use {super::*, CompileErrorKind::*};
#[derive(Default)]
pub(crate) struct Analyzer<'src> {
assignments: Table<'src, Assignment<'src>>,
aliases: Table<'src, Alias<'src, Name<'src>>>,
sets: Table<'src, Set<'src>>,
}
impl<'src> Analyzer<'src> {
pub(crate) fn analyze(
loaded: &[PathBuf],
paths: &HashMap<PathBuf, PathBuf>,
asts: &HashMap<PathBuf, Ast<'src>>,
root: &Path,
) -> CompileResult<'src, Justfile<'src>> {
Analyzer::default().justfile(loaded, paths, asts, root)
}
fn justfile(
mut self,
loaded: &[PathBuf],
paths: &HashMap<PathBuf, PathBuf>,
asts: &HashMap<PathBuf, Ast<'src>>,
root: &Path,
) -> CompileResult<'src, Justfile<'src>> {
let mut recipes = Vec::new();
let mut stack = Vec::new();
stack.push(asts.get(root).unwrap());
let mut warnings = Vec::new();
let mut modules: BTreeMap<String, (Name, Justfile)> = BTreeMap::new();
let mut definitions: HashMap<&str, (&'static str, Name)> = HashMap::new();
let mut define = |name: Name<'src>,
second_type: &'static str,
duplicates_allowed: bool|
-> CompileResult<'src> {
if let Some((first_type, original)) = definitions.get(name.lexeme()) {
if !(*first_type == second_type && duplicates_allowed) {
let (original, redefinition) = if name.line < original.line {
(name, *original)
} else {
(*original, name)
};
return Err(redefinition.token.error(Redefinition {
first_type,
second_type,
name: name.lexeme(),
first: original.line,
}));
}
}
definitions.insert(name.lexeme(), (second_type, name));
Ok(())
};
while let Some(ast) = stack.pop() {
for item in &ast.items {
match item {
Item::Alias(alias) => {
define(alias.name, "alias", false)?;
Self::analyze_alias(alias)?;
self.aliases.insert(alias.clone());
}
Item::Assignment(assignment) => {
self.analyze_assignment(assignment)?;
self.assignments.insert(assignment.clone());
}
Item::Comment(_) => (),
Item::Import { absolute, .. } => {
if let Some(absolute) = absolute {
stack.push(asts.get(absolute).unwrap());
}
}
Item::Module { absolute, name, .. } => {
if let Some(absolute) = absolute {
define(*name, "module", false)?;
modules.insert(
name.lexeme().into(),
(*name, Self::analyze(loaded, paths, asts, absolute)?),
);
}
}
Item::Recipe(recipe) => {
if recipe.enabled() {
Self::analyze_recipe(recipe)?;
recipes.push(recipe);
}
}
Item::Set(set) => {
self.analyze_set(set)?;
self.sets.insert(set.clone());
}
}
}
warnings.extend(ast.warnings.iter().cloned());
}
let settings = Settings::from_setting_iter(self.sets.into_iter().map(|(_, set)| set.value));
let mut recipe_table: Table<'src, UnresolvedRecipe<'src>> = Table::default();
AssignmentResolver::resolve_assignments(&self.assignments)?;
for recipe in recipes {
define(recipe.name, "recipe", settings.allow_duplicate_recipes)?;
if recipe_table
.get(recipe.name.lexeme())
.map_or(true, |original| recipe.depth <= original.depth)
{
recipe_table.insert(recipe.clone());
}
}
let recipes = RecipeResolver::resolve_recipes(recipe_table, &self.assignments)?;
let mut aliases = Table::new();
while let Some(alias) = self.aliases.pop() {
aliases.insert(Self::resolve_alias(&recipes, alias)?);
}
let root = paths.get(root).unwrap();
Ok(Justfile {
default: recipes
.values()
.filter(|recipe| recipe.name.path == root)
.fold(None, |accumulator, next| match accumulator {
None => Some(Rc::clone(next)),
Some(previous) => Some(if previous.line_number() < next.line_number() {
previous
} else {
Rc::clone(next)
}),
}),
aliases,
assignments: self.assignments,
loaded: loaded.into(),
recipes,
settings,
warnings,
modules: modules
.into_iter()
.map(|(name, (_name, justfile))| (name, justfile))
.collect(),
})
}
fn analyze_recipe(recipe: &UnresolvedRecipe<'src>) -> CompileResult<'src> {
let mut parameters = BTreeSet::new();
let mut passed_default = false;
for parameter in &recipe.parameters {
if parameters.contains(parameter.name.lexeme()) {
return Err(parameter.name.token.error(DuplicateParameter {
recipe: recipe.name.lexeme(),
parameter: parameter.name.lexeme(),
}));
}
parameters.insert(parameter.name.lexeme());
if parameter.default.is_some() {
passed_default = true;
} else if passed_default {
return Err(
parameter
.name
.token
.error(RequiredParameterFollowsDefaultParameter {
parameter: parameter.name.lexeme(),
}),
);
}
}
let mut continued = false;
for line in &recipe.body {
if !recipe.shebang && !continued {
if let Some(Fragment::Text { token }) = line.fragments.first() {
let text = token.lexeme();
if text.starts_with(' ') || text.starts_with('\t') {
return Err(token.error(ExtraLeadingWhitespace));
}
}
}
continued = line.is_continuation();
}
Ok(())
}
fn analyze_assignment(&self, assignment: &Assignment<'src>) -> CompileResult<'src> {
if self.assignments.contains_key(assignment.name.lexeme()) {
return Err(assignment.name.token.error(DuplicateVariable {
variable: assignment.name.lexeme(),
}));
}
Ok(())
}
fn analyze_alias(alias: &Alias<'src, Name<'src>>) -> CompileResult<'src> {
let name = alias.name.lexeme();
for attr in &alias.attributes {
if *attr != Attribute::Private {
return Err(alias.name.token.error(AliasInvalidAttribute {
alias: name,
attr: *attr,
}));
}
}
Ok(())
}
fn analyze_set(&self, set: &Set<'src>) -> CompileResult<'src> {
if let Some(original) = self.sets.get(set.name.lexeme()) {
return Err(set.name.error(DuplicateSet {
setting: original.name.lexeme(),
first: original.name.line,
}));
}
Ok(())
}
fn resolve_alias(
recipes: &Table<'src, Rc<Recipe<'src>>>,
alias: Alias<'src, Name<'src>>,
) -> CompileResult<'src, Alias<'src>> {
if let Some(recipe) = recipes.get(alias.name.lexeme()) {
return Err(alias.name.token.error(AliasShadowsRecipe {
alias: alias.name.lexeme(),
recipe_line: recipe.line_number(),
}));
}
match recipes.get(alias.target.lexeme()) {
Some(target) => Ok(alias.resolve(Rc::clone(target))),
None => Err(alias.name.token.error(UnknownAliasTarget {
alias: alias.name.lexeme(),
target: alias.target.lexeme(),
})),
}
}
}
#[cfg(test)]
mod tests {
use super::*;
analysis_error! {
name: duplicate_alias,
input: "alias foo := bar\nalias foo := baz",
offset: 23,
line: 1,
column: 6,
width: 3,
kind: Redefinition { first_type: "alias", second_type: "alias", name: "foo", first: 0 },
}
analysis_error! {
name: unknown_alias_target,
input: "alias foo := bar\n",
offset: 6,
line: 0,
column: 6,
width: 3,
kind: UnknownAliasTarget {alias: "foo", target: "bar"},
}
analysis_error! {
name: alias_shadows_recipe_before,
input: "bar: \n echo bar\nalias foo := bar\nfoo:\n echo foo",
offset: 34,
line: 3,
column: 0,
width: 3,
kind: Redefinition { first_type: "alias", second_type: "recipe", name: "foo", first: 2 },
}
analysis_error! {
name: alias_shadows_recipe_after,
input: "foo:\n echo foo\nalias foo := bar\nbar:\n echo bar",
offset: 22,
line: 2,
column: 6,
width: 3,
kind: Redefinition { first_type: "alias", second_type: "recipe", name: "foo", first: 0 },
}
analysis_error! {
name: required_after_default,
input: "hello arg='foo' bar:",
offset: 16,
line: 0,
column: 16,
width: 3,
kind: RequiredParameterFollowsDefaultParameter{parameter: "bar"},
}
analysis_error! {
name: duplicate_parameter,
input: "a b b:",
offset: 4,
line: 0,
column: 4,
width: 1,
kind: DuplicateParameter{recipe: "a", parameter: "b"},
}
analysis_error! {
name: duplicate_variadic_parameter,
input: "a b +b:",
offset: 5,
line: 0,
column: 5,
width: 1,
kind: DuplicateParameter{recipe: "a", parameter: "b"},
}
analysis_error! {
name: duplicate_recipe,
input: "a:\nb:\na:",
offset: 6,
line: 2,
column: 0,
width: 1,
kind: Redefinition { first_type: "recipe", second_type: "recipe", name: "a", first: 0 },
}
analysis_error! {
name: duplicate_variable,
input: "a := \"0\"\na := \"0\"",
offset: 9,
line: 1,
column: 0,
width: 1,
kind: DuplicateVariable{variable: "a"},
}
analysis_error! {
name: extra_whitespace,
input: "a:\n blah\n blarg",
offset: 10,
line: 2,
column: 1,
width: 6,
kind: ExtraLeadingWhitespace,
}
}