81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
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// All rights reserved.
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// builtin-import.go
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package expr
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import (
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"io"
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"os"
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"git.portale-stac.it/go-pkg/expr/kern"
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)
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func importFunc(ctx kern.ExprContext, name string, args map[string]any) (result any, err error) {
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return importGeneral(ctx, name, args)
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}
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func importAllFunc(ctx kern.ExprContext, name string, args map[string]any) (result any, err error) {
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CtrlEnable(ctx, kern.ControlExportAll)
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return importGeneral(ctx, name, args)
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}
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func importGeneral(ctx kern.ExprContext, name string, args map[string]any) (result any, err error) {
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dirList := buildSearchDirList(ctx, "sources", ENV_EXPR_SOURCE_PATH)
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if v, exists := args[kern.ParamFilepath]; exists && v != nil {
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argv := v.([]any)
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result, err = doImport(ctx, name, dirList, NewArrayIterator(argv))
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}
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return
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}
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func doImport(ctx kern.ExprContext, name string, dirList []string, it kern.Iterator) (result any, err error) {
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var v any
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var sourceFilepath string
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for v, err = it.Next(); err == nil; v, err = it.Next() {
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if err = checkStringParamExpected(name, v, it.Index()); err != nil {
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break
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}
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if sourceFilepath, err = makeFilepath(v.(string), dirList); err != nil {
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break
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}
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var file *os.File
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if file, err = os.Open(sourceFilepath); err == nil {
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defer file.Close()
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var expr *ast
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scanner := NewScanner(file, DefaultTranslations())
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parser := NewParser()
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if expr, err = parser.parseGeneral(scanner, allowMultiExpr|allowVarRef, SymEos); err == nil {
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result, err = expr.Eval(ctx)
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}
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if err != nil {
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break
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}
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} else {
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break
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}
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}
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if err != nil {
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if err == io.EOF {
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err = nil
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} else {
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result = nil
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}
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}
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return
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}
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func ImportImportFuncs(ctx kern.ExprContext) {
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ctx.RegisterFunc("import", kern.NewGolangFunctor(importFunc), kern.TypeAny, []kern.ExprFuncParam{
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NewFuncParamFlag(kern.ParamFilepath, PfRepeat),
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})
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ctx.RegisterFunc("importAll", kern.NewGolangFunctor(importAllFunc), kern.TypeAny, []kern.ExprFuncParam{
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NewFuncParamFlag(kern.ParamFilepath, PfRepeat),
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})
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}
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func init() {
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RegisterBuiltinModule("import", ImportImportFuncs, "Functions import() and include()")
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}
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