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workspace.go
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/
workspace.go
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package workspace
import (
"fmt"
"os"
"path/filepath"
"github.com/pipe01/poodle/internal/lexer"
"github.com/pipe01/poodle/internal/parser"
"github.com/pipe01/poodle/internal/parser/ast"
"golang.org/x/exp/maps"
)
type Workspace struct {
rootPath string
parsedFiles map[string]*ast.File
requestedFiles map[string]struct{}
}
func New(rootPath string) *Workspace {
return &Workspace{
rootPath: rootPath,
parsedFiles: make(map[string]*ast.File),
requestedFiles: make(map[string]struct{}),
}
}
func (w *Workspace) RequestedFiles() []string {
return maps.Keys(w.requestedFiles)
}
func (w *Workspace) Load(relPath string) (*ast.File, error) {
return w.load(relPath, func(fullPath, relPath string) ([]byte, error) {
w.requestedFiles[fullPath] = struct{}{}
return os.ReadFile(fullPath)
}, make(map[string]struct{}))
}
func (w *Workspace) LoadWithContents(relPath string, contents []byte) (*ast.File, error) {
return w.load(relPath, func(fullPath, wantRelPath string) ([]byte, error) {
if wantRelPath == relPath {
return contents, nil
}
return os.ReadFile(fullPath)
}, make(map[string]struct{}))
}
func (w *Workspace) load(relPath string, getContents func(fullPath, relPath string) ([]byte, error), seen map[string]struct{}) (*ast.File, error) {
fullPath := filepath.Join(w.rootPath, relPath)
if _, ok := seen[fullPath]; ok {
return nil, fmt.Errorf("detected include cycle on %q", relPath)
}
seen[fullPath] = struct{}{}
defer delete(seen, fullPath)
if f, ok := w.parsedFiles[fullPath]; ok {
return f, nil
}
contents, err := getContents(fullPath, relPath)
if err != nil {
return nil, fmt.Errorf("get file contents: %w", err)
}
l := lexer.New(contents, relPath)
tks, err := l.Collect()
if err != nil {
return nil, fmt.Errorf("lex file: %w", err)
}
file, err := parser.Parse(tks, func(s string) (*ast.File, error) {
if !filepath.IsAbs(s) {
s = filepath.Join(filepath.Dir(relPath), s)
}
return w.load(s, getContents, seen)
})
if err != nil {
return nil, fmt.Errorf("parse file: %w", err)
}
w.parsedFiles[fullPath] = file
return file, nil
}