stdlib/glob: first import

Signed-off-by: Sebastien Binet <binet@cern.ch>
go-python · sbinet · May 24, 2022 · May 24, 2022 · May 6, 2022 · May 6, 2022
commit 6c9f9e58775387175c21017d3285a37d48317053
diff --git a/stdlib/glob/glob.go b/stdlib/glob/glob.go
@@ -0,0 +1,64 @@
+// Copyright 2022 The go-python Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package glob provides the implementation of the python's 'glob' module.
+package glob
+
+import (
+	"path/filepath"
+
+	"github.com/go-python/gpython/py"
+)
+
+func init() {
+	py.RegisterModule(&py.ModuleImpl{
+		Info: py.ModuleInfo{
+			Name: "glob",
+			Doc:  "Filename globbing utility.",
+		},
+		Methods: []*py.Method{
+			py.MustNewMethod("glob", glob, 0, glob_doc),
+		},
+	})
+}
+
+const glob_doc = `Return a list of paths matching a pathname pattern.
+The pattern may contain simple shell-style wildcards a la
+fnmatch. However, unlike fnmatch, filenames starting with a
+dot are special cases that are not matched by '*' and '?'
+patterns.`
+
+func glob(self py.Object, args py.Tuple) (py.Object, error) {
+	var (
+		pypathname py.Object
+	)
+	err := py.ParseTuple(args, "s*:glob", &pypathname)
+	if err != nil {
+		return nil, err
+	}
+
+	var (
+		pathname string
+		cnv      func(v string) py.Object
+	)
+	switch n := pypathname.(type) {
+	case py.String:
+		pathname = string(n)
+		cnv = func(v string) py.Object { return py.String(v) }
+	case py.Bytes:
+		pathname = string(n)
+		cnv = func(v string) py.Object { return py.Bytes(v) }
+	}
+	matches, err := filepath.Glob(pathname)
+	if err != nil {
+		return nil, err
+	}
+
+	lst := py.List{Items: make([]py.Object, len(matches))}
+	for i, v := range matches {
+		lst.Items[i] = cnv(v)
+	}
+
+	return &lst, nil
+}
diff --git a/stdlib/glob/glob_test.go b/stdlib/glob/glob_test.go
@@ -0,0 +1,15 @@
+// Copyright 2022 The go-python Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package glob_test
+
+import (
+	"testing"
+
+	"github.com/go-python/gpython/pytest"
+)
+
+func TestGlob(t *testing.T) {
+	pytest.RunScript(t, "./testdata/test.py")
+}
diff --git a/stdlib/glob/testdata/test.py b/stdlib/glob/testdata/test.py
@@ -0,0 +1,58 @@
+# Copyright 2022 The go-python Authors.  All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+import glob
+
+def norm(vs):
+    if len(vs) == 0:
+        return vs
+    if type(vs[0]) == type(""):
+        return normStr(vs)
+    return normBytes(vs)
+
+def normStr(vs):
+    from os import sep
+    x = []
+    for v in vs:
+        x.append(v.replace('/', sep))
+    return x
+
+def normBytes(vs):
+    from os import sep
+    x = []
+    for v in vs:
+        x.append(v.replace(b'/', bytes(sep, encoding="utf-8")))
+    return x
+
+def assertEqual(x, y):
+    xx = norm(x)
+    yy = norm(y)
+    assert xx == yy, "got: %s, want: %s" % (repr(x), repr(y))
+
+
+## test strings
+assertEqual(glob.glob('*'), ["glob.go", "glob_test.go", "testdata"])
+assertEqual(glob.glob('*test*'), ["glob_test.go", "testdata"])
+assertEqual(glob.glob('*/test*'), ["testdata/test.py", "testdata/test_golden.txt"])
+assertEqual(glob.glob('*/test*_*'), ["testdata/test_golden.txt"])
+assertEqual(glob.glob('*/t??t*_*'), ["testdata/test_golden.txt"])
+assertEqual(glob.glob('*/t[e]?t*_*'), ["testdata/test_golden.txt"])
+assertEqual(glob.glob('*/t[oe]?t*_*'), ["testdata/test_golden.txt"])
+assertEqual(glob.glob('*/t[o]?t*_*'), [])
+
+## FIXME(sbinet)
+## assertEqual(glob.glob('*/t[!o]?t*_*'), ["testdata/test_golden.txt"])
+
+## test bytes
+assertEqual(glob.glob(b'*'), [b"glob.go", b"glob_test.go", b"testdata"])
+assertEqual(glob.glob(b'*test*'), [b"glob_test.go", b"testdata"])
+assertEqual(glob.glob(b'*/test*'), [b"testdata/test.py", b"testdata/test_golden.txt"])
+assertEqual(glob.glob(b'*/test*_*'), [b"testdata/test_golden.txt"])
+assertEqual(glob.glob(b'*/t??t*_*'), [b"testdata/test_golden.txt"])
+assertEqual(glob.glob(b'*/t[e]?t*_*'), [b"testdata/test_golden.txt"])
+assertEqual(glob.glob(b'*/t[oe]?t*_*'), [b"testdata/test_golden.txt"])
+assertEqual(glob.glob(b'*/t[o]?t*_*'), [])
+
+## FIXME(sbinet)
+## assertEqual(glob.glob(b'*/t[!o]?t*_*'), [b"testdata/test_golden.txt"])
diff --git a/stdlib/glob/testdata/test_golden.txt b/stdlib/glob/testdata/test_golden.txt
diff --git a/stdlib/stdlib.go b/stdlib/stdlib.go
@@ -20,6 +20,7 @@ import (
 
 	_ "github.com/go-python/gpython/stdlib/binascii"
 	_ "github.com/go-python/gpython/stdlib/builtin"
+	_ "github.com/go-python/gpython/stdlib/glob"
 	_ "github.com/go-python/gpython/stdlib/math"
 	_ "github.com/go-python/gpython/stdlib/os"
 	_ "github.com/go-python/gpython/stdlib/string"