echo/examples/misc/fs.echo at main · csfh/echo · GitHub

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; Filesystem: paths, whole-file, metadata, streaming, dirs.
; Run: xo run examples/misc/fs.echo

/ std/io
/ std/str
/ std/bytes
/ std/fs

$ root = fs.join("/tmp", "echo_fs_example")
| fs.create_dir_all(root) {
    $ ok {
        io.print("dir ok")
    }
    ! e {
        io.print(e)
    }
}

$ path = fs.join(root, "note.txt")
| fs.create(path) {
    $ f {
        | f.write("hello") {
            $ ok {
                io.print("stream write")
            }
            ! e {
                io.print(e)
            }
        }
        f.close()
    }
    ! e {
        io.print(e)
    }
}

$ copy = fs.join(root, "copy.txt")
| fs.copy(path, copy) {
    $ ok {
        io.print("copied")
    }
    ! e {
        io.print(e)
    }
}

| fs.metadata(path) {
    $ m {
        io.print(str.from_int(m.len))
    }
    ! e {
        io.print(e)
    }
}

| fs.open(path) {
    $ f {
        | f.read(100) {
            $ b {
                io.print(str.from_bytes(b))
            }
            ! e {
                io.print(e)
            }
        }
        f.close()
    }
    ! e {
        io.print(e)
    }
}

| fs.remove(path) {
    $ ok {
        io.print("rm file")
    }
    ! e {
        io.print(e)
    }
}
| fs.remove(copy) {
    $ ok {
        io.print("rm copy")
    }
    ! e {
        io.print(e)
    }
}
| fs.remove_dir(root) {
    $ ok {
        io.print("rm dir")
    }
    ! e {
        io.print(e)
    }
}