Close issue 40 by making directory creation prompts optional

Add config file option MKDIR_PROMPT which, when set to NO, causes sbopkg to
skip prompting the user for directory creations.

ChangeLog-current.txt

@@ -10,4 +10,8 @@ enhancements:
     some cases; thanks to artourter for the report, thanks to slakmagik for
     the hard work in fixing this and thanks to Mauro for the review and
     suggestions.
+  * Add the ability to skip the prompts for sbopkg's directory creations. This
+    is useful, for example, if you have some SBo/sbopkg directories on a
+    temporary filesystem and don't want to be bothered with repeated directory
+    creation prompts. Thanks to agikhan for the report.
 +--------------------------+

src/etc/sbopkg/sbopkg.conf.new

@@ -19,6 +19,7 @@ KEEPLOG=YES
 LOGFILE=$LOGDIR/sbopkg-build-log
 DEBUG=0
 CLEANUP=NO
+MKDIR_PROMPT=YES
 
 # Set this to YES to allow multiple instances of sbopkg to run.
 # Please read the sbopkg.conf(5) man page before doing so

src/usr/man/man5/sbopkg.conf.5

@@ -13,6 +13,8 @@ Slackware packages.  A sample file is provided at
 /etc/sbopkg/sbopkg.conf.new.  Also, please see a note below about
 $ARCH.
 
+Boolean options are case-insensitive.
+
 The different configuration options are:
 
 .TP 5
@@ -185,6 +187,18 @@ set to 2, all non-updated packages are also listed. Changing DEBUG to 1 or
 
 The default value of DEBUG is: 0.
 
+.TP 5
+.B MKDIR_PROMPT
+.br
+This option may be set to YES or NO. When set to YES, sbopkg will prompt
+for confirmation before changing the filesystem by creating its
+directories. If you do not wish to be prompted (for instance, if you
+have some of the directories on a temporary filesystem and don't wish to
+be prompted for confirmation each time the filesystem is reinitialized)
+you can set this to NO.
+
+The default value of MKDIR_PROMPT is: YES.
+
 .TP 5
 .B RSYNCFLAGS
 .br

src/usr/sbin/sbopkg

@@ -138,6 +138,7 @@ EOF
     yesno_to_setunset KEEPLOG
     yesno_to_setunset CLEANUP
     yesno_to_setunset ALLOW_MULTI
+    yesno_to_setunset MKDIR_PROMPT
 
     # If multiple instances of sbopkg are allowed, they need their own
     # private $SBOPKGTMP.
@@ -283,11 +284,15 @@ ck_dir() {
 
     # Try to create the specified folder
     if [[ ! -d $DIR ]]; then
-        echo
-        crunch_fmt "$MSG"
-        echo
-        read -n1 -sep "Press any key to continue or Ctrl-C to exit."
-        mkdir -p $DIR 2> /dev/null && echo "Directory created." || ERROR=1
+        if [[ $MKDIR_PROMPT ]]; then
+            echo
+            crunch_fmt "$MSG"
+            echo
+            read -n1 -sep "Press any key to continue or Ctrl-C to exit."
+            mkdir -p $DIR 2> /dev/null && echo "Directory created." || ERROR=1
+        else
+            mkdir -p $DIR 2> /dev/null || ERROR=1
+        fi
     fi
 
     # Try to create a file in the specified folder