Add axis types as chart operator flags

changelog/next/features/4147-chart-axis-type.md

@@ -0,0 +1 @@
+The chart operator now accepts the flags `--x-axis-type` and `--y-axis-type` for `bar`, `line`, and `area` charts, with the possible values being `log` and `linear`, with `linear` as the default value. Setting these flags defines the scale (logarithmic or linear) on the Tenzir App chart visualization.

libtenzir/builtins/operators/chart.cpp

@@ -724,10 +724,14 @@ chart_definition chart_definitions[] = {
       {.attr = "x", .flag = "-x,--x-axis", .type = flag_type::field_name, .default_ = nth_field{0}, .allow_lists = false, .req = requirement::strictly_increasing,},
       {.attr = "y", .flag = "-y,--y-axis", .type = flag_type::field_name, .default_ = nth_field{1, nth_field::all_the_rest}, .allow_lists = true,},
       {.attr = "position", .flag = "--position", .type = flag_type::attribute_value, .default_ = attribute_value{"grouped"}, .allow_lists = false,},
+      {.attr = "xAxisType", .flag = "--x-axis-type", .type = flag_type::attribute_value, .default_ = attribute_value{"linear"}, .allow_lists = false,},
+      {.attr = "yAxisType", .flag = "--y-axis-type", .type = flag_type::attribute_value, .default_ = attribute_value{"linear"}, .allow_lists = false,},
     },
     .verifications = {
       disallow_mixmatch_between_explicit_and_implicit_arguments({"x", "y"}),
       require_attribute_value_one_of("position", {"grouped", "stacked"}),
+      require_attribute_value_one_of("xAxisType", {"log", "linear"}),
+      require_attribute_value_one_of("yAxisType", {"log", "linear"}),
     },
   },
   // `area` is equivalent to `line`.
@@ -738,10 +742,14 @@ chart_definition chart_definitions[] = {
       {.attr = "x", .flag = "-x,--x-axis", .type = flag_type::field_name, .default_ = nth_field{0}, .allow_lists = false, .req = requirement::strictly_increasing,},
       {.attr = "y", .flag = "-y,--y-axis", .type = flag_type::field_name, .default_ = nth_field{1, nth_field::all_the_rest}, .allow_lists = true,},
       {.attr = "position", .flag = "--position", .type = flag_type::attribute_value, .default_ = attribute_value{"grouped"}, .allow_lists = false,},
+      {.attr = "xAxisType", .flag = "--x-axis-type", .type = flag_type::attribute_value, .default_ = attribute_value{"linear"}, .allow_lists = false,},
+      {.attr = "yAxisType", .flag = "--y-axis-type", .type = flag_type::attribute_value, .default_ = attribute_value{"linear"}, .allow_lists = false,},
     },
     .verifications = {
       disallow_mixmatch_between_explicit_and_implicit_arguments({"x", "y"}),
       require_attribute_value_one_of("position", {"grouped", "stacked"}),
+      require_attribute_value_one_of("xAxisType", {"log", "linear"}),
+      require_attribute_value_one_of("yAxisType", {"log", "linear"}),
     },
   },
   // `bar` is equivalent to `line`, except the requirement on `x` is for the values to be unique.
@@ -752,10 +760,14 @@ chart_definition chart_definitions[] = {
       {.attr = "x", .flag = "-x,--x-axis", .type = flag_type::field_name, .default_ = nth_field{0}, .allow_lists = false, .req = requirement::unique,},
       {.attr = "y", .flag = "-y,--y-axis", .type = flag_type::field_name, .default_ = nth_field{1, nth_field::all_the_rest}, .allow_lists = true,},
       {.attr = "position", .flag = "--position", .type = flag_type::attribute_value, .default_ = attribute_value{"grouped"}, .allow_lists = false,},
+      {.attr = "xAxisType", .flag = "--x-axis-type", .type = flag_type::attribute_value, .default_ = attribute_value{"linear"}, .allow_lists = false,},
+      {.attr = "yAxisType", .flag = "--y-axis-type", .type = flag_type::attribute_value, .default_ = attribute_value{"linear"}, .allow_lists = false,},
     },
     .verifications = {
       disallow_mixmatch_between_explicit_and_implicit_arguments({"x", "y"}),
       require_attribute_value_one_of("position", {"grouped", "stacked"}),
+      require_attribute_value_one_of("xAxisType", {"log", "linear"}),
+      require_attribute_value_one_of("yAxisType", {"log", "linear"}),
     },
   },
   // `pie` chart is equivalent to `line` and `bar`, except

web/docs/operators/chart.md

@@ -45,6 +45,18 @@ Control how the values are grouped when rendered as a chart.
 Possible values are `grouped` and `stacked`.
 Defaults to `grouped`.
 
+### `x-axis-type=<x-axis-type>` (`line`, `area`, and `bar` charts only)
+
+Sets the x-axis scale type.
+Possible values are `linear` and `log`.
+Defaults to `linear`.
+
+### `y-axis-type=<y-axis-type>` (`line`, `area`, and `bar` charts only)
+
+Sets the y-axis scale type.
+Possible values are `linear` and `log`.
+Defaults to `linear`.
+
 ### `--name <field>` (`pie` chart only)
 
 Set the field used for the names of the segments.