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use std::io::Write;
use anyhow::Result;
use base_db::Workspace;
use itertools::Itertools;
use rustc_hash::FxHashMap;
pub fn show_dependency_graph(workspace: &Workspace) -> Result<String> {
let mut documents = FxHashMap::default();
let mut writer = Vec::new();
writeln!(&mut writer, "digraph G {{")?;
writeln!(&mut writer, "rankdir = LR;")?;
for (i, document) in workspace.iter().enumerate() {
let node = format!("v{i:0>5}");
let label = document.uri.as_str();
let shape = if document
.data
.as_tex()
.map_or(false, |data| data.semantics.can_be_root)
{
"tripleoctagon"
} else if document
.data
.as_tex()
.map_or(false, |data| data.semantics.can_be_compiled)
{
"doubleoctagon"
} else {
"octagon"
};
writeln!(&mut writer, "\t{node} [label=\"{label}\", shape={shape}];")?;
documents.insert(&document.uri, node);
}
for edge in workspace
.graphs()
.values()
.flat_map(|graph| &graph.edges)
.unique()
{
let source = &documents[&edge.source];
let target = &documents[&edge.target];
let label = match &edge.data {
base_db::deps::EdgeData::DirectLink(data) => &data.link.path.text,
base_db::deps::EdgeData::AdditionalFiles => "<project>",
base_db::deps::EdgeData::Artifact => "<artifact>",
base_db::deps::EdgeData::FileList(_) => "<fls>",
};
writeln!(&mut writer, "\t{source} -> {target} [label=\"{label}\"];")?;
}
writeln!(&mut writer, "}}")?;
Ok(String::from_utf8(writer)?)
}
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