first commit

main

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+#!/usr/bin/env bash
+
+# global variables
+
+# functions
+
+function bashrc_count_lines {
+    wc -l "$HOME/.bashrc" | cut -d' ' -f1
+}
+
+function bashrc_watch_start {
+    if [ -n "${BASHRC_LINES+set}" ]; then
+        echo "provided so far BASHRC_LINES=$BASHRC_LINES"
+    else
+        echo 'count lines of .bashrc'
+        BASHRC_LINES=$(bashrc_count_lines)
+    fi
+}
+
+function bashrc_watch_end {
+    bashrc_lines=$(bashrc_count_lines)
+    if [[ "$BASHRC_LINES" -lt "$bashrc_lines" ]]; then
+        echo '*****************************'
+        echo '* BASHRC has evolved        *'
+        echo '* please execute:           *'
+        echo '*                           *'
+        echo "*   source \$HOME/.bashrc    *"
+        echo '*                           *'
+        echo '*****************************'
+    else
+        echo 'everything is fine!'
+    fi
+}
+
+function bashrc_env_sync {
+    env_var="$1"
+    env_value="$2"
+    if printenv | grep -q "$env_var"; then
+        real_value=$(eval "echo \$$env_var")
+        echo "success for $env_var = $real_value"
+    else
+        session_line="export ${env_var}=${env_value}"
+        append_or_replace "^${session_line}.*" "$session_line" "$HOME/.bashrc" &>/dev/null
+        eval "$session_line"
+        set +e
+        eval "BASHRC_LINES=$BASHRC_LINES $0"
+        exit $?
+    fi
+}
+
+# main
+
+set -Eeu
+bashrc_watch_start
+echo 'init'
+bashrc_env_sync 'SESSION_RESTART' true
+
+echo 'suite'
+bashrc_watch_end