Enclose main body to main()

Makes it easier to grok the structure and keep the global space clean.

src/bin/satcmd.skel

@@ -42,30 +42,32 @@ usage() {
             "--version"
 }
 
-while true; do case $1 in
-    -d|--debug)     export SHELLFU_DEBUG=true; shift   ;;
-    -v|--verbose)   export SHELLFU_VERBOSE=true; shift ;;
-    --version)      saturnin__version; exit            ;;
-    --version-semver) echo "$SATURNIN_APP_VERSION"; exit ;;
-    -*)             usage;                          ;;
-    --*)            usage;                          ;;
-    --)             shift; break                    ;;
-    "")             usage;                          ;;
-    *)              break;                          ;;
-esac done
-
-debug -v SHELLFU_PATH SATURNIN_LIBEXEC SHELLFU_INIGREP_PATH
-debug "\$*='$*'"
-
-export SATURNIN_SUBCOMMAND="$1"
-shift
+main() {
+    local subcommand
+    while true; do case $1 in
+        -d|--debug)     export SHELLFU_DEBUG=true; shift   ;;
+        -v|--verbose)   export SHELLFU_VERBOSE=true; shift ;;
+        --version)      saturnin__version; exit            ;;
+        --version-semver) echo "$SATURNIN_APP_VERSION"; exit ;;
+        -*)             usage;                          ;;
+        --*)            usage;                          ;;
+        --)             shift; break                    ;;
+        "")             usage;                          ;;
+        *)              break;                          ;;
+    esac done
+    subcommand="$1"; shift
+    export SATURNIN_SUBCOMMAND="$subcommand"
+    debug -v SHELLFU_PATH SATURNIN_LIBEXEC SHELLFU_INIGREP_PATH SATURNIN_SUBCOMMAND
+    debug "\$*='$*'"
+    case "$subcommand" in
+        conf)               inigrep "$@"    ;;
+        help)               saturnin__help ;;
+        _ls_subcommands)    saturnin__lssc ;;
+        _lsfun)             shellfu-get lsfun ;;
+        _lsmod)             shellfu-get lsmod ;;
+        _ffrun)             ffrun "$@" ;;
+        *)                  saturnin__runsc "$@" ;;
+    esac
+}
 
-case "$SATURNIN_SUBCOMMAND" in
-    conf)               inigrep "$@"    ;;
-    help)               saturnin__help ;;
-    _ls_subcommands)    saturnin__lssc ;;
-    _lsfun)             shellfu-get lsfun ;;
-    _lsmod)             shellfu-get lsmod ;;
-    _ffrun)             ffrun "$@" ;;
-    *)                  saturnin__runsc "$@" ;;
-esac
+main "$@"