introduce a new testtool cli for dvc-data

cli.py

@@ -0,0 +1,214 @@
+#! /usr/bin/env python3
+
+import enum
+import hashlib
+import os
+import posixpath
+import sys
+from pathlib import Path
+from posixpath import relpath
+from typing import Optional
+
+import typer  # pylint: disable=import-error
+from dvc_objects.errors import ObjectFormatError
+from dvc_objects.fs import LocalFileSystem, MemoryFileSystem
+from dvc_objects.fs.callbacks import Callback
+from dvc_objects.fs.utils import human_readable_to_bytes
+
+from dvc_data.hashfile.db import HashFileDB
+from dvc_data.hashfile.hash import file_md5 as _file_md5
+from dvc_data.hashfile.hash import fobj_md5 as _fobj_md5
+from dvc_data.hashfile.hash_info import HashInfo
+from dvc_data.hashfile.state import State
+from dvc_data.objects.tree import Tree
+from dvc_data.stage import stage as _stage
+from dvc_data.transfer import transfer as _transfer
+
+file_type = typer.Argument(
+    ...,
+    exists=True,
+    file_okay=True,
+    dir_okay=False,
+    readable=True,
+    resolve_path=True,
+    allow_dash=True,
+    path_type=str,
+)
+dir_file_type = typer.Argument(
+    ...,
+    exists=True,
+    file_okay=True,
+    dir_okay=True,
+    readable=True,
+    resolve_path=True,
+    allow_dash=True,
+    path_type=str,
+)
+
+HashEnum = enum.Enum(  # type: ignore[misc]
+    "HashEnum", {h: h for h in sorted(hashlib.algorithms_available)}
+)
+SIZE_HELP = "Human readable size, eg: '1kb', '100Mb', '10GB' etc"
+ODB_PATH = typer.Option(
+    ".dvc/cache", help="Path to the root of the odb", envvar="ODB_PATH"
+)
+
+app = typer.Typer(name="dvc-data", help="dvc-data testingtool")
+
+
+@app.command(name="hash", help="Compute checksum of the file")
+def hash_file(
+    file: Path = file_type,
+    name: HashEnum = typer.Option("md5", "-n", "--name"),
+    progress: bool = typer.Option(False, "--progress", "-p"),
+    text: Optional[bool] = typer.Option(None, "--text/--binary", "-t/-b"),
+):
+    path = relpath(file)
+    hash_name = name.value
+    callback = Callback.as_callback()
+    if progress:
+        callback = Callback.as_tqdm_callback(
+            desc=f"hashing {path} with {hash_name}", bytes=True
+        )
+
+    with callback:
+        if path == "-":
+            fobj = callback.wrap_attr(sys.stdin.buffer)
+            hash_value = _fobj_md5(fobj, text=text, name=hash_name)
+        else:
+            hash_value = _file_md5(
+                path, name=hash_name, callback=callback, text=text
+            )
+    typer.echo(f"{hash_name}: {hash_value}")
+
+
+@app.command(help="Generate sparse file")
+def gensparse(
+    file: Path = typer.Argument(..., allow_dash=True),
+    size: str = typer.Argument(..., help=SIZE_HELP),
+):
+    with file.open("wb") as f:
+        f.seek(human_readable_to_bytes(size) - 1)
+        f.write(b"\0")
+
+
+@app.command(help="Generate file with random contents")
+def genrand(
+    file: Path = typer.Argument(..., allow_dash=True),
+    size: str = typer.Argument(..., help=SIZE_HELP),
+):
+    with file.open("wb") as f:
+        f.write(os.urandom(human_readable_to_bytes(size)))
+
+
+def from_shortoid(odb: HashFileDB, oid: str) -> str:
+    oid = oid if oid != "-" else sys.stdin.read().strip()
+    try:
+        return odb.exists_prefix(oid)
+    except KeyError as exc:
+        typer.echo(f"Not a valid {oid=}", err=True)
+        raise typer.Exit(1) from exc
+    except ValueError as exc:
+        typer.echo(f"Ambiguous {oid=}", err=True)
+        raise typer.Exit(1) from exc
+
+
+def get_odb(path):
+    state = State(tmp_dir=os.path.join(path, "tmp"))
+    return HashFileDB(LocalFileSystem(), path, state=state)
+
+
+@app.command(help="Oid to path")
+def o2p(oid: str = typer.Argument(..., allow_dash=True), db: str = ODB_PATH):
+    odb = get_odb(db)
+    path = odb.oid_to_path(from_shortoid(odb, oid))
+    typer.echo(path)
+
+
+@app.command(help="Path to Oid")
+def p2o(path: Path = typer.Argument(..., allow_dash=True), db: str = ODB_PATH):
+    odb = get_odb(db)
+    fs_path = relpath(path)
+    if fs_path == "-":
+        fs_path = sys.stdin.read().strip()
+
+    oid = odb.path_to_oid(fs_path)
+    typer.echo(oid)
+
+
+@app.command(help="Provide content of the objects")
+def cat(
+    oid: str = typer.Argument(..., allow_dash=True),
+    db: str = ODB_PATH,
+    check: bool = typer.Option(False, "--check", "-c"),
+):
+    odb = get_odb(db)
+    oid = from_shortoid(odb, oid)
+    if check:
+        try:
+            return odb.check(oid, check_hash=True)
+        except ObjectFormatError as exc:
+            typer.echo(exc, err=True)
+            raise typer.Exit(1) from exc
+
+    path = odb.oid_to_path(oid)
+    contents = odb.fs.cat_file(path)
+    return typer.echo(contents)
+
+
+@app.command(help="Stage and optionally write object to the database")
+def stage(
+    path: Path = dir_file_type,
+    db: str = ODB_PATH,
+    write: bool = typer.Option(False, "--write", "-w"),
+    shallow: bool = False,
+):
+    odb = get_odb(db)
+    fs_path = relpath(path)
+
+    fs = odb.fs
+    if fs_path == "-":
+        fs = MemoryFileSystem()
+        fs.put_file(sys.stdin.buffer, fs_path)
+
+    staging, _, obj = _stage(odb, fs_path, fs, name="md5")
+    if write:
+        _transfer(
+            staging,
+            odb,
+            {obj.hash_info},
+            hardlink=True,
+            shallow=shallow,
+        )
+    typer.echo(obj)
+
+
+@app.command(help="List object")
+def ls(oid: str = typer.Argument(..., allow_dash=True), db: str = ODB_PATH):
+    odb = get_odb(db)
+    oid = from_shortoid(odb, oid)
+    try:
+        tree = Tree.load(odb, HashInfo("md5", oid))
+    except ObjectFormatError as exc:
+        typer.echo(str(exc), err=True)
+        raise typer.Exit(1) from exc
+
+    for key, (_, hash_info) in tree.iteritems():
+        typer.echo(f"{hash_info.value}\t{posixpath.join(*key)}")
+
+
+@app.command(help="Verify objects in the database")
+def fsck(db: str = ODB_PATH):
+    odb = get_odb(db)
+    ret = 0
+    for oid in odb.all():
+        try:
+            odb.check(oid, check_hash=True)
+        except ObjectFormatError as exc:
+            ret = 1
+            typer.echo(exc)
+    raise typer.Exit(ret)
+
+
+if __name__ == "__main__":
+    app()

setup.cfg

@@ -46,6 +46,7 @@ tests =
     s3fs[boto3]>=2022.02.0; python_version < '3.11'
 dev =
     %(tests)s
+    typer>=0.4,<0.5
 
 [options.packages.find]
 exclude =
@@ -65,3 +66,5 @@ max-complexity = 15
 select = B,C,E,F,W,T4,B902,T,P
 show_source = true
 count = true
+per-file-ignores =
+    cli.py:B008

src/dvc_data/hashfile/hash.py

@@ -70,13 +70,16 @@ def hash_name(self) -> str:
 
 
 def fobj_md5(
-    fobj: BinaryIO, chunk_size: int = 2**20, text: Optional[bool] = None
+    fobj: BinaryIO,
+    chunk_size: int = 2**20,
+    text: Optional[bool] = None,
+    name="md5",
 ) -> str:
     # ideally, we want the heuristics to be applied in a similar way,
     # regardless of the size of the first chunk,
     # for which we may need to buffer till DEFAULT_CHUNK_SIZE.
     assert chunk_size >= DEFAULT_CHUNK_SIZE
-    stream = HashStreamFile(fobj, text=text)
+    stream = HashStreamFile(fobj, hash_name=name, text=text)
     while True:
         data = stream.read(chunk_size)
         if not data:
@@ -89,11 +92,12 @@ def file_md5(
     fs: "FileSystem" = localfs,
     callback: "Callback" = DEFAULT_CALLBACK,
     text: Optional[bool] = None,
+    name: str = "md5",
 ) -> str:
     size = fs.size(fname) or 0
     callback.set_size(size)
     with fs.open(fname, "rb") as fobj:
-        return fobj_md5(callback.wrap_attr(fobj), text=text)
+        return fobj_md5(callback.wrap_attr(fobj), text=text, name=name)
 
 
 def _adapt_info(info: Dict[str, Any], scheme: str) -> Dict[str, Any]: