Add ~/.bashrc.d pattern support

containers/base/Containerfile

@@ -178,6 +178,11 @@ COPY entrypoint.sh /entrypoint.sh
 COPY fix_user.sh $ENTRYPOINT_DIR/00_fix_user.sh
 COPY login_shim.sh $ENTRYPOINT_DIR/01_login_shim.sh
 
+# Add ~/.bashrc.d support to the user's ~/.bashrc
+COPY bashrcd_fragment.bash /tmp/bashrcd_fragment.bash
+RUN cat /tmp/bashrcd_fragment.bash >> $DEV_USER_HOME/.bashrc \
+    && sudo -u $DEV_USER mkdir -m 755 $DEV_USER_HOME/.bashrc.d
+
 # Here we set the entry point to the main entry point script. This script in
 # turn execs a chain of other entry points. This allows other images to layer
 # their own entry points onto the original entry point.

containers/base/bashrcd_fragment.bash

@@ -0,0 +1,25 @@
+
+########## BASHRC.D BEGIN ##########
+declare -a brc_files
+bashrc_d="$HOME/.bashrc.d"
+if [[ -d $bashrc_d ]]; then
+    readarray -t -d '' brc_files < \
+        <(find $bashrc_d -type f -regex '.*\.\(ba\)?sh$' -print0 | LC_ALL=C sort -z)
+fi
+declare -A brc_elapsed
+for brc_file in "${brc_files[@]}"; do
+    start_time=$EPOCHREALTIME
+    source "$brc_file"
+    end_time=$EPOCHREALTIME
+    brc_elapsed["$brc_file"]=$(awk 'BEGIN {printf "%.2f", '"($end_time - $start_time)}")
+done
+: "${BASHRC_D_PROFILE:=0}"
+if [[ $BASHRC_D_PROFILE -ne 0 ]] && [[ ${#brc_elapsed[@]} -gt 0 ]]; then
+    echo "Elapsed time to source '.bashrc.d':"
+    for brc_file in "${!brc_elapsed[@]}"; do
+        printf "%s %s\n" "${brc_elapsed[$brc_file]}" "$(basename "$brc_file")"
+    done | sort -rn | while read -r time name; do
+        printf "  - %-20s %10s seconds\n" "$name" "$time"
+    done
+fi
+########### BASHRC.D END ###########