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https://github.com/kisstkondoros/codemetrics

VSCode extension which shows the complexity information for TypeScript class members
https://github.com/kisstkondoros/codemetrics

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VSCode extension which shows the complexity information for TypeScript class members

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README 

        
# Code Metrics - Visual Studio Code Extension



Computes complexity in TypeScript / JavaScript / Lua files.



# Complexity calculation



The steps of the calculation:



-   create an AST from the input source file

-   walk through each and every node of it

-   depending on the type of the node and the configuration associated with it create a new entry about the node.

    This entry contains everything necessary for further use

    (e.g. a textual representation for the node, complexity increment, child nodes etc.)

-   show the sum of complexity of child nodes for methods and the maximum of child nodes for classes



Please note that it is not a standard metric, but it is a close approximation

of [Cyclomatic complexity](https://en.wikipedia.org/wiki/Cyclomatic_complexity).



Please also note that it is possible to balance the complexity calculation for the

project / team / personal taste by adjusting the relevant configuration entries

(content assist is provided for all of them for easier configuration).



For example if one prefers [guard clauses](https://refactoring.com/catalog/replaceNestedConditionalWithGuardClauses.html),

and is ok with all the branches in switch statements then the following could be applied:



```json

"codemetrics.nodeconfiguration.ReturnStatement": 0,

"codemetrics.nodeconfiguration.CaseClause": 0,

"codemetrics.nodeconfiguration.DefaultClause": 0

```



If You want to know the causes You can click on the code lens to list all the entries for a given method or class. (This also allows You to quickly navigate to the corresponding code)



![Metric details example, showing how one might check the overall complexity for a method by clicking on the codelens](https://raw.githubusercontent.com/kisstkondoros/codemetrics/master/images/metric_details.png)



## It looks like this



![First sample, demonstrating a constructor with overall complexity of 21](https://raw.githubusercontent.com/kisstkondoros/codemetrics/master/images/Sample1.png)



![Second sample, demonstrating a constructor with overall complexity of 1](https://raw.githubusercontent.com/kisstkondoros/codemetrics/master/images/Sample2.png)



![Third sample, demonstrating a method with overall complexity of 5](https://raw.githubusercontent.com/kisstkondoros/codemetrics/master/images/Sample3.png)



## Install



[How to install Visual Studio Code extensions](https://code.visualstudio.com/docs/editor/extension-gallery)



[Direct link to Visual Studio Code Marketplace](https://marketplace.visualstudio.com/items?itemName=kisstkondoros.vscode-codemetrics)



## Customization



In the workspace settings one can override the defaults.

For a complete list please check the configuration section in the package.json.

For the most commonly used ones, one should do a search for `codemetrics.basics`

in the settings ui.



```javascript

{

  // highest complexity level will be set when it exceeds 15

  "codemetrics.basics.ComplexityLevelExtreme" : 15,



  // Hides code lenses with complexity lesser than the given value

  "codemetrics.basics.CodeLensHiddenUnder" : 5,



  // Description for the highest complexity level

  "codemetrics.basics.ComplexityLevelExtremeDescription" : "OMG split this up!",



  // someone uses 'any', it must be punished

  "codemetrics.nodeconfiguration.AnyKeyword": 100

}

```



## Commands



-   Toggle code lenses for arrow functions

-   Toggle code metrics



They can be bound in the keybindings.json (File -> Preferences -> Keyboard Shortcuts)



```javascript

{ "key": "f4",                    "command": "codemetrics.toggleCodeMetricsForArrowFunctions",

                                     "when": "editorTextFocus" },

{ "key": "f5",                    "command": "codemetrics.toggleCodeMetricsDisplayed",

                                     "when": "editorTextFocus" }

```



### Change Log



-   1.26.1

    -   Update tsmetrics-core to 1.4.1 (fixes default for `IfWithElseStatement` )

-   1.26.0

    -   Update tsmetrics-core to 1.4.0 (comes with a new config `IgnoredFunctionNames`)

-   1.25.2

    -   Update tsmetrics-core to 1.3.1

-   1.25.1

    -   Update tsmetrics-core to 1.3.0

-   1.25.0

    -   Update dependencies

    -   Make it work for vue setup scripts

-   1.24.0

    -   Jump to selection from the quick pick menu

-   1.23.1

    -   Update dependencies

-   1.23.0

    -   Use QuickPickItems instead of plain strings

    -   Update tsmetrics-core to 1.2.1

-   1.22.1

    -   Update change log

-   1.22.0

    -   Update the activationEvents property (contribution from [@igorskyflyer](https://github.com/igorskyflyer) )

    -   Add "onLanguage:vue" to the list of activation events

-   1.21.0

    -   Show all items in the quick pick menu

-   1.20.0

    -   Migrate to webpack

    -   Adjust section about configuration options

    -   Update tsmetrics-core

-   1.19.1

    -   Update dependencies

-   1.19.0

    -   Add support for ts based vue components

-   1.18.1

    -   Update dependencies

    -   Fix rounding issues

-   1.18.0

    -   Add DecorationTemplate configuration (contribution from [@luchsamapparat](https://github.com/luchsamapparat) )

-   1.17.4

    -   Update dependencies

-   1.17.3

    -   Update dependencies

-   1.17.2

    -   Fix invalid default color definition

-   1.17.1

    -   Add file and untitled scheme explicitly

-   1.17.0

    -   Adjust codebase to new API standards of VSCode

    -   Adjust filter boundaries which are used for color decorators

-   1.16.0

    -   Update dev dependency for vscode to avoid vulnerability warning

    -   Add description about complexity calculation and configuration

-   1.15.0

    -   Update tsmetrics-core to v1.0.0

-   1.14.0

    -   Make decoration colors configurable

        -   The following properties were introduced:

            -   codemetrics.basics.ComplexityColorLow

            -   codemetrics.basics.ComplexityColorNormal

            -   codemetrics.basics.ComplexityColorHigh

            -   codemetrics.basics.ComplexityColorExtreme

-   1.13.0

    -   Update vscode version to 1.1.10

    -   Avoid indentation distortion by moving decorations to the end of the line

    -   Debounce EditorDecoration update requests properly

-   1.12.0

    -   Add support for Visual Studio Live Share

-   1.11.2

    -   Improve decorator lifecycle management

-   1.11.1

    -   Only create new decorations if the settings has changed

-   1.11.0

    -   Add new mode OverviewRuler

    -   Update tsmetrics-core and typescript dependencies

-   1.10.0

    -   Add support for embedded scripts in vue and html files

-   1.9.6

    -   Disable diagnostic report for code metrics

-   1.9.5

    -   Add .vscode-test to .vscodeignore

-   1.9.4

    -   Replace new line characters in quick pick menu with spaces

-   1.9.3

    -   Update readme

-   1.9.2

    -   Fix behavior of command 'codemetrics.toggleCodeMetricsForArrowFunctions'

-   1.9.1

    -   Set default of ObjectLiteralExpression to 0

-   1.9.0

    -   Implement file exclusion by glob pattern

-   1.8.0

    -   Upgrade to [email protected]

    -   Use new collector types from tsmetrics-core (show complexity maximum on class level)

-   1.7.2

    -   Make it possible to enable / disable diagnostics

-   1.7.1

    -   Always use activeTextEditor in change callbacks

-   1.7.0

    -   Add experimental diagnostics support

    -   Add experimental support for Lua

-   1.6.1

    -   Fix spelling error of 'threshold' in configuration

-   1.6.0

    -   Execute code metrics computation in language server

-   1.5.0

    -   Upgrade vsdcode and typescript dependency

    -   Remove unused typings

    -   Extract code metrics related util class

    -   Move CodeMetricsCodeLensProvider to codelensprovider folder

    -   Add text decoration based on code metrics

        -   Appearance can be configured with the following properties:

            -   "codemetrics.basics.DecorationModeEnabled"

            -   "codemetrics.basics.CodeLensEnabled"

-   1.4.1

    -   Update changelog

-   1.4.0

    -   Expose code lens location related configuration properties

        -   "codemetrics.basics.MetricsForClassDeclarationsToggled"

        -   "codemetrics.basics.MetricsForConstructorsToggled"

        -   "codemetrics.basics.MetricsForEnumDeclarationsToggled"

        -   "codemetrics.basics.MetricsForFunctionDeclarationsToggled"

        -   "codemetrics.basics.MetricsForFunctionExpressionsToggled"

        -   "codemetrics.basics.MetricsForMethodDeclarationsToggled"

        -   "codemetrics.basics.MetricsForArrowFunctionsToggled"

-   1.3.0

    -   Add new properties to selectively disable codemetrics for different languages

        -   "codemetrics.basics.EnabledForTSX"

        -   "codemetrics.basics.EnabledForJSX"

        -   "codemetrics.basics.EnabledForTS"

        -   "codemetrics.basics.EnabledForJS"

    -   Introduce file size limit

        -   "codemetrics.basics.FileSizeLimitMB" default is 0.5 MB

-   1.2.2

    -   Fix behaviour of CodeLensHiddenUnder

-   1.2.1

    -   Change type of IfWithElseStatement property to number

-   1.2.0

    -   Add JSX and TSX support, special thanks to [Aron Adler](https://github.com/Arrow7000)

-   1.1.6

    -   Fix possible NPE in 'triggerCodeLensComputation'

    -   Remove language restriction from 'activationEvents'

-   1.1.5

    -   Udpate logo

-   1.1.4

    -   Change textual representation in quick pick

-   1.1.3

    -   Fix typo in codemetrics.basics.ComplexityLevelNormalDescription

-   1.1.2

    -   Fix dependency issue with 'fs'

-   1.1.1

    -   Fix issue with non up to date source file processing

-   1.1.0

    -   Parse logic refactored to be a separate npm module [tsmetrics-core](https://www.npmjs.com/package/tsmetrics-core) allowing to create a gulp plugin as well [gulp-tsmetrics](https://www.npmjs.com/package/gulp-tsmetrics)

    -   QuickPick now works with a simplified and more meaningful list, which shows only one level of the hierarchy at once

-   1.0.1

    -   Default keyboard bindings removed

    -   CodeLens cache invalidation side effect eliminated (dirty file)

    -   Path concatenation replaced with path.join

-   1.0.0

    -   Configuration properties has been renamed and listed in extension manifest

    -   New property CodeLensHiddenUnder introduced to be able to hide uninteresting code lenses

-   0.5.0

    -   Commands to alter code metrics behaviour added (toggle code metrics and toggle code lenses for arrow functions)

-   0.4.1

    -   Showing complexity for arrow functions as well

-   0.4.0

    -   Added JavaScript support

    -   Removed module declaration from the complexity calculation

    -   Function related complexity calculation revised

-   0.3.1

    -   Fixed NPE in navigation command

-   0.3.0

    -   Use script target defined in tsconfig

-   0.2.0

    -   Code Metrics info command changed to display a QuickPick menu

-   0.1.0

    -   Added command to be able to show code lens details

-   0.0.2

    -   TypeScript added as real dependency

-   0.0.1

    -   Initial project setup



### License



Licensed under MIT