1 files changed, 55 insertions, 0 deletions
diff --git a/devel_tools/ci_container/entry.sh b/devel_tools/ci_container/entry.sh
new file mode 100644
index 0000000..7779665
--- /dev/null
+++ b/devel_tools/ci_container/entry.sh
@@ -0,0 +1,55 @@
+#!/bin/sh -ex
+
+# This script is used for running commands inside the container as a user with
+# specified UID and GID so the files created from inside the container have the
+# same owner and group as the files created outside of the container. This makes
+# it easy to manipulate the files as the user outside the container.
+
+if [ $# -lt 3 ]; then
+    echo "Usage: $0 UID GID CMD [ARGS...] " >&2
+    exit 1
+fi
+
+UID=$1
+GID=$2
+USER_NAME=new-user
+GROUP_NAME=new-group
+shift 2
+
+if ! getent passwd $UID >/dev/null; then
+    # The UID does not exist, create it
+    useradd -m -u $UID $USER_NAME
+else
+    USER_NAME=$(id -n -u $UID)
+fi
+
+if ! getent group $GID >/dev/null; then
+    # The GID does not exist, create it
+    groupadd -g $GID $GROUP_NAME
+else
+    GROUP_NAME=$(getent group $GID | cut -d: -f1)
+fi
+
+# Make sure the group is the user's primary group
+usermod -g $GROUP_NAME $USER_NAME
+
+# Check that the user has expected UID and GID
+ACTUAL_UID=$(su -c 'id -u' $USER_NAME)
+if [ $ACTUAL_UID -ne $UID ]; then
+   echo "Error: Actual UID $ACTUAL_UID != $UID"
+   exit 1
+fi
+
+ACTUAL_GID=$(su -c 'id -g' $USER_NAME)
+if [ $ACTUAL_GID -ne $GID ]; then
+   echo "Error: Actual GID $ACTUAL_GID != $GID"
+   exit 1
+fi
+
+if [ ! -e /.cache ]; then
+    # Needed for running pre-commit
+    mkdir /.cache
+    chown $USER_NAME: /.cache
+fi
+
+su -c "$*" $USER_NAME