From 92fcee2f4b175fe876c01620c9ae0d0222e8c6cf Mon Sep 17 00:00:00 2001 From: buildmaster Date: Tue, 5 Feb 2019 08:54:09 +0000 Subject: [PATCH] Sync docs from master to gh-pages --- multi/multi__building_and_deploying.html | 2 +- multi/multi__checkstyle.html | 54 +++++++++ multi/multi__contributing.html | 10 +- multi/multi__reusing_the_documentation.html | 10 +- multi/multi_spring-cloud-build.html | 2 +- single/spring-cloud-build.html | 71 ++++++++++-- spring-cloud-build.xml | 118 +++++++++++++++++++- 7 files changed, 239 insertions(+), 28 deletions(-) create mode 100644 multi/multi__checkstyle.html diff --git a/multi/multi__building_and_deploying.html b/multi/multi__building_and_deploying.html index f8fea600..0053df03 100644 --- a/multi/multi__building_and_deploying.html +++ b/multi/multi__building_and_deploying.html @@ -1,3 +1,3 @@ - 1. Building and Deploying

1. Building and Deploying

To install locally:

$ mvn install -s .settings.xml

and to deploy snapshots to repo.spring.io:

$ mvn deploy -DaltSnapshotDeploymentRepository=repo.spring.io::default::https://repo.spring.io/libs-snapshot-local

for a RELEASE build use

$ mvn deploy -DaltReleaseDeploymentRepository=repo.spring.io::default::https://repo.spring.io/libs-release-local

and for jcenter use

$ mvn deploy -DaltReleaseDeploymentRepository=bintray::default::https://api.bintray.com/maven/spring/jars/org.springframework.cloud:build

and for Maven Central use

$ mvn deploy -P central -DaltReleaseDeploymentRepository=sonatype-nexus-staging::default::https://oss.sonatype.org/service/local/staging/deploy/maven2

(the "central" profile is available for all projects in Spring Cloud and it sets up the gpg jar signing, and the repository has to be specified separately for this project because it is a parent of the starter parent which users in turn have as their own parent).

\ No newline at end of file + 1. Building and Deploying

1. Building and Deploying

To install locally:

$ mvn install -s .settings.xml

and to deploy snapshots to repo.spring.io:

$ mvn deploy -DaltSnapshotDeploymentRepository=repo.spring.io::default::https://repo.spring.io/libs-snapshot-local

for a RELEASE build use

$ mvn deploy -DaltReleaseDeploymentRepository=repo.spring.io::default::https://repo.spring.io/libs-release-local

and for jcenter use

$ mvn deploy -DaltReleaseDeploymentRepository=bintray::default::https://api.bintray.com/maven/spring/jars/org.springframework.cloud:build

and for Maven Central use

$ mvn deploy -P central -DaltReleaseDeploymentRepository=sonatype-nexus-staging::default::https://oss.sonatype.org/service/local/staging/deploy/maven2

(the "central" profile is available for all projects in Spring Cloud and it sets up the gpg jar signing, and the repository has to be specified separately for this project because it is a parent of the starter parent which users in turn have as their own parent).

\ No newline at end of file diff --git a/multi/multi__checkstyle.html b/multi/multi__checkstyle.html new file mode 100644 index 00000000..4c8a2dde --- /dev/null +++ b/multi/multi__checkstyle.html @@ -0,0 +1,54 @@ + + + 2. Checkstyle

2. Checkstyle

Spring Cloud Build comes with a set of checkstyle rules. You can find them in the spring-cloud-build-tools module. The most notable files under the module are:

spring-cloud-build-tools/.  +

└── src
+    ├── checkstyle
+    │   └── checkstyle-suppressions.xml 1
+    └── main
+        └── resources
+            ├── checkstyle-header.txt 2
+            ├── checkstyle.xml 3
+            └── intellij
+                ├── Intellij_Project_Defaults.xml 4
+                └── Intellij_Spring_Boot_Java_Conventions.xml 5

+

3

Default Checkstyle rules

2

File header setup

1

Default suppression rules

4

Project defaults for Intellij that apply most of Checkstyle rules

5

Project style conventions for Intellij that apply most of Checkstyle rules

2.1 Checkstyle configuration

Checkstyle rules are disabled by deafult. To add checkstyle to your project just define the following properties and plugins.

pom.xml.  +

<properties>
+<maven-checkstyle-plugin.failsOnError>true</maven-checkstyle-plugin.failsOnError> 1
+        <maven-checkstyle-plugin.failsOnViolation>true
+        </maven-checkstyle-plugin.failsOnViolation> 2
+        <maven-checkstyle-plugin.includeTestSourceDirectory>true
+        </maven-checkstyle-plugin.includeTestSourceDirectory> 3
+</properties>
+
+<build>
+        <plugins>
+            <plugin> 4
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+            </plugin>
+            <plugin> 5
+                <groupId>io.spring.javaformat</groupId>
+                <artifactId>spring-javaformat-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+    <reporting>
+        <plugins>
+            <plugin> 6
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </reporting>
+</build>

+

1

Fails the build upon Checkstyle errors

2

Fails the build upon Checkstyle violations

3

Checkstyle analyzes also the test sources

4 6

Add checkstyle plugin to your build and reporting phases

5

Add the Spring Java Format plugin that will reformat your code to pass most of the Checkstyle formatting rules

If you need to suppress some rules (e.g. line length needs to be longer), then it’s enough for you to define a file under ${project.root}/src/checkstyle/checkstyle-suppressions.xml with your suppressions. Example:

projectRoot/src/checkstyle/checkstyle-suppresions.xml.  +

<?xml version="1.0"?>
+<!DOCTYPE suppressions PUBLIC
+		"-//Puppy Crawl//DTD Suppressions 1.1//EN"
+		"http://www.puppycrawl.com/dtds/suppressions_1_1.dtd">
+<suppressions>
+	<suppress files=".*ConfigServerApplication\.java" checks="HideUtilityClassConstructor"/>
+	<suppress files=".*ConfigClientWatch\.java" checks="LineLengthCheck"/>
+</suppressions>

+

\ No newline at end of file diff --git a/multi/multi__contributing.html b/multi/multi__contributing.html index 81bd2560..ef054ad4 100644 --- a/multi/multi__contributing.html +++ b/multi/multi__contributing.html @@ -1,17 +1,17 @@ - 2. Contributing

2. Contributing

Spring Cloud is released under the non-restrictive Apache 2.0 license, + 3. Contributing

3. Contributing

Spring Cloud is released under the non-restrictive Apache 2.0 license, and follows a very standard Github development process, using Github tracker for issues and merging pull requests into master. If you want to contribute even something trivial please do not hesitate, but -follow the guidelines below.

2.1 Sign the Contributor License Agreement

Before we accept a non-trivial patch or pull request we will need you to sign the +follow the guidelines below.

3.1 Sign the Contributor License Agreement

Before we accept a non-trivial patch or pull request we will need you to sign the Contributor License Agreement. Signing the contributor’s agreement does not grant anyone commit rights to the main repository, but it does mean that we can accept your contributions, and you will get an author credit if we do. Active contributors might be asked to join the core team, and -given the ability to merge pull requests.

2.2 Code of Conduct

This project adheres to the Contributor Covenant code of +given the ability to merge pull requests.

3.2 Code of Conduct

This project adheres to the Contributor Covenant code of conduct. By participating, you are expected to uphold this code. Please report -unacceptable behavior to spring-code-of-conduct@pivotal.io.

2.3 Code Conventions and Housekeeping

None of these is essential for a pull request, but they will all help. They can also be +unacceptable behavior to spring-code-of-conduct@pivotal.io.

3.3 Code Conventions and Housekeeping

None of these is essential for a pull request, but they will all help. They can also be added after the original pull request but before a merge.

  • Use the Spring Framework code format conventions. If you use Eclipse you can import formatter settings using the eclipse-code-formatter.xml file from the @@ -25,4 +25,4 @@ in the project)
  • Add yourself as an Add some Javadocs and, if you change the namespace, some XSD doc elements.
  • A few unit tests would help a lot as well — someone has to do it.
  • If no-one else is using your branch, please rebase it against the current master (or other target branch in the main project).
  • When writing a commit message please follow these conventions, if you are fixing an existing issue please add Fixes gh-XXXX at the end of the commit -message (where XXXX is the issue number).
\ No newline at end of file +message (where XXXX is the issue number).
\ No newline at end of file diff --git a/multi/multi__reusing_the_documentation.html b/multi/multi__reusing_the_documentation.html index 5f05ba1f..30da1414 100644 --- a/multi/multi__reusing_the_documentation.html +++ b/multi/multi__reusing_the_documentation.html @@ -1,6 +1,6 @@ - 3. Reusing the documentation

3. Reusing the documentation

Spring Cloud Build publishes its spring-cloud-build-docs module that contains + 4. Reusing the documentation

4. Reusing the documentation

Spring Cloud Build publishes its spring-cloud-build-docs module that contains helpful scripts (e.g. README generation ruby script) and css, xslt and images for the Spring Cloud documentation. If you want to follow the same convention approach of generating documentation just add these plugins to your docs module

<profiles>
@@ -10,18 +10,18 @@ approach of generating documentation just add these plugins to your <plugins>
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
-						<artifactId>maven-dependency-plugin</artifactId> 1
+						<artifactId>maven-dependency-plugin</artifactId> 1
 					</plugin>
 					<plugin>
 						<groupId>org.asciidoctor</groupId>
-						<artifactId>asciidoctor-maven-plugin</artifactId> 2
+						<artifactId>asciidoctor-maven-plugin</artifactId> 2
 					</plugin>
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
-						<artifactId>maven-antrun-plugin</artifactId> 3
+						<artifactId>maven-antrun-plugin</artifactId> 3
 						<inherited>false</inherited>
 					</plugin>
 				</plugins>
 			</build>
 		</profile>
-	</profiles>

1

This plugin downloads and unpacks the resources of the spring-cloud-build-docs module

2

This plugin is required to parse the Asciidoctor documentation

3

This plugin is required to copy resources into proper final destinations and to generate main README.adoc

[Important]Important

The order of plugin declaration is important!

\ No newline at end of file + </profiles>

1

This plugin downloads and unpacks the resources of the spring-cloud-build-docs module

2

This plugin is required to parse the Asciidoctor documentation

3

This plugin is required to copy resources into proper final destinations and to generate main README.adoc

[Important]Important

The order of plugin declaration is important!

\ No newline at end of file diff --git a/multi/multi_spring-cloud-build.html b/multi/multi_spring-cloud-build.html index 55a00c97..94abc31e 100644 --- a/multi/multi_spring-cloud-build.html +++ b/multi/multi_spring-cloud-build.html @@ -1,3 +1,3 @@ - Spring Cloud Build \ No newline at end of file + Spring Cloud Build \ No newline at end of file diff --git a/single/spring-cloud-build.html b/single/spring-cloud-build.html index 974fb662..d6da4838 100644 --- a/single/spring-cloud-build.html +++ b/single/spring-cloud-build.html @@ -1,18 +1,69 @@ - Spring Cloud Build

Spring Cloud Build


Spring Cloud Build is a common utility project for Spring Cloud -to use for plugin and dependency management.

1. Building and Deploying

To install locally:

$ mvn install -s .settings.xml

and to deploy snapshots to repo.spring.io:

$ mvn deploy -DaltSnapshotDeploymentRepository=repo.spring.io::default::https://repo.spring.io/libs-snapshot-local

for a RELEASE build use

$ mvn deploy -DaltReleaseDeploymentRepository=repo.spring.io::default::https://repo.spring.io/libs-release-local

and for jcenter use

$ mvn deploy -DaltReleaseDeploymentRepository=bintray::default::https://api.bintray.com/maven/spring/jars/org.springframework.cloud:build

and for Maven Central use

$ mvn deploy -P central -DaltReleaseDeploymentRepository=sonatype-nexus-staging::default::https://oss.sonatype.org/service/local/staging/deploy/maven2

(the "central" profile is available for all projects in Spring Cloud and it sets up the gpg jar signing, and the repository has to be specified separately for this project because it is a parent of the starter parent which users in turn have as their own parent).

2. Contributing

Spring Cloud is released under the non-restrictive Apache 2.0 license, + Spring Cloud Build

Spring Cloud Build


Spring Cloud Build is a common utility project for Spring Cloud +to use for plugin and dependency management.

1. Building and Deploying

To install locally:

$ mvn install -s .settings.xml

and to deploy snapshots to repo.spring.io:

$ mvn deploy -DaltSnapshotDeploymentRepository=repo.spring.io::default::https://repo.spring.io/libs-snapshot-local

for a RELEASE build use

$ mvn deploy -DaltReleaseDeploymentRepository=repo.spring.io::default::https://repo.spring.io/libs-release-local

and for jcenter use

$ mvn deploy -DaltReleaseDeploymentRepository=bintray::default::https://api.bintray.com/maven/spring/jars/org.springframework.cloud:build

and for Maven Central use

$ mvn deploy -P central -DaltReleaseDeploymentRepository=sonatype-nexus-staging::default::https://oss.sonatype.org/service/local/staging/deploy/maven2

(the "central" profile is available for all projects in Spring Cloud and it sets up the gpg jar signing, and the repository has to be specified separately for this project because it is a parent of the starter parent which users in turn have as their own parent).

2. Checkstyle

Spring Cloud Build comes with a set of checkstyle rules. You can find them in the spring-cloud-build-tools module. The most notable files under the module are:

spring-cloud-build-tools/.  +

└── src
+    ├── checkstyle
+    │   └── checkstyle-suppressions.xml 1
+    └── main
+        └── resources
+            ├── checkstyle-header.txt 2
+            ├── checkstyle.xml 3
+            └── intellij
+                ├── Intellij_Project_Defaults.xml 4
+                └── Intellij_Spring_Boot_Java_Conventions.xml 5

+

3

Default Checkstyle rules

2

File header setup

1

Default suppression rules

4

Project defaults for Intellij that apply most of Checkstyle rules

5

Project style conventions for Intellij that apply most of Checkstyle rules

2.1 Checkstyle configuration

Checkstyle rules are disabled by deafult. To add checkstyle to your project just define the following properties and plugins.

pom.xml.  +

<properties>
+<maven-checkstyle-plugin.failsOnError>true</maven-checkstyle-plugin.failsOnError> 1
+        <maven-checkstyle-plugin.failsOnViolation>true
+        </maven-checkstyle-plugin.failsOnViolation> 2
+        <maven-checkstyle-plugin.includeTestSourceDirectory>true
+        </maven-checkstyle-plugin.includeTestSourceDirectory> 3
+</properties>
+
+<build>
+        <plugins>
+            <plugin> 4
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+            </plugin>
+            <plugin> 5
+                <groupId>io.spring.javaformat</groupId>
+                <artifactId>spring-javaformat-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+    <reporting>
+        <plugins>
+            <plugin> 6
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </reporting>
+</build>

+

1

Fails the build upon Checkstyle errors

2

Fails the build upon Checkstyle violations

3

Checkstyle analyzes also the test sources

4 6

Add checkstyle plugin to your build and reporting phases

5

Add the Spring Java Format plugin that will reformat your code to pass most of the Checkstyle formatting rules

If you need to suppress some rules (e.g. line length needs to be longer), then it’s enough for you to define a file under ${project.root}/src/checkstyle/checkstyle-suppressions.xml with your suppressions. Example:

projectRoot/src/checkstyle/checkstyle-suppresions.xml.  +

<?xml version="1.0"?>
+<!DOCTYPE suppressions PUBLIC
+		"-//Puppy Crawl//DTD Suppressions 1.1//EN"
+		"http://www.puppycrawl.com/dtds/suppressions_1_1.dtd">
+<suppressions>
+	<suppress files=".*ConfigServerApplication\.java" checks="HideUtilityClassConstructor"/>
+	<suppress files=".*ConfigClientWatch\.java" checks="LineLengthCheck"/>
+</suppressions>

+

3. Contributing

Spring Cloud is released under the non-restrictive Apache 2.0 license, and follows a very standard Github development process, using Github tracker for issues and merging pull requests into master. If you want to contribute even something trivial please do not hesitate, but -follow the guidelines below.

2.1 Sign the Contributor License Agreement

Before we accept a non-trivial patch or pull request we will need you to sign the +follow the guidelines below.

3.1 Sign the Contributor License Agreement

Before we accept a non-trivial patch or pull request we will need you to sign the Contributor License Agreement. Signing the contributor’s agreement does not grant anyone commit rights to the main repository, but it does mean that we can accept your contributions, and you will get an author credit if we do. Active contributors might be asked to join the core team, and -given the ability to merge pull requests.

2.2 Code of Conduct

This project adheres to the Contributor Covenant code of +given the ability to merge pull requests.

3.2 Code of Conduct

This project adheres to the Contributor Covenant code of conduct. By participating, you are expected to uphold this code. Please report -unacceptable behavior to spring-code-of-conduct@pivotal.io.

2.3 Code Conventions and Housekeeping

None of these is essential for a pull request, but they will all help. They can also be +unacceptable behavior to spring-code-of-conduct@pivotal.io.

3.3 Code Conventions and Housekeeping

None of these is essential for a pull request, but they will all help. They can also be added after the original pull request but before a merge.

  • Use the Spring Framework code format conventions. If you use Eclipse you can import formatter settings using the eclipse-code-formatter.xml file from the @@ -26,7 +77,7 @@ in the project)
  • Add yourself as an Add some Javadocs and, if you change the namespace, some XSD doc elements.
  • A few unit tests would help a lot as well — someone has to do it.
  • If no-one else is using your branch, please rebase it against the current master (or other target branch in the main project).
  • When writing a commit message please follow these conventions, if you are fixing an existing issue please add Fixes gh-XXXX at the end of the commit -message (where XXXX is the issue number).

3. Reusing the documentation

Spring Cloud Build publishes its spring-cloud-build-docs module that contains +message (where XXXX is the issue number).

4. Reusing the documentation

Spring Cloud Build publishes its spring-cloud-build-docs module that contains helpful scripts (e.g. README generation ruby script) and css, xslt and images for the Spring Cloud documentation. If you want to follow the same convention approach of generating documentation just add these plugins to your docs module

<profiles>
@@ -36,18 +87,18 @@ approach of generating documentation just add these plugins to your <plugins>
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
-						<artifactId>maven-dependency-plugin</artifactId> 1
+						<artifactId>maven-dependency-plugin</artifactId> 1
 					</plugin>
 					<plugin>
 						<groupId>org.asciidoctor</groupId>
-						<artifactId>asciidoctor-maven-plugin</artifactId> 2
+						<artifactId>asciidoctor-maven-plugin</artifactId> 2
 					</plugin>
 					<plugin>
 						<groupId>org.apache.maven.plugins</groupId>
-						<artifactId>maven-antrun-plugin</artifactId> 3
+						<artifactId>maven-antrun-plugin</artifactId> 3
 						<inherited>false</inherited>
 					</plugin>
 				</plugins>
 			</build>
 		</profile>
-	</profiles>

1

This plugin downloads and unpacks the resources of the spring-cloud-build-docs module

2

This plugin is required to parse the Asciidoctor documentation

3

This plugin is required to copy resources into proper final destinations and to generate main README.adoc

[Important]Important

The order of plugin declaration is important!

\ No newline at end of file + </profiles>

1

This plugin downloads and unpacks the resources of the spring-cloud-build-docs module

2

This plugin is required to parse the Asciidoctor documentation

3

This plugin is required to copy resources into proper final destinations and to generate main README.adoc

[Important]Important

The order of plugin declaration is important!

\ No newline at end of file diff --git a/spring-cloud-build.xml b/spring-cloud-build.xml index bc67edee..cc74a26c 100644 --- a/spring-cloud-build.xml +++ b/spring-cloud-build.xml @@ -31,6 +31,112 @@ to use for plugin and dependency management. $ mvn deploy -P central -DaltReleaseDeploymentRepository=sonatype-nexus-staging::default::https://oss.sonatype.org/service/local/staging/deploy/maven2 (the "central" profile is available for all projects in Spring Cloud and it sets up the gpg jar signing, and the repository has to be specified separately for this project because it is a parent of the starter parent which users in turn have as their own parent). + +Checkstyle +Spring Cloud Build comes with a set of checkstyle rules. You can find them in the spring-cloud-build-tools module. The most notable files under the module are: + +spring-cloud-build-tools/ + +└── src +    ├── checkstyle +    │   └── checkstyle-suppressions.xml +    └── main +    └── resources +    ├── checkstyle-header.txt +    ├── checkstyle.xml +    └── intellij +       ├── Intellij_Project_Defaults.xml +       └── Intellij_Spring_Boot_Java_Conventions.xml + + + + +Default Checkstyle rules + + +File header setup + + +Default suppression rules + + +Project defaults for Intellij that apply most of Checkstyle rules + + +Project style conventions for Intellij that apply most of Checkstyle rules + + +
+Checkstyle configuration +Checkstyle rules are disabled by deafult. To add checkstyle to your project just define the following properties and plugins. + +pom.xml + +<properties> +<maven-checkstyle-plugin.failsOnError>true</maven-checkstyle-plugin.failsOnError> + <maven-checkstyle-plugin.failsOnViolation>true + </maven-checkstyle-plugin.failsOnViolation> + <maven-checkstyle-plugin.includeTestSourceDirectory>true + </maven-checkstyle-plugin.includeTestSourceDirectory> +</properties> + +<build> + <plugins> + <plugin> + <groupId>org.apache.maven.plugins</groupId> + <artifactId>maven-checkstyle-plugin</artifactId> + </plugin> + <plugin> + <groupId>io.spring.javaformat</groupId> + <artifactId>spring-javaformat-maven-plugin</artifactId> + </plugin> + </plugins> + </build> + + <reporting> + <plugins> + <plugin> + <groupId>org.apache.maven.plugins</groupId> + <artifactId>maven-checkstyle-plugin</artifactId> + </plugin> + </plugins> + </reporting> +</build> + + + + +Fails the build upon Checkstyle errors + + +Fails the build upon Checkstyle violations + + +Checkstyle analyzes also the test sources + + +Add checkstyle plugin to your build and reporting phases + + +Add the Spring Java Format plugin that will reformat your code to pass most of the Checkstyle formatting rules + + +If you need to suppress some rules (e.g. line length needs to be longer), then it’s enough for you to define a file under ${project.root}/src/checkstyle/checkstyle-suppressions.xml with your suppressions. Example: + +projectRoot/src/checkstyle/checkstyle-suppresions.xml + +<?xml version="1.0"?> +<!DOCTYPE suppressions PUBLIC + "-//Puppy Crawl//DTD Suppressions 1.1//EN" + "http://www.puppycrawl.com/dtds/suppressions_1_1.dtd"> +<suppressions> + <suppress files=".*ConfigServerApplication\.java" checks="HideUtilityClassConstructor"/> + <suppress files=".*ConfigClientWatch\.java" checks="LineLengthCheck"/> +</suppressions> + + +
+
Contributing Spring Cloud is released under the non-restrictive Apache 2.0 license, @@ -111,15 +217,15 @@ approach of generating documentation just add these plugins to your doc <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> - <artifactId>maven-dependency-plugin</artifactId> + <artifactId>maven-dependency-plugin</artifactId> </plugin> <plugin> <groupId>org.asciidoctor</groupId> - <artifactId>asciidoctor-maven-plugin</artifactId> + <artifactId>asciidoctor-maven-plugin</artifactId> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> - <artifactId>maven-antrun-plugin</artifactId> + <artifactId>maven-antrun-plugin</artifactId> <inherited>false</inherited> </plugin> </plugins> @@ -127,13 +233,13 @@ approach of generating documentation just add these plugins to your doc </profile> </profiles> - + This plugin downloads and unpacks the resources of the spring-cloud-build-docs module - + This plugin is required to parse the Asciidoctor documentation - + This plugin is required to copy resources into proper final destinations and to generate main README.adoc