docs(web): show the doc version in the install manifest text (#1077)

The installation page said "the manifest for the latest release"
everywhere, even on older versioned docs and on the unreleased Dev
docs. Show the actual version instead (or "the latest development
snapshot from the main branch" on Dev docs).

The "Testing the latest development snapshot" section now explains,
on Dev docs, that the command above already installs that snapshot,
instead of duplicating it.

Signed-off-by: Danish <danish.khan@enterprisedb.com>

web/docs/installation.mdx

@@ -54,10 +54,9 @@ Both checks are required before proceeding with the installation.
 
 ## Installing the Barman Cloud Plugin
 
-import { InstallationSnippet } from '@site/src/components/Installation';
+import { InstallationSnippet, ManifestVersion } from '@site/src/components/Installation';
 
-Install the plugin using `kubectl` by applying the manifest for the latest
-release:
+Install the plugin using `kubectl` by applying the manifest for <ManifestVersion />:
 
 <InstallationSnippet />
 
@@ -100,10 +99,6 @@ This confirms that the plugin is deployed and ready to use.
 
 ## Testing the latest development snapshot
 
-You can also test the latest development snapshot of the plugin with the
-following command:
+import { DevSnapshotSection } from '@site/src/components/Installation';
 
-```sh
-kubectl apply -f \
-  https://raw.githubusercontent.com/cloudnative-pg/plugin-barman-cloud/refs/heads/main/manifest.yaml
-```
+<DevSnapshotSection />

web/src/components/Installation/index.tsx

@@ -2,6 +2,10 @@ import {ReactElement} from 'react';
 import CodeBlock from '@theme/CodeBlock';
 import {useActiveVersion} from '@docusaurus/plugin-content-docs/client';
 
+// DEV_MANIFEST_URL is the URL of the manifest.yaml on the main branch of the plugin repo.
+const DEV_MANIFEST_URL =
+    'https://raw.githubusercontent.com/cloudnative-pg/plugin-barman-cloud/refs/heads/main/manifest.yaml';
+
 // InstallationSnippet is the kubectl incantation to install the Barman
 // Cloud Plugin: the manifest matching the doc version being viewed, or
 // (on the unreleased "current" docs) the latest manifest on main.
@@ -9,7 +13,7 @@ export function InstallationSnippet(): ReactElement<null> {
     const activeVersion = useActiveVersion('default');
     const url = activeVersion && activeVersion.name !== 'current'
         ? `https://github.com/cloudnative-pg/plugin-barman-cloud/releases/download/v${activeVersion.name}/manifest.yaml`
-        : 'https://raw.githubusercontent.com/cloudnative-pg/plugin-barman-cloud/refs/heads/main/manifest.yaml';
+        : DEV_MANIFEST_URL;
     return (
         <CodeBlock language="sh">
             {`kubectl apply -f \\
@@ -17,3 +21,35 @@ export function InstallationSnippet(): ReactElement<null> {
         </CodeBlock>
     );
 }
+
+// ManifestVersion names the manifest the snippet below installs: the
+// release tag for a versioned docs page, or the main branch on Dev docs.
+export function ManifestVersion(): ReactElement<null> {
+    const activeVersion = useActiveVersion('default');
+    return activeVersion && activeVersion.name !== 'current'
+        ? <code>v{activeVersion.name}</code>
+        : <>the latest development snapshot from the <code>main</code> branch</>;
+}
+
+// DevSnapshotSection offers the main-branch manifest as an alternative;
+// on the Dev docs the main install already is that manifest, so hide it.
+export function DevSnapshotSection(): ReactElement {
+    const activeVersion = useActiveVersion('default');
+    if (!activeVersion || activeVersion.name === 'current') {
+        return (
+            <p>The <a href="#installing-the-barman-cloud-plugin">install
+                command above</a> already applies the latest development
+                snapshot from the <code>main</code> branch.</p>
+        );
+    }
+    return (
+        <>
+            <p>You can also test the latest development snapshot of the plugin
+                with the following command:</p>
+            <CodeBlock language="sh">
+                {`kubectl apply -f \\
+        ${DEV_MANIFEST_URL}`}
+            </CodeBlock>
+        </>
+    );
+}

web/versioned_docs/version-0.13.0/installation.mdx

@@ -54,10 +54,9 @@ Both checks are required before proceeding with the installation.
 
 ## Installing the Barman Cloud Plugin
 
-import { InstallationSnippet } from '@site/src/components/Installation';
+import { InstallationSnippet, ManifestVersion } from '@site/src/components/Installation';
 
-Install the plugin using `kubectl` by applying the manifest for the latest
-release:
+Install the plugin using `kubectl` by applying the manifest for <ManifestVersion />:
 
 <InstallationSnippet />
 
@@ -100,10 +99,6 @@ This confirms that the plugin is deployed and ready to use.
 
 ## Testing the latest development snapshot
 
-You can also test the latest development snapshot of the plugin with the
-following command:
+import { DevSnapshotSection } from '@site/src/components/Installation';
 
-```sh
-kubectl apply -f \
-  https://raw.githubusercontent.com/cloudnative-pg/plugin-barman-cloud/refs/heads/main/manifest.yaml
-```
+<DevSnapshotSection />

web/versioned_docs/version-0.14.0/installation.mdx

@@ -54,10 +54,9 @@ Both checks are required before proceeding with the installation.
 
 ## Installing the Barman Cloud Plugin
 
-import { InstallationSnippet } from '@site/src/components/Installation';
+import { InstallationSnippet, ManifestVersion } from '@site/src/components/Installation';
 
-Install the plugin using `kubectl` by applying the manifest for the latest
-release:
+Install the plugin using `kubectl` by applying the manifest for <ManifestVersion />:
 
 <InstallationSnippet />
 
@@ -100,10 +99,6 @@ This confirms that the plugin is deployed and ready to use.
 
 ## Testing the latest development snapshot
 
-You can also test the latest development snapshot of the plugin with the
-following command:
+import { DevSnapshotSection } from '@site/src/components/Installation';
 
-```sh
-kubectl apply -f \
-  https://raw.githubusercontent.com/cloudnative-pg/plugin-barman-cloud/refs/heads/main/manifest.yaml
-```
+<DevSnapshotSection />