen_rust_tags = true;
}
_ => seen_other_tags = true,
}
}
info.is_rust &= !seen_other_tags || seen_rust_tags;
info
}
struct CodeBlockInfo {
is_rust: bool,
should_panic: bool,
ignore: bool,
no_run: bool,
is_old_template: bool,
template: Option<String>,
}
fn emit_tests(config: &Config, suite: DocTestSuite) -> Result<(), IoError> {
let mut out = String::new();
out.push_str("extern crate skeptic;\n");
for doc_test in suite.doc_tests {
for test in &doc_test.tests {
let test_string = {
if let Some(ref t) = test.template {
let template = doc_test.templates.get(t).unwrap_or_else(|| {
panic!("template {} not found for {}", t, doc_test.path.display())
});
create_test_runner(config, &Some(template.to_string()), test)?
} else {
create_test_runner(config, &doc_test.old_template, test)?
}
};
out.push_str(&test_string);
}
}
write_if_contents_changed(&config.out_file, &out)
}
#[allow(clippy::manual_strip)]
fn clean_omitted_line(line: &str) -> &str {
let trimmed = if let Some(pos) = line.find(|c: char| !c.is_whitespace()) {
&line[pos..]
} else {
line
};
if trimmed.starts_with("# ") {
&trimmed[2..]
} else if line.trim() == "#" {
&trimmed[1..]
} else {
line
}
}
fn create_test_input(lines: &[String]) -> String {
lines
.iter()
.map(|s| clean_omitted_line(s).to_owned())
.collect()
}
fn create_test_runner(
config: &Config,
template: &Option<String>,
test: &Test,
) -> Result<String, IoError> {
let template = template.clone().unwrap_or_else(|| String::from("{}"));
let test_text = create_test_input(&test.text);
let mut s: Vec<u8> = Vec::new();
if test.ignore {
writeln!(s, "#[ignore]")?;
}
if test.should_panic {
writeln!(s, "#[should_panic]")?;
}
writeln!(s, "#[test] fn {}() {{", test.name)?;
writeln!(
s,
" let s = &format!(r####\"\n{}\"####, r####\"{}\"####);",
template, test_text
)?;
if test.no_run {
writeln!(
s,
" skeptic::rt::compile_test(r#\"{}\"#, r#\"{}\"#, r#\"{}\"#, s);",
config.root_dir.to_str().unwrap(),
config.out_dir.to_str().unwrap(),
config.target_triple
)?;
} else {
writeln!(
s,
" skeptic::rt::run_test(r#\"{}\"#, r#\"{}\"#, r#\"{}\"#, s);",
config.root_dir.to_str().unwrap(),
config.out_dir.to_str().unwrap(),
config.target_triple
)?;
}
writeln!(s, "}}")?;
writeln!(s)?;
Ok(String::from_utf8(s).unwrap())
}
fn write_if_contents_changed(name: &Path, contents: &str) -> Result<(), IoError> {
match File::open(name) {
Ok(mut file) => {
let mut current_contents = String::new();
file.read_to_string(&mut current_contents)?;
if current_contents == contents {
return Ok(());
}
}
Err(ref err) if err.kind() == io::ErrorKind::NotFound => (),
Err(err) => return Err(err),
}
let mut file = File::create(name)?;
file.write_all(contents.as_bytes())?;
Ok(())
}