params/metrics: introduce --no-path and --old (iterative#3845)

* metrics: diff: add --no-path

Part of iterative#3690

* params: diff: introduce --no-path

* metrics: diff: introduce --old

Part of iterative#3690

dvc/command/metrics.py

@@ -87,7 +87,7 @@ def run(self):
         return 0
 
 
-def _show_diff(diff, markdown=False):
+def _show_diff(diff, markdown=False, no_path=False, old=False):
     from collections import OrderedDict
 
     from dvc.utils.diff import table
@@ -96,16 +96,23 @@ def _show_diff(diff, markdown=False):
     for fname, mdiff in diff.items():
         sorted_mdiff = OrderedDict(sorted(mdiff.items()))
         for metric, change in sorted_mdiff.items():
-            rows.append(
-                [
-                    fname,
-                    metric,
-                    change["new"],
-                    change.get("diff", "diff not supported"),
-                ]
-            )
+            row = [] if no_path else [fname]
+            row.append(metric)
+            if old:
+                row.append(change.get("old"))
+            row.append(change["new"])
+            row.append(change.get("diff", "diff not supported"))
+            rows.append(row)
+
+    header = [] if no_path else ["Path"]
+    header.append("Metric")
+    if old:
+        header.extend(["Old", "New"])
+    else:
+        header.append("Value")
+    header.append("Change")
 
-    return table(["Path", "Metric", "Value", "Change"], rows, markdown)
+    return table(header, rows, markdown)
 
 
 class CmdMetricsDiff(CmdBase):
@@ -124,7 +131,9 @@ def run(self):
 
                 logger.info(json.dumps(diff))
             else:
-                table = _show_diff(diff, self.args.show_md)
+                table = _show_diff(
+                    diff, self.args.show_md, self.args.no_path, self.args.old
+                )
                 if table:
                     logger.info(table)
 
@@ -269,6 +278,18 @@ def add_parser(subparsers, parent_parser):
         default=False,
         help="Show tabulated output in the Markdown format (GFM).",
     )
+    metrics_diff_parser.add_argument(
+        "--no-path",
+        action="store_true",
+        default=False,
+        help="Don't show metric path.",
+    )
+    metrics_diff_parser.add_argument(
+        "--old",
+        action="store_true",
+        default=False,
+        help="Show old metric value.",
+    )
     metrics_diff_parser.set_defaults(func=CmdMetricsDiff)
 
     METRICS_REMOVE_HELP = "Remove metric mark on a DVC-tracked file."

dvc/command/params.py

@@ -8,16 +8,25 @@
 logger = logging.getLogger(__name__)
 
 
-def _show_diff(diff, markdown=False):
+def _show_diff(diff, markdown=False, no_path=False):
     from dvc.utils.diff import table
 
     rows = []
     for fname, pdiff in diff.items():
         sorted_pdiff = OrderedDict(sorted(pdiff.items()))
         for param, change in sorted_pdiff.items():
-            rows.append([fname, param, change["old"], change["new"]])
+            row = [] if no_path else [fname]
+            row.append(param)
+            row.append(change["old"])
+            row.append(change["new"])
+            rows.append(row)
 
-    return table(["Path", "Param", "Old", "New"], rows, markdown)
+    header = [] if no_path else ["Path"]
+    header.append("Param")
+    header.append("Old")
+    header.append("New")
+
+    return table(header, rows, markdown)
 
 
 class CmdParamsDiff(CmdBase):
@@ -34,7 +43,7 @@ def run(self):
 
                 logger.info(json.dumps(diff))
             else:
-                table = _show_diff(diff, self.args.show_md)
+                table = _show_diff(diff, self.args.show_md, self.args.no_path)
                 if table:
                     logger.info(table)
 
@@ -100,4 +109,10 @@ def add_parser(subparsers, parent_parser):
         default=False,
         help="Show tabulated output in the Markdown format (GFM).",
     )
+    params_diff_parser.add_argument(
+        "--no-path",
+        action="store_true",
+        default=False,
+        help="Don't show params path.",
+    )
     params_diff_parser.set_defaults(func=CmdParamsDiff)

scripts/completion/dvc.bash

@@ -38,7 +38,7 @@ _dvc_lock_COMPGEN=_dvc_compgen_DVCFiles
 _dvc_metrics='add diff modify remove show'
 _dvc_metrics_add='-t --type -x --xpath'
 _dvc_metrics_add_COMPGEN=_dvc_compgen_files
-_dvc_metrics_diff='--targets -t --type -x --xpath -R --show-json --show-md'
+_dvc_metrics_diff='--targets -t --type -x --xpath -R --show-json --show-md --no-path --old'
 _dvc_metrics_modify='-t --type -x --xpath'
 _dvc_metrics_modify_COMPGEN=_dvc_compgen_files
 _dvc_metrics_remove=''
@@ -48,7 +48,7 @@ _dvc_metrics_show_COMPGEN=_dvc_compgen_files
 _dvc_move=''
 _dvc_move_COMPGEN=_dvc_compgen_files
 _dvc_params='diff'
-_dvc_params_diff='--all --show-json --show-md'
+_dvc_params_diff='--all --show-json --show-md --no-path'
 _dvc_pipeline='list show'
 _dvc_pipeline_list=''
 _dvc_pipeline_show='-c --commands -o --outs --ascii --dot --tree -l --locked'

tests/unit/command/test_metrics.py

@@ -17,6 +17,9 @@ def test_metrics_diff(dvc, mocker):
             "--targets",
             "target1",
             "target2",
+            "--show-md",
+            "--no-path",
+            "--old",
         ]
     )
     assert cli_args.func == CmdMetricsDiff
@@ -174,3 +177,41 @@ def test_metrics_diff_markdown():
         | metrics.yaml | a.d.e    | 4       | 1                  |
         | metrics.yaml | x.b      | 6       | diff not supported |"""
     )
+
+
+def test_metrics_diff_no_path():
+    assert _show_diff(
+        {
+            "metrics.yaml": {
+                "x.b": {"old": 5, "new": 6, "diff": 1},
+                "a.d.e": {"old": 3, "new": 4, "diff": 1},
+                "a.b.c": {"old": 1, "new": 2, "diff": 1},
+            }
+        },
+        no_path=True,
+    ) == textwrap.dedent(
+        """\
+        Metric    Value    Change
+        a.b.c     2        1
+        a.d.e     4        1
+        x.b       6        1"""
+    )
+
+
+def test_metrics_diff_with_old():
+    assert _show_diff(
+        {
+            "metrics.yaml": {
+                "x.b": {"old": 5, "new": 6, "diff": 1},
+                "a.d.e": {"old": 3, "new": 4, "diff": 1},
+                "a.b.c": {"old": 1, "new": 2, "diff": 1},
+            }
+        },
+        old=True,
+    ) == textwrap.dedent(
+        """\
+        Path          Metric    Old    New    Change
+        metrics.yaml  a.b.c     1      2      1
+        metrics.yaml  a.d.e     3      4      1
+        metrics.yaml  x.b       5      6      1"""
+    )

tests/unit/command/test_params.py

@@ -7,7 +7,16 @@
 
 def test_params_diff(dvc, mocker):
     cli_args = parse_args(
-        ["params", "diff", "HEAD~10", "HEAD~1", "--all", "--show-json"]
+        [
+            "params",
+            "diff",
+            "HEAD~10",
+            "HEAD~1",
+            "--all",
+            "--show-json",
+            "--show-md",
+            "--no-path",
+        ]
     )
     assert cli_args.func == CmdParamsDiff
 
@@ -142,3 +151,22 @@ def test_params_diff_markdown():
         | params.yaml | a.d.e   | None  | 4     |
         | params.yaml | x.b     | 5     | 6     |"""
     )
+
+
+def test_params_diff_no_path():
+    assert _show_diff(
+        {
+            "params.yaml": {
+                "x.b": {"old": 5, "new": 6},
+                "a.d.e": {"old": 3, "new": 4},
+                "a.b.c": {"old": 1, "new": 2},
+            }
+        },
+        no_path=True,
+    ) == textwrap.dedent(
+        """\
+        Param    Old    New
+        a.b.c    1      2
+        a.d.e    3      4
+        x.b      5      6"""
+    )