Simplify boolean flag handling

mkproj.sh

@@ -2,12 +2,12 @@
 
 config=$HOME/.config/mkprojrc
 source $config
-default=0
+default=false
 mainfile=main.cpp
-gitfav=0
-library=0
-simple=0
-usegitroot=0
+gitfav=false
+library=false
+simple=false
+usegitroot=false
 
 usage() {
     echo "usage: $progname [-f|-l|-n|-s] [[-d] -g <gitroot>|-G] [-t <tplroot>] PROJECTNAME" >&2
@@ -34,28 +34,28 @@ while getopts :dfGg:lnst:v opt
 do
     case $opt in
         d)
-            default=1
+            default=true
             ;;
         f)
             mainfile=filter.cpp
             ;;
         G)
-            gitfav=1
+            gitfav=true
             ;;
         g)
             gitroot=$OPTARG
-            usegitroot=1
+            usegitroot=true
             ;;
         l)
-            library=1
+            library=true
             ;;
         n)
             mainfile=main.cpp
-            library=0
-            simple=0
+            library=false
+            simple=false
             ;;
         s)
-            simple=1
+            simple=true
             ;;
         t)
             tplroot=$OPTARG
@@ -83,7 +83,7 @@ shift $(( OPTIND - 1 ))
 
 proj=${1//[- ]/_} # replace all spaces and dashes with underscores
 
-if [ $default = 1 ]
+if $default
 then
     check_gitroot
     if grep -q gitroot $config
@@ -94,7 +94,7 @@ then
     fi
 fi
 
-if [ $gitfav = 1 ] || [ $usegitroot = 1 ]
+if $gitfav || $usegitroot
 then
     check_gitroot
     git clone "$gitroot/$proj.git" || die "not an existing repo: $proj"
@@ -102,7 +102,7 @@ else
     mkdir -p "$proj"
 fi
 
-if [ $simple = 1 ]
+if $simple
 then
     cp $tplroot/Makefile.simple $proj/Makefile
     cp $tplroot/main.simple.cpp $proj/$proj.cpp
@@ -115,7 +115,7 @@ else
     sed -e "s/{PROJECT}/$proj/" -e "s/{PROJ}/$uproj/" $tplroot/version.hpp > $proj/src/version.hpp
     sed -e "s/{PROJECT}/$proj/" $tplroot/version.cpp > $proj/src/version.cpp
 
-    if [ $library = 1 ]
+    if $library
     then
         mkdir -p $proj/man/man3
         sed -e "s/{PROJECT}/$proj/" $tplroot/lib.3 > $proj/man/man3/$proj.3