[PATCH 8/8] tools/build-docs-container: make it possible to print the distro list

[Antonin Godard <antonin.godard@bootlin.com>]

Add a special "supported_distros" argument to the script to make it
possible to return the list of supported distros. This is useful for use
in a external script, to run the docs build on a specific set or all
supported distros concurrently.

Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
---
 documentation/tools/build-docs-container | 49 +++++++++++++++++++++-----------
 1 file changed, 32 insertions(+), 17 deletions(-)

diff --git a/documentation/tools/build-docs-container b/documentation/tools/build-docs-container
index c5cdd9c4c..510435c3c 100755
--- a/documentation/tools/build-docs-container
+++ b/documentation/tools/build-docs-container
@@ -20,6 +20,32 @@
 
 set -eu -o pipefail
 
+declare -a _SUPPORTED_DISTROS=(
+  almalinux:8
+  almalinux:9
+  centos:stream9
+  debian:12
+  debian:13
+  fedora:39
+  fedora:40
+  fedora:41
+  fedora:42
+  leap:15.5
+  leap:15.6
+  rockylinux:8
+  rockylinux:9
+  ubuntu:22.04
+  ubuntu:24.04
+  ubuntu:25.04
+  ubuntu:25.10
+)
+
+
+if [ "${1:-}" = "supported_distros" ]; then
+  echo "${_SUPPORTED_DISTROS[@]}"
+  exit 0
+fi
+
 SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null && pwd)
 CONTAINERCMD=${CONTAINERCMD:-docker}
 DOCS_DIR="$SCRIPT_DIR/../.."
@@ -35,24 +61,13 @@ $0 OCI_IMAGE [make arguments...]
 
    OCI_IMAGE is an image:tag of an OCI image hosted on hub.docker.com. It is one
    of:
-     - almalinux:8
-     - almalinux:9
-     - centos:stream9
-     - debian:12
-     - debian:13
-     - fedora:39
-     - fedora:40
-     - fedora:41
-     - fedora:42
-     - leap:15.5
-     - leap:15.6
-     - rockylinux:8
-     - rockylinux:9
-     - ubuntu:22.04
-     - ubuntu:24.04
-     - ubuntu:25.04
-     - ubuntu:25.10
+"
+
+  for distro in "${_SUPPORTED_DISTROS[@]}"; do
+    echo "   - $distro"
+  done
 
+  echo "
    [make arguments] is one or more argument to pass to the make command of
    documentation/Makefile, see that file for what's supported. This is typically
    intended to be used to provide specific make targets.

-- 
2.51.0