params/metrics: diff: implement tabulated markdown output (--show-md)

dvc/command/diff.py

@@ -11,6 +11,21 @@
 logger = logging.getLogger(__name__)
 
 
+def _show_md(diff):
+    from dvc.utils.diff import table
+
+    rows = []
+    for status in ["added", "deleted", "modified"]:
+        entries = diff.get(status, [])
+        if not entries:
+            continue
+        paths = sorted([entry["path"] for entry in entries])
+        for path in paths:
+            rows.append([status, path])
+
+    return table(["Status", "Path"], rows, True)
+
+
 class CmdDiff(CmdBase):
     @staticmethod
     def _format(diff):
@@ -103,6 +118,8 @@ def run(self):
 
             if self.args.show_json:
                 logger.info(json.dumps(diff))
+            elif self.args.show_md:
+                logger.info(_show_md(diff))
             elif diff:
                 logger.info(self._format(diff))
 
@@ -147,4 +164,10 @@ def add_parser(subparsers, parent_parser):
         action="store_true",
         default=False,
     )
+    diff_parser.add_argument(
+        "--show-md",
+        help="Show tabulated output in the Markdown format (GFM).",
+        action="store_true",
+        default=False,
+    )
     diff_parser.set_defaults(func=CmdDiff)

dvc/command/metrics.py

@@ -87,7 +87,7 @@ def run(self):
         return 0
 
 
-def _show_diff(diff):
+def _show_diff(diff, markdown=False):
     from collections import OrderedDict
 
     from dvc.utils.diff import table
@@ -105,7 +105,7 @@ def _show_diff(diff):
                 ]
             )
 
-    return table(["Path", "Metric", "Value", "Change"], rows)
+    return table(["Path", "Metric", "Value", "Change"], rows, markdown)
 
 
 class CmdMetricsDiff(CmdBase):
@@ -124,7 +124,7 @@ def run(self):
 
                 logger.info(json.dumps(diff))
             else:
-                table = _show_diff(diff)
+                table = _show_diff(diff, self.args.show_md)
                 if table:
                     logger.info(table)
 
@@ -263,6 +263,12 @@ def add_parser(subparsers, parent_parser):
         default=False,
         help="Show output in JSON format.",
     )
+    metrics_diff_parser.add_argument(
+        "--show-md",
+        action="store_true",
+        default=False,
+        help="Show tabulated output in the Markdown format (GFM).",
+    )
     metrics_diff_parser.set_defaults(func=CmdMetricsDiff)
 
     METRICS_REMOVE_HELP = "Remove metric mark on a DVC-tracked file."

dvc/command/params.py

@@ -8,7 +8,7 @@
 logger = logging.getLogger(__name__)
 
 
-def _show_diff(diff):
+def _show_diff(diff, markdown=False):
     from dvc.utils.diff import table
 
     rows = []
@@ -17,7 +17,7 @@ def _show_diff(diff):
         for param, change in sorted_pdiff.items():
             rows.append([fname, param, change["old"], change["new"]])
 
-    return table(["Path", "Param", "Old", "New"], rows)
+    return table(["Path", "Param", "Old", "New"], rows, markdown)
 
 
 class CmdParamsDiff(CmdBase):
@@ -34,7 +34,7 @@ def run(self):
 
                 logger.info(json.dumps(diff))
             else:
-                table = _show_diff(diff)
+                table = _show_diff(diff, self.args.show_md)
                 if table:
                     logger.info(table)
 
@@ -94,4 +94,10 @@ def add_parser(subparsers, parent_parser):
         default=False,
         help="Show output in JSON format.",
     )
+    params_diff_parser.add_argument(
+        "--show-md",
+        action="store_true",
+        default=False,
+        help="Show tabulated output in the Markdown format (GFM).",
+    )
     params_diff_parser.set_defaults(func=CmdParamsDiff)

dvc/utils/diff.py

@@ -85,24 +85,20 @@ def diff(old, new, with_unchanged=False):
     return dict(res)
 
 
-def table(header, rows):
-    from texttable import Texttable
+def table(header, rows, markdown=False):
+    from tabulate import tabulate
 
-    if not rows:
+    if not rows and not markdown:
         return ""
 
-    t = Texttable()
-
-    # disable automatic formatting
-    t.set_cols_dtype(["t"] * len(header))
-
-    # remove borders to make it easier for users to copy stuff
-    t.set_chars([""] * len(header))
-    t.set_deco(0)
-
-    t.add_rows([header] + rows)
-
-    return t.draw()
+    return tabulate(
+        rows,
+        header,
+        tablefmt="github" if markdown else "plain",
+        disable_numparse=True,
+        # None will be shown as "" by default, overriding
+        missingval="None",
+    )
 
 
 def format_dict(d):

setup.py

@@ -78,7 +78,7 @@ def run(self):
     "pydot>=1.2.4",
     "speedcopy>=2.0.1; python_version < '3.8' and sys_platform == 'win32'",
     "flatten_json>=0.1.6",
-    "texttable>=0.5.2",
+    "tabulate>=0.8.7",
     "pygtrie==2.3.2",
     "dpath>=2.0.1,<3",
 ]

tests/unit/command/test_diff.py

@@ -3,6 +3,7 @@
 import os
 
 from dvc.cli import parse_args
+from dvc.command.diff import _show_md
 
 
 def test_default(mocker, caplog):
@@ -110,3 +111,32 @@ def info():
     cmd = args.func(args)
     assert 0 == cmd.run()
     assert not info()
+
+
+def test_show_md_empty():
+    assert _show_md({}) == ("| Status   | Path   |\n" "|----------|--------|")
+
+
+def test_show_md():
+    diff = {
+        "deleted": [
+            {"path": "zoo", "hash": "22222"},
+            {"path": os.path.join("data", ""), "hash": "XXXXXXXX.dir"},
+            {"path": os.path.join("data", "foo"), "hash": "11111111"},
+            {"path": os.path.join("data", "bar"), "hash": "00000000"},
+        ],
+        "modified": [
+            {"path": "file", "hash": {"old": "AAAAAAAA", "new": "BBBBBBBB"}}
+        ],
+        "added": [{"path": "file", "hash": "00000000"}],
+    }
+    assert _show_md(diff) == (
+        "| Status   | Path     |\n"
+        "|----------|----------|\n"
+        "| added    | file     |\n"
+        "| deleted  | data{sep}    |\n"
+        "| deleted  | data{sep}bar |\n"
+        "| deleted  | data{sep}foo |\n"
+        "| deleted  | zoo      |\n"
+        "| modified | file     |"
+    ).format(sep=os.path.sep)

tests/unit/command/test_metrics.py

@@ -1,3 +1,5 @@
+import textwrap
+
 from dvc.cli import parse_args
 from dvc.command.metrics import CmdMetricsDiff, CmdMetricsShow, _show_diff
 
@@ -37,25 +39,30 @@ def test_metrics_diff(dvc, mocker):
 def test_metrics_show_json_diff():
     assert _show_diff(
         {"metrics.json": {"a.b.c": {"old": 1, "new": 2, "diff": 3}}}
-    ) == (
-        "    Path       Metric   Value   Change\n"
-        "metrics.json   a.b.c    2       3     "
+    ) == textwrap.dedent(
+        """\
+        Path          Metric    Value    Change
+        metrics.json  a.b.c     2        3"""
     )
 
 
 def test_metrics_show_raw_diff():
-    assert _show_diff({"metrics": {"": {"old": "1", "new": "2"}}}) == (
-        " Path     Metric   Value         Change      \n"
-        "metrics            2       diff not supported"
+    assert _show_diff(
+        {"metrics": {"": {"old": "1", "new": "2"}}}
+    ) == textwrap.dedent(
+        """\
+        Path     Metric    Value    Change
+        metrics            2        diff not supported"""
     )
 
 
 def test_metrics_diff_no_diff():
     assert _show_diff(
         {"other.json": {"a.b.d": {"old": "old", "new": "new"}}}
-    ) == (
-        "   Path      Metric   Value         Change      \n"
-        "other.json   a.b.d    new     diff not supported"
+    ) == textwrap.dedent(
+        """\
+        Path        Metric    Value    Change
+        other.json  a.b.d     new      diff not supported"""
     )
 
 
@@ -66,18 +73,20 @@ def test_metrics_diff_no_changes():
 def test_metrics_diff_new_metric():
     assert _show_diff(
         {"other.json": {"a.b.d": {"old": None, "new": "new"}}}
-    ) == (
-        "   Path      Metric   Value         Change      \n"
-        "other.json   a.b.d    new     diff not supported"
+    ) == textwrap.dedent(
+        """\
+        Path        Metric    Value    Change
+        other.json  a.b.d     new      diff not supported"""
     )
 
 
 def test_metrics_diff_deleted_metric():
     assert _show_diff(
         {"other.json": {"a.b.d": {"old": "old", "new": None}}}
-    ) == (
-        "   Path      Metric   Value         Change      \n"
-        "other.json   a.b.d    None    diff not supported"
+    ) == textwrap.dedent(
+        """\
+        Path        Metric    Value    Change
+        other.json  a.b.d     None     diff not supported"""
     )
 
 
@@ -114,9 +123,10 @@ def test_metrics_show(dvc, mocker):
 def test_metrics_diff_prec():
     assert _show_diff(
         {"other.json": {"a.b": {"old": 0.0042, "new": 0.0043, "diff": 0.0001}}}
-    ) == (
-        "   Path      Metric   Value    Change\n"
-        "other.json   a.b      0.0043   0.0001"
+    ) == textwrap.dedent(
+        """\
+        Path        Metric    Value    Change
+        other.json  a.b       0.0043   0.0001"""
     )
 
 
@@ -129,9 +139,38 @@ def test_metrics_diff_sorted():
                 "a.b.c": {"old": 1, "new": 2, "diff": 1},
             }
         }
-    ) == (
-        "    Path       Metric   Value   Change\n"
-        "metrics.yaml   a.b.c    2       1     \n"
-        "metrics.yaml   a.d.e    4       1     \n"
-        "metrics.yaml   x.b      6       1     "
+    ) == textwrap.dedent(
+        """\
+        Path          Metric    Value    Change
+        metrics.yaml  a.b.c     2        1
+        metrics.yaml  a.d.e     4        1
+        metrics.yaml  x.b       6        1"""
+    )
+
+
+def test_metrics_diff_markdown_empty():
+    assert _show_diff({}, markdown=True) == textwrap.dedent(
+        """\
+        | Path   | Metric   | Value   | Change   |
+        |--------|----------|---------|----------|"""
+    )
+
+
+def test_metrics_diff_markdown():
+    assert _show_diff(
+        {
+            "metrics.yaml": {
+                "x.b": {"old": 5, "new": 6},
+                "a.d.e": {"old": 3, "new": 4, "diff": 1},
+                "a.b.c": {"old": 1, "new": 2, "diff": 1},
+            }
+        },
+        markdown=True,
+    ) == textwrap.dedent(
+        """\
+        | Path         | Metric   | Value   | Change             |
+        |--------------|----------|---------|--------------------|
+        | metrics.yaml | a.b.c    | 2       | 1                  |
+        | metrics.yaml | a.d.e    | 4       | 1                  |
+        | metrics.yaml | x.b      | 6       | diff not supported |"""
     )