autogen helper functions

Original commit message from CVS:
autogen helper functions

diff --git a/gst-autogen.sh b/gst-autogen.sh
new file mode 100644 (file)
index 0000000..aaa3d8a
--- /dev/null
+++ b/gst-autogen.sh
@@ -0,0 +1,140 @@
+# helper functions for autogen.sh
+
+debug ()
+# print out a debug message if DEBUG is a defined variable
+{
+  if test ! -z "$DEBUG"
+  then
+    echo "DEBUG: $1"
+  fi
+}
+
+version_check ()
+# check the version of a package
+# first argument : package name (executable)
+# second argument : source download url
+# rest of arguments : major, minor, micro version
+{
+  PACKAGE=$1
+  URL=$2
+  MAJOR=$3
+  MINOR=$4
+  MICRO=$5
+
+  WRONG=
+
+  debug "major $MAJOR minor $MINOR micro $MICRO"
+  VERSION=$MAJOR
+  if test ! -z "$MINOR"; then VERSION=$VERSION.$MINOR; else MINOR=0; fi
+  if test ! -z "$MICRO"; then VERSION=$VERSION.$MICRO; else MICRO=0; fi
+
+  debug "major $MAJOR minor $MINOR micro $MICRO"
+  
+  test -z "$NOCHECK" && {
+      echo -n "  checking for $1 >= $VERSION ... "
+  } || {
+      return 0
+  }
+  
+  ($PACKAGE --version) < /dev/null > /dev/null 2>&1 || 
+  {
+       echo
+       echo "You must have $PACKAGE installed to compile $package."
+       echo "Download the appropriate package for your distribution,"
+       echo "or get the source tarball at $URL"
+       return 1
+  }
+  # the following line is carefully crafted sed magic
+  pkg_version=`$PACKAGE --version|head -n 1|sed 's/^[a-zA-z\.\ ()]*//;s/ .*$//'`
+  debug "pkg_version $pkg_version"
+  pkg_major=`echo $pkg_version | cut -d. -f1`
+  pkg_minor=`echo $pkg_version | cut -d. -f2`
+  pkg_micro=`echo $pkg_version | cut -d. -f3`
+  test -z "$pkg_minor" && pkg_minor=0
+  test -z "$pkg_micro" && pkg_micro=0
+
+  debug "found major $pkg_major minor $pkg_minor micro $pkg_micro"
+
+  #start checking the version
+  debug "version check"
+
+  if [ ! "$pkg_major" \> "$MAJOR" ]; then
+    debug "$pkg_major <= $MAJOR"
+    if [ "$pkg_major" \< "$MAJOR" ]; then
+      WRONG=1
+    elif [ ! "$pkg_minor" \> "$MINOR" ]; then
+      if [ "$pkg_minor" \< "$MINOR" ]; then
+        WRONG=1
+      elif [ "$pkg_micro" \< "$MICRO" ]; then
+       WRONG=1
+      fi
+    fi
+  fi
+
+  if test ! -z "$WRONG"; then
+    echo "found $pkg_version, not ok !"
+    echo
+    echo "You must have $PACKAGE $VERSION or greater to compile $package."
+    echo "Get the latest version from $URL"
+    return 1
+  else
+    echo "found $pkg_version, ok."
+  fi
+}
+
+autoconf_2.52d_check ()
+{
+  # autoconf 2.52d has a weird issue involving a yes:no error
+  # so don't allow it's use
+  ac_version=`autoconf --version|head -n 1|sed 's/^[a-zA-z\.\ ()]*//;s/ .*$//'`
+  if test "$ac_version" = "2.52d"; then
+    echo "autoconf 2.52d has an issue with our current build."
+    echo "We don't know who's to blame however.  So until we do, get a"
+    echo "regular version.  RPM's of a working version are on the gstreamer site."
+    exit 1
+  fi
+}
+
+autogen_options ()
+{
+  for i in $@; do
+      if test "$i" = "--autogen-noconfigure"; then
+          NOCONFIGURE=defined
+          echo "+ configure run disabled"
+      elif test "$i" = "--autogen-nocheck"; then
+          NOCHECK=defined
+          echo "+ autotools version check disabled"
+      elif test "$i" = "--autogen-debug"; then
+          DEBUG=defined
+          echo "+ debug output enabled"
+      elif test "$i" = "--help"; then
+          echo "autogen.sh help options: "
+          echo " --autogen-noconfigure    don't run the configure script"
+          echo " --autogen-nocheck        don't do version checks"
+          echo " --autogen-debug          debug the autogen process"
+         exit 1
+      fi
+  done
+}
+
+toplevel_check ()
+{
+  srcfile=$1
+  test -f $srcfile || {
+        echo "You must run this script in the top-level $package directory"
+        exit 1
+  }
+}
+
+
+tool_run ()
+{
+  tool=$1
+  options=$2
+  echo "+ running $tool $options..."
+  $tool $options || {
+    echo
+    echo $tool failed
+    exit 1
+  }
+}