tests/lcitool: append user setting stanza to dockerfiles

For the cross-compilation use-case it is important to add the host
user to the dockerfile so we can map them to the docker environment
when cross-building files.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230228190653.1602033-19-alex.bennee@linaro.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/tests/lcitool/refresh b/tests/lcitool/refresh
index cc9e34a..c0d7ad5 100755
--- a/tests/lcitool/refresh
+++ b/tests/lcitool/refresh
@@ -53,6 +53,15 @@ def generate(filename, cmd, trailer):
         content += trailer
     atomic_write(filename, content)
 
+# Optional user setting, this will always be the last thing added
+# so maximise the number of layers that are cached
+add_user_mapping = [
+    "# As a final step configure the user (if env is defined)",
+    "ARG USER",
+    "ARG UID",
+    "RUN if [ \"${USER}\" ]; then \\",
+    "  id ${USER} 2>/dev/null || useradd -u ${UID} -U ${USER}; fi\n"
+]
 
 def generate_dockerfile(host, target, cross=None, trailer=None):
     filename = Path(src_dir, "tests", "docker", "dockerfiles", host + ".docker")
@@ -60,6 +69,12 @@ def generate_dockerfile(host, target, cross=None, trailer=None):
     if cross is not None:
         cmd.extend(["--cross", cross])
     cmd.extend([target, "qemu"])
+
+    if trailer is not None:
+        trailer += "\n".join(add_user_mapping)
+    else:
+        trailer = "\n".join(add_user_mapping)
+
     generate(filename, cmd, trailer)