Move section on private Maven repos

* Update links from different sections to the new shared instructions

doc/user/application_security/dependency_scanning/index.md

@@ -167,7 +167,7 @@ The following variables are used for configuring specific analyzers (used for a
 | `DS_PIP_VERSION`                        | `gemnasium-python` |                              | Force the install of a specific pip version (example: `"19.3"`), otherwise the pip installed in the Docker image is used. ([Introduced](https://gitlab.com/gitlab-org/gitlab/issues/12811) in GitLab 12.7) |
 | `DS_PIP_DEPENDENCY_PATH`                | `gemnasium-python` |                              | Path to load Python pip dependencies from. ([Introduced](https://gitlab.com/gitlab-org/gitlab/issues/12412) in GitLab 12.2) |
 | `DS_PYTHON_VERSION`                     | `retire.js`        |                              | Version of Python. If set to 2, dependencies are installed using Python 2.7 instead of Python 3.6. ([Introduced](https://gitlab.com/gitlab-org/gitlab/issues/12296) in GitLab 12.1)|
-| `MAVEN_CLI_OPTS`                        | `gemnasium-maven`  | `"-DskipTests --batch-mode"` | List of command line arguments that will be passed to `maven` by the analyzer. See an example for [using private repos](#using-private-maven-repos). |
+| `MAVEN_CLI_OPTS`                        | `gemnasium-maven`  | `"-DskipTests --batch-mode"` | List of command line arguments that will be passed to `maven` by the analyzer. See an example for [using private repos](../index.md#using-private-maven-repos). |
 | `BUNDLER_AUDIT_UPDATE_DISABLED`         | `bundler-audit`    | `"false"`                      | Disable automatic updates for the `bundler-audit` analyzer. Useful if you're running Dependency Scanning in an offline, air-gapped environment.|
 | `BUNDLER_AUDIT_ADVISORY_DB_URL`         | `bundler-audit`    | `https://github.com/rubysec/ruby-advisory-db` | URL of the advisory database used by bundler-audit. |
 | `BUNDLER_AUDIT_ADVISORY_DB_REF_NAME`    | `bundler-audit`    | `master`                     | Git ref for the advisory database specified by `BUNDLER_AUDIT_ADVISORY_DB_URL`. |
@@ -177,28 +177,9 @@ The following variables are used for configuring specific analyzers (used for a
 ### Using private Maven repos
 
 If you have a private Maven repository which requires login credentials,
-you can use the `MAVEN_CLI_OPTS` environment variable to pass variables
-specified in your settings (e.g., username, password, etc.).
-
-For example, if you have a settings file in your project source (e.g., `mysettings.xml`)
-that looks like the following, you can specify the variables
-[by adding an entry under your project's settings](../../../ci/variables/README.md#via-the-ui),
-so that you don't have to expose your private data in `.gitlab-ci.yml` (e.g., adding
-`MAVEN_CLI_OPTS` with value `--settings mysettings.xml -Dprivate.username=foo -Dprivate.password=bar`).
-
-```xml
-<!-- mysettings.xml -->
-<settings>
-    ...
-    <servers>
-        <server>
-            <id>private_server</id>
-            <username>${private.username}</username>
-            <password>${private.password}</password>
-        </server>
-    </servers>
-</settings>
-```
+you can use the `MAVEN_CLI_OPTS` environment variable.
+
+Read more on [how to use private Maven repos](../index.md#using-private-maven-repos).
 
 ### Disabling Docker in Docker for Dependency Scanning
 

doc/user/application_security/index.md

@@ -251,6 +251,35 @@ environment.
 
 Read how to [operate the Secure scanners in an offline environment](offline_deployments/index.md).
 
+## Using private Maven repos
+
+If you have a private Apache Maven repository that requires login credentials,
+you can use the `MAVEN_CLI_OPTS` environment variable
+to pass a username and password. You can set it under your project's settings
+so that your credentials aren't exposed in `.gitlab-ci.yml`.
+
+If the username is `myuser` and the password is `verysecret` then you would
+[set the following variable](../../ci/variables/README.md#via-the-ui)
+under your project's settings:
+
+| Type | Key | Value |
+| ---- | --- | ----- |
+| Variable | `MAVEN_CLI_OPTS` | `--settings mysettings.xml -Drepository.password=verysecret -Drepository.user=myuser` |
+
+```xml
+<!-- mysettings.xml -->
+<settings>
+    ...
+    <servers>
+        <server>
+            <id>private_server</id>
+            <username>${private.username}</username>
+            <password>${private.password}</password>
+        </server>
+    </servers>
+</settings>
+```
+
 ## Outdated security reports
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab/issues/4913) in GitLab 12.7.

doc/user/application_security/sast/index.md

@@ -166,18 +166,10 @@ it via [custom environment variables](#custom-environment-variables).
 
 #### Using a variable to pass username and password to a private Maven repository
 
-If you have a private Apache Maven repository that requires login credentials,
-you can use the `MAVEN_CLI_OPTS` [environment variable](#available-variables)
-to pass a username and password. You can set it under your project's settings
-so that your credentials aren't exposed in `.gitlab-ci.yml`.
-
-If the username is `myuser` and the password is `verysecret` then you would
-[set the following variable](../../../ci/variables/README.md#via-the-ui)
-under your project's settings:
-
-| Type | Key | Value |
-| ---- | --- | ----- |
-| Variable | `MAVEN_CLI_OPTS` | `-Drepository.password=verysecret -Drepository.user=myuser` |
+If you have a private Maven repository which requires login credentials,
+you can use the `MAVEN_CLI_OPTS` environment variable.
+
+Read more on [how to use private Maven repos](../index.md#using-private-maven-repos).
 
 ### Disabling Docker in Docker for SAST
 

doc/user/compliance/license_compliance/index.md

@@ -191,35 +191,10 @@ If you still need to run tests during `mvn install`, add `-DskipTests=false` to
 
 #### Using private Maven repos
 
-If you have a private Maven repository that requires login credentials, you can use the
-`MAVEN_CLI_OPTS` variable to specify a custom [`settings.xml`](http://maven.apache.org/settings.html)
-file.
-
-For example, you may have a settings file like this in your project source:
-
-```xml
-<settings>
-  <servers>
-    <server>
-      <id>my-server</id>
-      <username>${private.username}</username>
-      <username>${private.password}</username>
-    </server>
-  </servers>
-</settings>
-```
-
-You can use this file through the following declaration in your `gitlab-ci.yml` file:
-
-```yaml
-license_scanning:
-  variables:
-    MAVEN_CLI_OPTS: --settings settings.xml -Dprivate.username=foo -Dprivate.password=bar
-```
+If you have a private Maven repository which requires login credentials,
+you can use the `MAVEN_CLI_OPTS` environment variable.
 
-NOTE: **Note:**
-If you don't want to expose the credentials in your `.gitlab-ci.yml` file, then
-you can [set the variable in your project's settings](../../../ci/variables/README.md#via-the-ui).
+Read more on [how to use private Maven repos](../../application_security/index.md#using-private-maven-repos).
 
 ### Selecting the version of Python