Package union

▾ Example

Code:

fs0 := httpfs.New(mapfs.New(map[string]string{
    "zzz-last-file.txt":   "It should be visited last.",
    "a-file.txt":          "It has stuff.",
    "another-file.txt":    "Also stuff.",
    "folderA/entry-A.txt": "Alpha.",
    "folderA/entry-B.txt": "Beta.",
}))
fs1 := httpfs.New(mapfs.New(map[string]string{
    "sample-file.txt":                "This file compresses well. Blaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaah!",
    "not-worth-compressing-file.txt": "Its normal contents are here.",
    "folderA/file1.txt":              "Stuff 1.",
    "folderA/file2.txt":              "Stuff 2.",
    "folderB/folderC/file3.txt":      "Stuff C-3.",
}))

fs := union.New(map[string]http.FileSystem{
    "/fs0": fs0,
    "/fs1": fs1,
})

err := vfsutil.Walk(fs, "/", walk)
if err != nil {
    panic(err)
}

Output:

/
/fs0
/fs0/a-file.txt
/fs0/another-file.txt
/fs0/folderA
/fs0/folderA/entry-A.txt
/fs0/folderA/entry-B.txt
/fs0/zzz-last-file.txt
/fs1
/fs1/folderA
/fs1/folderA/file1.txt
/fs1/folderA/file2.txt
/fs1/folderB
/fs1/folderB/folderC
/fs1/folderB/folderC/file3.txt
/fs1/not-worth-compressing-file.txt
/fs1/sample-file.txt

▾ Example (Empty)

Code:

empty := union.New(nil)

err := vfsutil.Walk(empty, "/", walk)
if err != nil {
    panic(err)
}

Output:

/

▾ Example (NotExist)

Code:

empty := union.New(nil)

_, err := empty.Open("/does-not-exist")
fmt.Println("os.IsNotExist:", os.IsNotExist(err))
fmt.Println(err)

Output:

os.IsNotExist: true
open /does-not-exist: file does not exist