Refine the auto-formatting settings (#48618)

Backport of #48446. Update the Eclipse formatter settings as follows:

* Split arguments for methods, constructors etc into separate lines when
  they wrap
* Enable "joined wrapped lines", which basically means the formatter
  will ignore existing line breaks and join and re-wrap statements. I
  had originally hesitated about enabling this, but without it the
  codebase's style won't be as consistent as it should be, defeating the
  point of all this formatting business.
* Disable formatting between `// tag::` and `// end::` comments, which
  are the code snippet markers for the docs. They need a different line
  length, which isn't possible to configure separately.
* Detect and preserve aligned line comments at the end of consecutive
  lines.
* And a bunch of other tweaks.

Also update the contribution guidelines.
This commit is contained in:
Rory Hunter 2019-10-29 10:40:03 +00:00 committed by GitHub
parent 3c77c50f5f
commit 61a4e24ecf
No known key found for this signature in database
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2 changed files with 36 additions and 26 deletions

View File

@ -29,7 +29,7 @@
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_for_inits" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_semicolon_in_for" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.align_with_spaces" value="false"/>
<setting id="org.eclipse.jdt.core.formatter.disabling_tag" value="@formatter:off"/>
<setting id="org.eclipse.jdt.core.formatter.disabling_tag" value="tag::"/>
<setting id="org.eclipse.jdt.core.formatter.continuation_indentation" value="1"/>
<setting id="org.eclipse.jdt.core.formatter.number_of_blank_lines_before_code_block" value="0"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_switch_case_expressions" value="do not insert"/>
@ -39,15 +39,15 @@
<setting id="org.eclipse.jdt.core.formatter.blank_lines_after_package" value="1"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_multiple_local_declarations" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.parentheses_positions_in_if_while_statement" value="common_lines"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_arguments_in_enum_constant" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_arguments_in_enum_constant" value="48"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_angle_bracket_in_parameterized_type_reference" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.comment.indent_root_tags" value="false"/>
<setting id="org.eclipse.jdt.core.formatter.wrap_before_or_operator_multicatch" value="true"/>
<setting id="org.eclipse.jdt.core.formatter.enabling_tag" value="@formatter:on"/>
<setting id="org.eclipse.jdt.core.formatter.enabling_tag" value="end::"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_closing_brace_in_block" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.comment.count_line_length_from_starting_position" value="true"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_parenthesized_expression_in_return" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_throws_clause_in_method_declaration" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_throws_clause_in_method_declaration" value="80"/>
<setting id="org.eclipse.jdt.core.formatter.insert_new_line_after_annotation_on_parameter" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_arrow_in_switch_case" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.wrap_before_multiplicative_operator" value="true"/>
@ -64,7 +64,7 @@
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_switch" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_parameterized_type_references" value="0"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_anonymous_type_declaration" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_logical_operator" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_logical_operator" value="48"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_parenthesized_expression" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.keep_annotation_declaration_on_one_line" value="one_line_never"/>
<setting id="org.eclipse.jdt.core.formatter.insert_new_line_after_annotation_on_enum_constant" value="insert"/>
@ -89,7 +89,7 @@
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_assignment_operator" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_brace_in_type_declaration" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_for" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.comment.preserve_white_space_between_code_and_line_comments" value="false"/>
<setting id="org.eclipse.jdt.core.formatter.comment.preserve_white_space_between_code_and_line_comments" value="true"/>
<setting id="org.eclipse.jdt.core.formatter.insert_new_line_after_annotation_on_local_variable" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.brace_position_for_method_declaration" value="end_of_line"/>
<setting id="org.eclipse.jdt.core.formatter.blank_lines_before_abstract_method" value="1"/>
@ -98,7 +98,7 @@
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_method_invocation" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_union_type_in_multicatch" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_colon_in_for" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.keep_type_declaration_on_one_line" value="one_line_never"/>
<setting id="org.eclipse.jdt.core.formatter.keep_type_declaration_on_one_line" value="one_line_if_empty"/>
<setting id="org.eclipse.jdt.core.formatter.number_of_blank_lines_at_beginning_of_method_body" value="0"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_closing_angle_bracket_in_type_arguments" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.keep_else_statement_on_same_line" value="false"/>
@ -128,11 +128,11 @@
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_method_invocation" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_bitwise_operator" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.put_empty_statement_on_new_line" value="true"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_parameters_in_constructor_declaration" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_parameters_in_constructor_declaration" value="48"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_type_parameters" value="0"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_method_invocation_arguments" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_arguments_in_method_invocation" value="48"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_throws_clause_in_constructor_declaration" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_throws_clause_in_constructor_declaration" value="64"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_compact_loops" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.comment.clear_blank_lines_in_block_comment" value="false"/>
<setting id="org.eclipse.jdt.core.formatter.insert_new_line_before_catch_in_try_statement" value="do not insert"/>
@ -143,7 +143,7 @@
<setting id="org.eclipse.jdt.core.formatter.alignment_for_relational_operator" value="0"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_array_initializer" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_unary_operator" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_expressions_in_array_initializer" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_expressions_in_array_initializer" value="48"/>
<setting id="org.eclipse.jdt.core.formatter.format_line_comment_starting_on_first_column" value="true"/>
<setting id="org.eclipse.jdt.core.formatter.number_of_empty_lines_to_preserve" value="1"/>
<setting id="org.eclipse.jdt.core.formatter.parentheses_positions_in_annotation" value="common_lines"/>
@ -167,7 +167,7 @@
<setting id="org.eclipse.jdt.core.formatter.number_of_blank_lines_after_code_block" value="0"/>
<setting id="org.eclipse.jdt.core.formatter.comment.align_tags_names_descriptions" value="false"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_enum_constant" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_superinterfaces_in_type_declaration" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_superinterfaces_in_type_declaration" value="64"/>
<setting id="org.eclipse.jdt.core.formatter.keep_if_then_body_block_on_one_line" value="one_line_never"/>
<setting id="org.eclipse.jdt.core.formatter.blank_lines_before_first_class_body_declaration" value="0"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_conditional_expression" value="48"/>
@ -189,8 +189,8 @@
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_method_invocation" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_paren_in_while" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_closing_paren_in_switch" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_method_declaration" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.join_wrapped_lines" value="false"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_method_declaration" value="48"/>
<setting id="org.eclipse.jdt.core.formatter.join_wrapped_lines" value="true"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_between_empty_parens_in_constructor_declaration" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.wrap_before_conditional_operator" value="true"/>
<setting id="org.eclipse.jdt.core.formatter.indent_switchstatements_compare_to_cases" value="true"/>
@ -202,12 +202,12 @@
<setting id="org.eclipse.jdt.core.formatter.alignment_for_bitwise_operator" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.brace_position_for_annotation_type_declaration" value="end_of_line"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_colon_in_for" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_resources_in_try" value="80"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_resources_in_try" value="48"/>
<setting id="org.eclipse.jdt.core.formatter.use_tabs_only_for_leading_indentations" value="false"/>
<setting id="org.eclipse.jdt.core.formatter.parentheses_positions_in_try_clause" value="common_lines"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_selector_in_method_invocation" value="80"/>
<setting id="org.eclipse.jdt.core.formatter.parentheses_positions_in_try_clause" value="separate_lines_if_wrapped"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_selector_in_method_invocation" value="48"/>
<setting id="org.eclipse.jdt.core.formatter.never_indent_block_comments_on_first_column" value="false"/>
<setting id="org.eclipse.jdt.core.formatter.keep_code_block_on_one_line" value="one_line_never"/>
<setting id="org.eclipse.jdt.core.formatter.keep_code_block_on_one_line" value="one_line_if_empty"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_opening_paren_in_synchronized" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_constructor_declaration_throws" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.tabulation.size" value="4"/>
@ -225,7 +225,7 @@
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_question_in_wildcard" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.blank_lines_before_method" value="1"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_superclass_in_type_declaration" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_superinterfaces_in_enum_declaration" value="49"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_superinterfaces_in_enum_declaration" value="48"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_parenthesized_expression_in_throw" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.wrap_before_assignment_operator" value="false"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_colon_in_labeled_statement" value="do not insert"/>
@ -240,7 +240,7 @@
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_closing_angle_bracket_in_type_parameters" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.parentheses_positions_in_method_delcaration" value="separate_lines_if_wrapped"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_compact_if" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.keep_lambda_body_block_on_one_line" value="one_line_always"/>
<setting id="org.eclipse.jdt.core.formatter.keep_lambda_body_block_on_one_line" value="one_line_if_single_item"/>
<setting id="org.eclipse.jdt.core.formatter.indent_empty_lines" value="false"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_type_arguments" value="0"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_comma_in_parameterized_type_reference" value="do not insert"/>
@ -291,7 +291,7 @@
<setting id="org.eclipse.jdt.core.formatter.alignment_for_parameters_in_method_declaration" value="48"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_between_brackets_in_array_type_reference" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_angle_bracket_in_type_parameters" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_string_concatenation" value="16"/>
<setting id="org.eclipse.jdt.core.formatter.alignment_for_string_concatenation" value="48"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_semicolon_in_for" value="do not insert"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_after_comma_in_method_declaration_throws" value="insert"/>
<setting id="org.eclipse.jdt.core.formatter.insert_space_before_opening_bracket_in_array_allocation_expression" value="do not insert"/>

View File

@ -109,15 +109,15 @@ and `JAVA11_HOME` available so that the tests can pass.
Elasticsearch uses the Gradle wrapper for its build. You can execute Gradle
using the wrapper via the `gradlew` script in the root of the repository.
We support development in the Eclipse and IntelliJ IDEs.
For Eclipse, the minimum version that we support is [4.13][eclipse].
We support development in the Eclipse and IntelliJ IDEs.
For Eclipse, the minimum version that we support is [4.13][eclipse].
For IntelliJ, the minimum version that we support is [IntelliJ 2017.2][intellij].
### Configuring IDEs And Running Tests
Eclipse users can automatically configure their IDE: `./gradlew eclipse`
then `File: Import: Gradle : Existing Gradle Project`.
Additionally you will want to ensure that Eclipse is using 2048m of heap by modifying
Additionally you will want to ensure that Eclipse is using 2048m of heap by modifying
`eclipse.ini` accordingly to avoid GC overhead and OOM errors.
IntelliJ users can automatically configure their IDE: `./gradlew idea`
@ -175,9 +175,12 @@ Please follow these formatting guidelines:
* Java indent is 4 spaces
* Line width is 140 characters
* Lines of code surrounded by `// tag` and `// end` comments are included
* Lines of code surrounded by `// tag::NAME` and `// end::NAME` comments are included
in the documentation and should only be 76 characters wide not counting
leading indentation
leading indentation. Such regions of code are not formatted automatically as
it is not possible to change the line length rule of the formatter for
part of a file. Please format such sections sympathetically with the rest
of the code, while keeping lines to maximum length of 76 characters.
* Wildcard imports (`import foo.bar.baz.*`) are forbidden and will cause
the build to fail. This can be done automatically by your IDE:
* Eclipse: `Preferences->Java->Code Style->Organize Imports`. There are
@ -187,6 +190,13 @@ Please follow these formatting guidelines:
There are two configuration options: `Class count to use import with
'*'` and `Names count to use static import with '*'`. Set their values
to 99999 or some other absurdly high value.
* If *absolutely* necessary, you can disable formatting for regions of code
with the `// tag::NAME` and `// end::NAME` directives, but note that
these are intended for use in documentation, so please make it clear what
you have done, and only do this where the benefit clearly outweighs the
decrease in consistency.
* Note that JavaDoc and block comments i.e. `/* ... */` are not formatted,
but line comments i.e `// ...` are.
#### Editor / IDE Support
@ -213,7 +223,7 @@ Spotless will write files to
different copies of the formatted files, so that you can see how they
differ and infer what is the problem.
The `paddedCell() option is disabled for normal operation in order to
The `paddedCell()` option is disabled for normal operation in order to
detect any misbehaviour. You can enabled the option from the command line
by running Gradle with `-Dspotless.paddedcell`.