From ea6e85a0208a168e198603c0ab673082790f75f1 Mon Sep 17 00:00:00 2001
From: Martin Winkler <efelon@winklerfamilie.eu>
Date: Wed, 11 May 2022 15:14:19 +0200
Subject: [PATCH] Adding --liststeps and --version

---
 sequencer.sh | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 55 insertions(+), 2 deletions(-)

diff --git a/sequencer.sh b/sequencer.sh
index 881cdb9..99c151d 100755
--- a/sequencer.sh
+++ b/sequencer.sh
@@ -14,6 +14,11 @@ set -o pipefail
 
 ## Globals 
 {
+  readonly _sqr_version=16
+  readonly _sqr_versionMajor=0
+  readonly _sqr_versionMinor=0
+  readonly _sqr_versionString="${_sqr_version}.${_sqr_versionMajor}.${_sqr_versionMinor}"
+
   ## Seq
   readonly seq_name="${_sqn_alias:-${0##*/}}"
   readonly seq_dir="$(cd -- "$(dirname -- "${0}")" && pwd)"
@@ -34,6 +39,7 @@ set -o pipefail
   readonly sqr_origin="$(cd -- "$(dirname -- \
     "$(readlink -f -- "${BASH_SOURCE[0]}")")" && pwd)"
 
+  _sqr_stepMax=512
   _sqr_interactive=1
   _sqr_debug=0
   _sqr_dry=0
@@ -210,6 +216,11 @@ set -o pipefail
   # trap 'sqr::error_report "${FUNCNAME:-.}" ${LINENO}' ERR
 }
 
+# check if there is another PID other than this one
+running() {
+  pidof -o %PPID -x "${0##*/}">>/dev/null
+}
+
 # exists [-f] [--] [ELEMENT]
 #  [ELEMENT]
 #       : either a variable name or
@@ -227,12 +238,12 @@ exists() {
         func="${2:-}"
     esac
   done
+  sqr::debugContinue
   if [[ -n "${func}" ]] ; then
     declare -F "${func}" &>>/dev/null
   else
     [[ -n "${!1:-}" ]]
   fi
-  sqr::debugContinue
 }
 
 # interactive
@@ -351,6 +362,42 @@ ask() {
   fi
 }
 
+# listSteps [FILTER STRING]
+#  [FILTER STRING]
+#    show only steps and aliases starting with [FILTER STRING]
+listSteps() {
+  local aList=()
+  local aSearch="${1:-}"
+  local locAlias=
+
+  for ((i=1; i<=${_sqr_stepMax}; i++)); do
+    # Display step reference in help if step function exists
+    exists -f step_${i} || continue
+
+    # Display alias if exists
+    if exists -f step_${i}_alias ; then
+      step_${i}_alias
+      locAlias=("$ALIAS")
+    else
+      locAlias=("$i")
+    fi
+
+    if [ -z "$aSearch" ]; then
+      aList+=("$locAlias")
+    elif [[ "$locAlias" =~ ^$aSearch ]]; then
+      aList+=("$locAlias")
+    fi
+  done
+
+  [ ${#aList[@]} -ne 0 ] && printf '%s\n' "${aList[@]}"
+}
+
+# showVersion
+showVersion() {
+  printf 'Sequencer    %s\n' "${_sqr_versionString}"
+  printf 'Seq Revision %s\n' "${VERSION_SEQREV:-"-"}"
+}
+
 # exe <COMMAND>
 # Handle dry run and verbose output for commands without pipe and/or redirects
 exe() {
@@ -388,6 +435,10 @@ sqr::main() {
       --dry-run|-d)
         _sqr_dry=1
         shift ;;
+      --liststeps|-ls)
+        shift
+        listSteps "${1:-}"
+        exit 0;;
       --quiet|-q)
         _sqr_interactive=0
         shift ;;
@@ -398,6 +449,9 @@ sqr::main() {
       --verbose|-v)
         _sqr_verbose=1
         shift ;;
+      --version) # version request
+        showVersion
+        exit 0;;
     esac
   done
 
@@ -410,7 +464,6 @@ sqr::main() {
   fi
 
   sqr::print 'Running...\n'
-  confirm -y 'Continue?'
   seq_config 2>/dev/null || true
   step_1 "$@"
 }