record terminal traffic and use as contest

ell.sh

@@ -27,6 +27,19 @@ logging_debug "Starting ${0}";
 load_config;
 parse_arguments "${@}";
 
+if [[ "x${ELL_RECORD}" == "xtrue" && -z $ELL_TMP_SHELL_LOG ]]; then
+  export ELL_TMP_SHELL_LOG=$(mktemp);
+  export ELL_RECORD=true;
+  logging_info "Session being recorded to ${ELL_TMP_SHELL_LOG}";
+  script -q -f -c "bash -i" ${ELL_TMP_SHELL_LOG};
+  logging_debug "Removing ${ELL_TMP_SHELL_LOG}";
+  rm -f ${ELL_TMP_SHELL_LOG};
+  unset ELL_TMP_SHELL_LOG;
+  unset ELL_RECORD;
+  logging_info "Record mode exited";
+  exit 0;
+fi
+
 if [[ ! -f "${ELL_TEMPLATE_PATH}${ELL_TEMPLATE}.json" ]]; then
   logging_fatal "Template not found: ${ELL_TEMPLATE_PATH}${ELL_TEMPLATE}.json";
   exit 1;
@@ -42,6 +55,12 @@ if [[ ! -z "${ELL_INPUT_FILE}" ]]; then
   fi
 fi
 
+if [[ -z "${ELL_TMP_SHELL_LOG}" ]]; then
+  logging_debug "ELL_TMP_SHELL_LOG not set";
+else
+  logging_debug "Loading shell log from ${ELL_TMP_SHELL_LOG}";
+  SHELL_CONTEXT=$(tail -c 3000 ${ELL_TMP_SHELL_LOG} | ${BASE_DIR}/helpers/render_to_text.perl | sed  -e 's/\\/\\\\/g' -e 's/"/\\"/g'| awk '{printf "%s\\n", $0}');
+fi
 
 PAYLOAD=$(eval "cat <<EOF
 $(<${ELL_TEMPLATE_PATH}${ELL_TEMPLATE}.json)

helpers/render_to_text.perl

@@ -0,0 +1,15 @@
+#!/usr/bin/perl
+
+# https://unix.stackexchange.com/questions/14684/removing-control-chars-including-console-codes-colours-from-script-output licensed under CC BY-SA 4.0
+# GNU sed and POSIX bash does not support PCRE features like look-ahead. Therefore, adding new a dependency is not avoidable.
+
+while (<>) {
+  s/ \e[ #%()*+\-.\/]. |
+    \r | # Remove extra carriage returns also
+    (?:\e\[|\x9b) [ -?]* [@-~] | # CSI ... Cmd
+    (?:\e\]|\x9d) .*? (?:\e\\|[\a\x9c]) | # OSC ... (ST|BEL)
+    (?:\e[P^_]|[\x90\x9e\x9f]) .*? (?:\e\\|\x9c) | # (DCS|PM|APC) ... ST
+    \e.|[\x80-\x9f] //xg;
+    1 while s/[^\b][\b]//g;
+  print;
+}