Merge branch 'support-windows' into 'master'

Draft: ignore required user on MS windows

See merge request !95

docs/30_Configuration/60_File_env.md

+If a file `env` exists in the folder `./jobs/` it will be sourced by the backup scripts.
+Here you can set custom environment variables.
+
+A common usage is extending the variable PATH to execute binaries that are not located in any directory.
+
+Example:
+
+This might be helpful on MS Windows. If you put the restic binary "somewhere" eg. c:\portable\restic\restic.exe then you can add the path to the env file:
+
+```bash
+PATH=/c/portable/restic/:$PATH
+```

jobhelper.sh

@@ -5,7 +5,7 @@
 # helper script to share functions for parsing and handlinmg backup jobs
 #
 # --------------------------------------------------------------------------------
-# ah - Axel Hahn <axel.hahn@iml.unibe.ch>
+# ah - Axel Hahn <axel.hahn@unibe.ch>
 # ds - Daniel Schueler <daniel.schueler@iml.unibe.ch>
 #
 # 2016-11-10  ah,ds  v1.0
@@ -13,6 +13,7 @@
 # 2017-02-16  ah,ds  v1.2  added storage helper function
 # 2018-02-13  ah,ds  v1.3  detect samba shares based on a flag
 # 2022-10-07  ah     v1.4  unescape regex with space to prevent "grep: warning: stray \ before white space"
+# 2023-03-16  ah     v1.5  ignore required user on MS windows; source jobs/env if it exists
 # ================================================================================
 
 
@@ -41,6 +42,11 @@ STORAGEFILE="${DIR_JOBS}/transfer.job"
 function j_init(){
 
   j_banner
+  if [ -r "${DIR_JOBS}/env" ];
+  then
+    echo "INFO: loading custom environment ${DIR_JOBS}/env"
+    . "${DIR_JOBS}/env"
+  fi
 
   if [ ! -d "${DIR_LOGS}" ]; then
     mkdir -p "${DIR_LOGS}" && echo "INFO: dir created ${DIR_LOGS}"
@@ -373,16 +379,28 @@ function j_requireProcess(){
   fi
 }
 
+# detect ms windows by cygwin, mingw, msys ...
+# see https://en.wikipedia.org/wiki/Uname
+# return code is 0 for YES
+function _isMswindows(){
+  uname | grep -iE "(CYGWIN_NT|MINGW|MSYS_NT|Windows_NT|WindowsNT)" >/dev/null
+}
+
 # ------------------------------------------------------------
 # check if it was startet with a given user
+# This is skipped if MS windows was detected with "mingw".
 # param  string  username, i.e. root
 # ------------------------------------------------------------
 function j_requireUser(){
+  if _isMswindows; then
+    echo "SKIP: j_requireUser $1 is not handled on MS Windows."
+  else
     sUser=$(id | cut -f 2 -d "(" | cut -f 1 -d ")")
     if [[ "$sUser" != "$1" ]]; then
       >&2 echo "ERROR: user $1 is reqired."
       exit 5
     fi
+  fi
 }
 
 # ----------------------------------------------------------------------

jobs/env.dist

+#!/bin/bash
+# ----------------------------------------------------------------------
+# set custom variables eg. extend PATH
+# ----------------------------------------------------------------------
+
+# PATH=/c/portable/restic/:$PATH
+
+# ----------------------------------------------------------------------