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Rule 4.1.3 Try to use 'val' instead of 'var' for variable declaration (
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…#328)

Adding simple rule that prohibits usage of var

### What's done:
1) Adding visitor for SAY_NO_TO_VAR rule
2) Creating utilities for getting variable and usages
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orchestr7 authored Sep 30, 2020
1 parent 7030f70 commit 3a38311
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Showing 16 changed files with 690 additions and 42 deletions.
7 changes: 7 additions & 0 deletions diktat-analysis.yml
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Expand Up @@ -266,6 +266,13 @@
- name: STRING_TEMPLATE_CURLY_BRACES
enabled: true
configuration: {}
typeReferenceLength: '25' # max length of type reference
# Variables with `val` modifier - are immutable (read-only). Usage of such variables instead of `var` variables increases
# robustness and readability of code, because `var` variables can be reassigned several times in the business logic.
# This rule prohibits usage of `var`s as local variables - the only exception is accumulators and counters
- name: SAY_NO_TO_VAR
enabled: true
configuration: {}
# Inspection that checks if string template has redundant quotes
- name: STRING_TEMPLATE_QUOTES
enabled: true
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2 changes: 2 additions & 0 deletions diktat-rules/src/main/kotlin/generated/WarningNames.kt
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Expand Up @@ -158,6 +158,8 @@ object WarningNames {

const val TYPE_ALIAS: String = "TYPE_ALIAS"

const val SAY_NO_TO_VAR: String = "SAY_NO_TO_VAR"

const val GENERIC_VARIABLE_WRONG_DECLARATION: String = "GENERIC_VARIABLE_WRONG_DECLARATION"

const val STRING_TEMPLATE_CURLY_BRACES: String = "STRING_TEMPLATE_CURLY_BRACES"
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Expand Up @@ -98,6 +98,7 @@ enum class Warnings(private val canBeAutoCorrected: Boolean, private val warn: S

// ======== chapter 4 ========
TYPE_ALIAS(false, "variable's type is too complex and should be replaced with typealias"),
SAY_NO_TO_VAR(false, "Usage of a mutable variables with [var] modifier - is a bad style, use [val] instead"),
GENERIC_VARIABLE_WRONG_DECLARATION(true, "variable should have explicit type declaration"),
STRING_TEMPLATE_CURLY_BRACES(true, "string template has redundant curly braces"),
STRING_TEMPLATE_QUOTES(true, "string template has redundant quotes"),
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Expand Up @@ -59,6 +59,7 @@ class DiktatRuleSetProvider(private val diktatConfigFile: String = "diktat-analy
::BlankLinesRule,
::WhiteSpaceRule,
::WhenMustHaveElseRule,
::ImmutableValNoVarRule,
::FileStructureRule, // this rule should be right before indentation because it should operate on already valid code
::NewlinesRule, // newlines need to be inserted right before fixing indentation
::IndentationRule // indentation rule should be the last because it fixes formatting after all the changes done by previous rules
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@@ -0,0 +1,50 @@
package org.cqfn.diktat.ruleset.rules

import com.pinterest.ktlint.core.Rule
import com.pinterest.ktlint.core.ast.ElementType
import org.cqfn.diktat.common.config.rules.RulesConfig
import org.cqfn.diktat.ruleset.constants.Warnings.SAY_NO_TO_VAR
import org.cqfn.diktat.ruleset.utils.findAllNodesWithSpecificType
import org.cqfn.diktat.ruleset.utils.getAllUsages
import org.jetbrains.kotlin.com.intellij.lang.ASTNode
import org.jetbrains.kotlin.psi.KtBlockExpression
import org.jetbrains.kotlin.psi.KtLambdaExpression
import org.jetbrains.kotlin.psi.KtLoopExpression
import org.jetbrains.kotlin.psi.KtProperty
import org.jetbrains.kotlin.psi.psiUtil.getParentOfType

/**
* Variables with `val` modifier - are immutable (read-only).
* Usage of such variables instead of `var` variables increases robustness and readability of code,
* because `var` variables can be reassigned several times in the business logic. Of course, in some scenarios with loops or accumulators only `var`s can be used and are allowed.
* FixMe: here we should also raise warnings for a reassignment of a var (if var has no assignments except in declaration - it can be final)
*/
class ImmutableValNoVarRule(private val configRules: List<RulesConfig>) : Rule("no-var-rule") {
private lateinit var emitWarn: ((offset: Int, errorMessage: String, canBeAutoCorrected: Boolean) -> Unit)
private var isFixMode: Boolean = false

override fun visit(node: ASTNode,
autoCorrect: Boolean,
emit: (offset: Int, errorMessage: String, canBeAutoCorrected: Boolean) -> Unit) {
emitWarn = emit
isFixMode = autoCorrect

if (node.elementType == ElementType.FUN) {
node.findAllNodesWithSpecificType(ElementType.PROPERTY)
.map { it.psi as KtProperty }
// we can force to be immutable only variables that are from local context (not from class and not from file-level)
.filter { it.isLocal && it.name != null && it.parent is KtBlockExpression }
.filter { it.isVar }
.forEach { property ->
val usedInAccumulators = property.getAllUsages().any {
it.getParentOfType<KtLoopExpression>(true) != null ||
it.getParentOfType<KtLambdaExpression>(true) != null
}

if (!usedInAccumulators) {
SAY_NO_TO_VAR.warn(configRules, emitWarn, isFixMode, property.text, property.node.startOffset, property.node)
}
}
}
}
}
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Expand Up @@ -9,7 +9,7 @@ import org.cqfn.diktat.common.config.rules.RulesConfig
import org.cqfn.diktat.ruleset.constants.Warnings.LOCAL_VARIABLE_EARLY_DECLARATION
import org.cqfn.diktat.ruleset.utils.containsOnlyConstants
import org.cqfn.diktat.ruleset.utils.findAllNodesWithSpecificType
import org.cqfn.diktat.ruleset.utils.findUsagesOf
import org.cqfn.diktat.ruleset.utils.getAllUsages
import org.cqfn.diktat.ruleset.utils.getDeclarationScope
import org.cqfn.diktat.ruleset.utils.lastLineNumber
import org.jetbrains.kotlin.com.intellij.lang.ASTNode
Expand Down Expand Up @@ -82,7 +82,7 @@ class LocalVariablesRule(private val configRules: List<RulesConfig>) : Rule("loc
(it.initializer?.containsOnlyConstants() ?: false) ||
(it.initializer as? KtCallExpression).isWhitelistedMethod()
}
.associateWith(::findUsagesOf)
.associateWith { it.getAllUsages() }
.filterNot { it.value.isEmpty() }

private fun groupPropertiesByUsages(propertiesToUsages: Map<KtProperty, List<KtNameReferenceExpression>>) = propertiesToUsages
Expand Down Expand Up @@ -133,7 +133,7 @@ class LocalVariablesRule(private val configRules: List<RulesConfig>) : Rule("loc
* @return either the line on which the property is used if it is first used in the same scope, or the block in the same scope as declaration
*/
@Suppress("UnsafeCallOnNullableType")
private fun getFirstUsageStatementOrBlock(usages: List<KtNameReferenceExpression>, declarationScope: KtBlockExpression): PsiElement {
private fun getFirstUsageStatementOrBlock(usages: List<KtNameReferenceExpression>, declarationScope: KtBlockExpression?): PsiElement {
val firstUsage = usages.minBy { it.node.lineNumber()!! }!!
val firstUsageScope = firstUsage.getParentOfType<KtBlockExpression>(true)

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Expand Up @@ -506,3 +506,17 @@ data class ReplacementResult(val oldNodes: List<ASTNode>, val newNodes: List<AST
require(oldNodes.size == newNodes.size)
}
}


/**
* checks that this one node is placed after the other node in code (by comparing lines of code where nodes start)
*/
fun ASTNode.isGoingAfter(otherNode: ASTNode): Boolean {
val thisLineNumber = this.lineNumber()
val otherLineNumber = otherNode.lineNumber()

require(thisLineNumber != null) { "Node ${this.text} should have a line number" }
require(otherLineNumber != null) { "Node ${otherNode.text} should have a line number" }

return (thisLineNumber > otherLineNumber)
}
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Expand Up @@ -15,11 +15,9 @@ import org.jetbrains.kotlin.psi.KtProperty
import org.jetbrains.kotlin.psi.KtReferenceExpression
import org.jetbrains.kotlin.psi.KtStringTemplateExpression
import org.jetbrains.kotlin.psi.KtTryExpression
import org.jetbrains.kotlin.psi.psiUtil.getChildrenOfType
import org.jetbrains.kotlin.psi.psiUtil.getParentOfType
import org.jetbrains.kotlin.psi.psiUtil.isAncestor
import org.jetbrains.kotlin.psi.psiUtil.parents
import org.jetbrains.kotlin.psi.psiUtil.referenceExpression

/**
* Checks if this [KtExpression] contains only constant literals, strings with possibly constant expressions in templates,
Expand Down Expand Up @@ -49,39 +47,12 @@ fun KtExpression.containsOnlyConstants(): Boolean =
* and compiler prohibits things like `if (condition) val x = 0`.
*/
@Suppress("UnsafeCallOnNullableType")
fun KtProperty.getDeclarationScope() = getParentOfType<KtBlockExpression>(true)!!
.let { if (it is KtIfExpression) it.then!! else it }
.let { if (it is KtTryExpression) it.tryBlock else it }
as KtBlockExpression

/**
* Finds all references to [property] in the same code block.
* @return list of references as [KtNameReferenceExpression]
*/
fun findUsagesOf(property: KtProperty) = property
.getDeclarationScope()
.let { declarationScope ->
val name = property.nameAsName
declarationScope
.node
.findAllNodesWithSpecificType(ElementType.REFERENCE_EXPRESSION)
.map { it.psi as KtNameReferenceExpression }
.filter { it.getReferencedNameAsName() == name }
.filterNot {
// to avoid false triggering on objects' fields with same name as local property
(it.parent as? KtDotQualifiedExpression)?.run {
receiverExpression != it && selectorExpression?.referenceExpression() == it
} ?: false
}
.filterNot { ref ->
// to exclude usages of local properties and lambda arguments with same name
ref.parents.mapNotNull { it as? KtBlockExpression }.takeWhile { it != declarationScope }.any { block ->
block.getChildrenOfType<KtProperty>().any { it.nameAsName == name } ||
(block.parent.let { it as? KtFunctionLiteral }?.valueParameters?.any { it.nameAsName == name }
?: false)
}
}
}
fun KtProperty.getDeclarationScope() =
// FixMe: class body is missing here
this.getParentOfType<KtBlockExpression>(true)
.let { if (it is KtIfExpression) it.then!! else it }
.let { if (it is KtTryExpression) it.tryBlock else it }
as KtBlockExpression?

/**
* Checks if this [PsiElement] is an ancestor of [block].
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@@ -0,0 +1,108 @@
package org.cqfn.diktat.ruleset.utils

import com.pinterest.ktlint.core.ast.ElementType
import org.jetbrains.kotlin.com.intellij.lang.ASTNode
import org.jetbrains.kotlin.psi.KtClassBody
import org.jetbrains.kotlin.psi.KtDotQualifiedExpression
import org.jetbrains.kotlin.psi.KtNameReferenceExpression
import org.jetbrains.kotlin.psi.KtProperty
import org.jetbrains.kotlin.psi.KtFile
import org.jetbrains.kotlin.psi.KtBlockExpression
import org.jetbrains.kotlin.psi.KtElement
import org.jetbrains.kotlin.psi.KtFunctionLiteral
import org.jetbrains.kotlin.psi.psiUtil.getChildrenOfType
import org.jetbrains.kotlin.psi.psiUtil.getParentOfType
import org.jetbrains.kotlin.psi.psiUtil.parents
import org.jetbrains.kotlin.psi.psiUtil.referenceExpression

/**
* [this] - root node of a type File that is used to search all declared properties (variables)
* and it's usages (rvalues).
* (!) ONLY for nodes of File elementType
*
* @return a map of a property to it's usages
*/
fun ASTNode.collectAllDeclaredVariablesWithUsages(): Map<KtProperty, List<KtNameReferenceExpression>> {
require(this.elementType == ElementType.FILE) {
"To collect all variables in a file you need to provide file root node"
}

return this
.findAllNodesWithSpecificType(ElementType.PROPERTY)
.map { it.psi as KtProperty }
.associateWith { it.getAllUsages() }
}

/**
* Finds all references to [this] in the same code block.
* [this] - usages of this property will be searched
* @return list of references as [KtNameReferenceExpression]
*/
@Suppress("UnsafeCallOnNullableType")
fun KtProperty.getAllUsages(): List<KtNameReferenceExpression> {
return this
.getDeclarationScope()
// if declaration scope is not null - then we have found out the block where this variable is stored
// else - it is a global variable on a file level or a property on the class level
.let { declarationScope ->
// searching in the scope with declaration (in the context)
declarationScope?.getAllUsagesOfProperty(this)
// searching on the class level in class body
?: (this.getParentOfType<KtClassBody>(true)?.getAllUsagesOfProperty(this))
// searching on the file level
?: (this.getParentOfType<KtFile>(true)!!.getAllUsagesOfProperty(this))
}
}

/**
* getting all usages of a variable inside the same (or nested) block (where variable was declared)
*/
private fun KtElement.getAllUsagesOfProperty(property: KtProperty) =
this.node.findAllNodesWithSpecificType(ElementType.REFERENCE_EXPRESSION)
// filtering out all usages that are declared in the same context but are going before the variable declaration
.filter { it.isGoingAfter(property.node) }
.map { it.psi as KtNameReferenceExpression }
.filter { it.getReferencedNameAsName() == property.nameAsName }
.filterNot { expression ->
// to avoid false triggering on objects' fields with same name as property
isReferenceToFieldOfObject(expression) ||
// to exclude usages of local properties from other context (shadowed) and lambda arguments with same name
isReferenceToOtherVariableWithSameName(expression, this, property)
}

/**
* filtering object's fields (expressions) that have same name as variable
*/
private fun isReferenceToFieldOfObject(expression: KtNameReferenceExpression) =
(expression.parent as? KtDotQualifiedExpression)?.run {
receiverExpression != expression && selectorExpression?.referenceExpression() == expression
} ?: false


/**
* filtering local properties from other context (shadowed) and lambda and function arguments with same name
* going through all parent scopes from bottom to top until we will find the scope where the initial variable was declared
* all these scopes are on lower level of inheritance that's why if in one of these scopes we will find any
* variable declaration with the same name - we will understand that it is usage of another variable
*/
private fun isReferenceToOtherVariableWithSameName(expression: KtNameReferenceExpression, codeBlock: KtElement, property: KtProperty): Boolean {
return expression.parents
// getting all block expressions/class bodies/file node from bottom to the top
// FixMe: Object companion is not resolved properly yet
.filter { it is KtBlockExpression || it is KtClassBody || it is KtFile }
// until we reached the block that contains the initial declaration
.takeWhile { codeBlock != it }
.any { block ->
// this is not the expression that we needed if:
// 1) there is a new shadowed declaration for this expression (but the declaration should stay on the previous line!)
// 2) or there one of top blocks is a function/lambda that has arguments with the same name
// FixMe: in class or a file the declaration can easily go after the usage (by lines of code)
block.getChildrenOfType<KtProperty>().any { it.nameAsName == property.nameAsName && expression.node.isGoingAfter(it.node) } ||
block.parent
.let { it as? KtFunctionLiteral }
?.valueParameters
?.any { it.nameAsName == property.nameAsName }
?: false
// FixMe: also see very strange behavior of Kotlin in tests (disabled)
}
}
6 changes: 6 additions & 0 deletions diktat-rules/src/main/resources/diktat-analysis-huawei.yml
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Expand Up @@ -266,6 +266,12 @@
- name: STRING_TEMPLATE_CURLY_BRACES
enabled: true
configuration: {}
# Variables with `val` modifier - are immutable (read-only). Usage of such variables instead of `var` variables increases
# robustness and readability of code, because `var` variables can be reassigned several times in the business logic.
# This rule prohibits usage of `var`s as local variables - the only exception is accumulators and counters
- name: SAY_NO_TO_VAR
enabled: true
configuration: { }
# Inspection that checks if string template has redundant quotes
- name: STRING_TEMPLATE_QUOTES
enabled: true
Expand Down
8 changes: 7 additions & 1 deletion diktat-rules/src/main/resources/diktat-analysis.yml
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Expand Up @@ -269,11 +269,17 @@
- name: STRING_TEMPLATE_CURLY_BRACES
enabled: true
configuration: {}
# Variables with `val` modifier - are immutable (read-only). Usage of such variables instead of `var` variables increases
# robustness and readability of code, because `var` variables can be reassigned several times in the business logic.
# This rule prohibits usage of `var`s as local variables - the only exception is accumulators and counters
- name: SAY_NO_TO_VAR
enabled: true
configuration: {}
# Inspection that checks if string template has redundant quotes
- name: STRING_TEMPLATE_QUOTES
enabled: true
configuration: {}
# Checks that floating-point values are not used in arithmetic expressions
- name: FLOAT_IN_ACCURATE_CALCULATIONS
enabled: true
configuration: {}
configuration: {}
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1 comment on commit 3a38311

@0pdd
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@0pdd 0pdd commented on 3a38311 Sep 30, 2020

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I wasn't able to retrieve PDD puzzles from the code base and submit them to GitHub. If you think that it's a bug on our side, please submit it to yegor256/0pdd:

set -x && set -e && set -o pipefail && cd /tmp/0pdd20200927-12-1vn5scd/cqfn/diKTat && pdd -v -f /tmp/20200930-14406-1qwenc0 [1]: + set -e + set -o pipefail + cd /tmp/0pdd20200927-12-1vn5scd/cqfn/diKTat + pdd -v -f /tmp/20200930-14406-1qwenc0 My version is 0.20.5 Ruby version is 2.6.0 at...

Please, copy and paste this stack trace to GitHub:

UserError
set -x && set -e && set -o pipefail && cd /tmp/0pdd20200927-12-1vn5scd/cqfn/diKTat && pdd -v -f /tmp/20200930-14406-1qwenc0 [1]:
+ set -e
+ set -o pipefail
+ cd /tmp/0pdd20200927-12-1vn5scd/cqfn/diKTat
+ pdd -v -f /tmp/20200930-14406-1qwenc0

My version is 0.20.5
Ruby version is 2.6.0 at x86_64-linux
Reading /tmp/0pdd20200927-12-1vn5scd/cqfn/diKTat
403 file(s) found, 653 excluded
/tmp/0pdd20200927-12-1vn5scd/cqfn/diKTat/diktat-rules/src/test/resources/test/paragraph3/src/main/A/FileSize2000.kt is a binary file (0 bytes)
/tmp/0pdd20200927-12-1vn5scd/cqfn/diKTat/logo-1024.png is a binary file (210617 bytes)
/tmp/0pdd20200927-12-1vn5scd/cqfn/diKTat/diktat-test-framework/src/main/resources/config.properties is a binary file (0 bytes)
/tmp/0pdd20200927-12-1vn5scd/cqfn/diKTat/info/diktat.jpg is a binary file (98328 bytes)
Reading diktat-common/pom.xml...
Reading diktat-common/src/main/resources/log4j.properties...
Reading diktat-common/src/main/kotlin/org/cqfn/diktat/common/config/rules/RulesConfigReader.kt...
Reading diktat-common/src/main/kotlin/org/cqfn/diktat/common/config/reader/ApplicationProperties.kt...
Reading diktat-common/src/main/kotlin/org/cqfn/diktat/common/config/reader/JsonResourceConfigReader.kt...
Reading diktat-common/src/main/kotlin/org/cqfn/diktat/common/cli/CliArgument.kt...
Reading diktat-common/src/test/resources/test-rules-config.yml...
Reading diktat-common/src/test/kotlin/org/cqfn/diktat/test/ConfigReaderTest.kt...
Reading diktat-analysis.yml...
Reading .git-hooks/pre-commit.sh...
Reading .git-hooks/commit-msg.sh...
Reading LICENSE...
Reading diktat-ruleset/pom.xml...
Reading .gitignore...
Reading README.md...
Reading RELEASING.md...
Reading .gitattributes...
Reading diktat-rules/pom.xml...
Reading diktat-rules/src/main/resources/diktat-analysis.yml...
Reading diktat-rules/src/main/resources/diktat-analysis-huawei.yml...
Reading diktat-rules/src/main/resources/META-INF/services/com.pinterest.ktlint.core.RuleSetProvider...
Reading diktat-rules/src/main/resources/log4j.properties...
Reading diktat-rules/src/main/kotlin/generated/WarningNames.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/SortRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/comments/HeaderCommentRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/comments/CommentsRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/WhenMustHaveElseRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/PackageNaming.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/SingleLineStatementsRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/StringTemplateFormatRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/AnnotationNewLineRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/StringConcatenationRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/BracesInConditionalsAndLoopsRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/WhiteSpaceRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/TypeAliasRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/ConsecutiveSpacesRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/EmptyBlock.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/identifiers/LocalVariablesRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/FileNaming.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/LongNumericalValuesSeparatedRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/calculations/AccurateCalculationsRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/DiktatRuleSetProvider.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/VariableGenericTypeDeclarationRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/ClassLikeStructuresOrderRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/IdentifierNaming.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/LineLength.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/BlockStructureBraces.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/kdoc/KdocFormatting.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/kdoc/CommentsFormatting.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/kdoc/KdocMethods.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/kdoc/KdocComments.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/ImmutableValNoVarRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/MultipleModifiersSequence.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/EnumsSeparated.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/files/IndentationRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/files/FileStructureRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/files/FileSize.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/files/BlankLinesRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/rules/files/NewlinesRule.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/SequenceUtils.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/ASTConstants.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/AstNodeUtils.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/KDocUtils.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/StringCaseUtils.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/VariableSearchASTUtils.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/indentation/Checkers.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/indentation/CustomIndentationChecker.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/indentation/IndentationConfig.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/StringUtils.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/KotlinParser.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/PsiUtils.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/KotlinParseException.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/utils/FunctonASTNodeUtils.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/constants/Warnings.kt...
Reading diktat-rules/src/main/kotlin/org/cqfn/diktat/ruleset/generation/Generation.kt...
Reading diktat-rules/src/test/resources/test/paragraph2/header/MisplacedHeaderKdocNoCopyrightExpected.kt...
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Reading diktat-rules/src/test/resources/test/paragraph2/kdoc/KdocFormattingFullTest.kt...
Reading diktat-rules/src/test/resources/test/paragraph2/kdoc/SpecialTagsInKdocExpected.kt...
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Reading diktat-rules/src/test/resources/test/paragraph2/kdoc/BasicTagsEmptyLinesExpected.kt...
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Reading diktat-rules/src/test/resources/test/paragraph2/kdoc/package/src/main/kotlin/org/cqfn/diktat/kdoc/methods/ParamTagInsertionTested.kt...
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Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/IndentationRuleWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/BracesRuleWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/AnnotationNewLineRuleWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/LongNumericalValuesSeparatedWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/StringConcatenationWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/MultipleModifiersSequenceWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/ConsecutiveSpacesRuleFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/SingleLineStatementsRuleFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/EmptyBlockFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/EnumsSeparatedFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/spaces/WhiteSpaceRuleFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/spaces/WhiteSpaceRuleWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/LineLengthWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/FileSizeWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/AnnotationNewLineRuleFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/ClassLikeStructuresOrderFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/BlockStructureBracesFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/SortRuleFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/LocalVariablesWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/EnumsSeparatedWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/SortRuleWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/StringTemplateRuleWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/files/BlankLinesWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/files/NewlinesRuleWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/files/NewlinesRuleFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/files/BlankLinesFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/BlockStructureBracesWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/MultipleModifiersSequenceFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/FileStructureRuleTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/IndentationRuleFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter3/FileStructureRuleTestFix.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter2/comments/CommentedCodeTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter2/KdocMethodsTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter2/HeaderCommentRuleFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter2/HeaderCommentRuleTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter2/KdocWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter2/KdocFormattingFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter2/KdocFormattingTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter2/KdocParamPresentWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter2/CommentsFormattingFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter2/KdocMethodsFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter2/CommentsFormattingTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter4/NoVarRuleWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter4/TypeAliasRuleWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter4/VariableGenericTypeDeclarationRuleFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter4/AccurateCalculationsWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter4/VariableGenericTypeDeclarationRuleWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter1/EnumValueCaseTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter1/PackageNamingWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter1/MethodNamingWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter1/IdentifierNamingFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter1/PackagePathFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter1/PackageNamingFixTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/chapter1/IdentifierNamingWarnTest.kt...
Reading diktat-rules/src/test/kotlin/org/cqfn/diktat/ruleset/smoke/DiktatSmokeTest.kt...
Reading pom.xml...
Reading .github/pull_request_template.md...
Reading .github/dependabot.yml...
Reading .github/codecov.yml...
Reading .github/workflows/diktat.yml...
Reading .github/workflows/functional_tests.yml...
Reading .github/workflows/diktat_snapshot.yml...
Reading .github/workflows/build_and_test.yml...
Reading .github/workflows/detekt.yml...
Reading .github/workflows/release.yml...
Reading .github/workflows/metrics_for_master.yml...
Reading .github/ISSUE_TEMPLATE/config.yml...
Reading CODE_OF_CONDUCT.md...
Reading diktat-test-framework/pom.xml...
Reading diktat-test-framework/src/main/resources/options.json...
Reading diktat-test-framework/src/main/resources/log4j.properties...
Reading diktat-test-framework/src/main/resources/org/cqfn/diktat/test/framework/test_arguments.json...
Reading diktat-test-framework/src/main/resources/org/cqfn/diktat/test/framework/test_configs/functional/1_9_a_special_space_cases.json...
Reading diktat-test-framework/src/main/resources/org/cqfn/diktat/test/framework/test_configs/functional/1_3_a_package_naming.json...
Reading diktat-test-framework/src/main/resources/org/cqfn/diktat/test/framework/test_configs/functional/1_3_b_package_naming.json...
Reading diktat-test-framework/src/main/resources/org/cqfn/diktat/test/framework/test_framework.properties...
Reading diktat-test-framework/src/main/java/org/cqfn/diktat/test/framework/common/StreamGobbler.java...
Reading diktat-test-framework/src/main/kotlin/org/cqfn/diktat/test/framework/TestEntry.kt...
Reading diktat-test-framework/src/main/kotlin/org/cqfn/diktat/test/framework/processing/TestComparatorUnit.kt...
Reading diktat-test-framework/src/main/kotlin/org/cqfn/diktat/test/framework/processing/TestCheckWarn.kt...
Reading diktat-test-framework/src/main/kotlin/org/cqfn/diktat/test/framework/processing/FileComparator.kt...
Reading diktat-test-framework/src/main/kotlin/org/cqfn/diktat/test/framework/processing/TestCompare.kt...
Reading diktat-test-framework/src/main/kotlin/org/cqfn/diktat/test/framework/processing/TestProcessingFactory.kt...
Reading diktat-test-framework/src/main/kotlin/org/cqfn/diktat/test/framework/processing/TestMixed.kt...
Reading diktat-test-framework/src/main/kotlin/org/cqfn/diktat/test/framework/config/TestConfig.kt...
Reading diktat-test-framework/src/main/kotlin/org/cqfn/diktat/test/framework/config/TestArgumentsReader.kt...
Reading diktat-test-framework/src/main/kotlin/org/cqfn/diktat/test/framework/config/TestFrameworkProperties.kt...
Reading diktat-test-framework/src/main/kotlin/org/cqfn/diktat/test/framework/config/TestConfigReader.kt...
Reading diktat-test-framework/src/main/kotlin/org/cqfn/diktat/test/framework/common/ExecutionResult.kt...
Reading diktat-test-framework/src/main/kotlin/org/cqfn/diktat/test/framework/common/LocalCommandExecutor.kt...
Reading diktat-test-framework/src/main/kotlin/org/cqfn/diktat/test/framework/common/TestBase.kt...
Reading logo.svg...
Reading build.gradle.kts...
Reading info/available-rules.md...
Reading info/diktat-kotlin-coding-style-guide-en.md...
ERROR: info/diktat-kotlin-coding-style-guide-en.md; puzzle at line #353; TODO found, but puzzle can't be parsed, most probably because TODO is not followed by a puzzle marker, as this page explains: https://github.com/yegor256/pdd#how-to-format
If you can't understand the cause of this issue or you don't know how to fix it, please submit a GitHub issue, we will try to help you: https://github.com/yegor256/pdd/issues. This tool is still in its beta version and we will appreciate your feedback. Here is where you can find more documentation: https://github.com/yegor256/pdd/blob/master/README.md.
Exit code is 1

/app/objects/git_repo.rb:66:in `rescue in block in xml'
/app/objects/git_repo.rb:63:in `block in xml'
/app/vendor/ruby-2.6.0/lib/ruby/2.6.0/tempfile.rb:295:in `open'
/app/objects/git_repo.rb:62:in `xml'
/app/objects/puzzles.rb:36:in `deploy'
/app/objects/job.rb:38:in `proceed'
/app/objects/job_starred.rb:33:in `proceed'
/app/objects/job_recorded.rb:32:in `proceed'
/app/objects/job_emailed.rb:35:in `proceed'
/app/objects/job_commiterrors.rb:36:in `proceed'
/app/objects/job_detached.rb:48:in `exclusive'
/app/objects/job_detached.rb:36:in `block in proceed'
/app/objects/job_detached.rb:36:in `fork'
/app/objects/job_detached.rb:36:in `proceed'
/app/0pdd.rb:358:in `block in <top (required)>'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1635:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1635:in `block in compile!'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:992:in `block (3 levels) in route!'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1011:in `route_eval'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:992:in `block (2 levels) in route!'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1040:in `block in process_route'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1038:in `catch'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1038:in `process_route'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:990:in `block in route!'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:989:in `each'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:989:in `route!'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1097:in `block in dispatch!'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1076:in `block in invoke'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1076:in `catch'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1076:in `invoke'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1094:in `dispatch!'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:924:in `block in call!'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1076:in `block in invoke'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1076:in `catch'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1076:in `invoke'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:924:in `call!'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:913:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/rack-protection-2.0.4/lib/rack/protection/xss_header.rb:18:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/rack-protection-2.0.4/lib/rack/protection/path_traversal.rb:16:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/rack-protection-2.0.4/lib/rack/protection/json_csrf.rb:26:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/rack-protection-2.0.4/lib/rack/protection/base.rb:50:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/rack-protection-2.0.4/lib/rack/protection/base.rb:50:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/rack-protection-2.0.4/lib/rack/protection/frame_options.rb:31:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/rack-2.0.6/lib/rack/logger.rb:15:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/rack-2.0.6/lib/rack/common_logger.rb:33:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:231:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:224:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/rack-2.0.6/lib/rack/head.rb:12:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/rack-2.0.6/lib/rack/method_override.rb:22:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:194:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1957:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1502:in `block in call'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1729:in `synchronize'
/app/vendor/bundle/ruby/2.6.0/gems/sinatra-2.0.4/lib/sinatra/base.rb:1502:in `call'
/app/vendor/bundle/ruby/2.6.0/gems/rack-2.0.6/lib/rack/handler/webrick.rb:86:in `service'
/app/vendor/ruby-2.6.0/lib/ruby/2.6.0/webrick/httpserver.rb:140:in `service'
/app/vendor/ruby-2.6.0/lib/ruby/2.6.0/webrick/httpserver.rb:96:in `run'
/app/vendor/ruby-2.6.0/lib/ruby/2.6.0/webrick/server.rb:307:in `block in start_thread'

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