[gitg] Small autogen.sh improvements

[Jesse van den Kieboom <jessevdk src gnome org>]

commit 92c76a5570da1d4c9404770941e0b03d5ae0e694
Author: Jesse van den Kieboom <jessevdk gnome org>
Date:   Sat Nov 26 10:58:04 2016 +0100

    Small autogen.sh improvements

 autogen.sh |   58 +++++++++++++++++++++++++++++++++++++++++-----------------
 1 files changed, 41 insertions(+), 17 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index fced2c9..0c3ecd7 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -7,38 +7,62 @@ test -n "$srcdir" || srcdir=.
 olddir=`pwd`
 cd "$srcdir"
 
-INTLTOOLIZE=`which intltoolize`
-if test -z $INTLTOOLIZE; then
-        echo "*** No intltoolize found, please install the intltool package ***"
+(test -f configure.ac) || {
+        echo "*** ERROR: Directory '$srcdir' does not look like the top-level project directory ***"
         exit 1
+}
+
+# shellcheck disable=SC2016
+PKG_NAME=$(autoconf --trace 'AC_INIT:$1' configure.ac)
+
+if [ "$#" = 0 -a "x$NOCONFIGURE" = "x" ]; then
+        echo "*** WARNING: I am going to run 'configure' with no arguments." >&2
+        echo "*** If you wish to pass any to it, please specify them on the" >&2
+        echo "*** '$0' command line." >&2
+        echo "" >&2
 fi
 
+ACLOCAL=`which aclocal`
+INTLTOOLIZE=`which intltoolize`
 AUTORECONF=`which autoreconf`
-if test -z $AUTORECONF; then
-        echo "*** No autoreconf found, please install it ***"
+LIBTOOL=`which libtoolize`
+
+if test -z $ACLOCAL; then
+        echo "*** No aclocal found, please install it ***"
         exit 1
 fi
 
-if test -z `which autopoint`; then
-        echo "*** No autopoint found, please install it ***"
+if test -z $INTLTOOLIZE; then
+        echo "*** No intltoolize found, please install the intltool package ***"
         exit 1
 fi
 
-LIBTOOL=`which libtoolize`
-if test -z $LIBTOOL; then
-        echo "*** No libtool found, please install it ***"
+if test -z $AUTORECONF; then
+        echo "*** No autoreconf found, please install it ***"
         exit 1
 fi
 
-git submodule update --init --recursive
+if ! test -z `which git` && test -d .git; then
+        git submodule update --init --recursive
 
-if [ $? != 0 ]; then
-    echo "*** Failed to download submodules. Maybe you have a bad connection or a submodule was not forked?"
-    exit 1
+        if [ $? != 0 ]; then
+                echo "*** Failed to download submodules. Maybe you have a bad connection or a submodule was 
not forked?"
+                exit 1
+        fi
 fi
 
-autopoint --force
-AUTOPOINT='intltoolize --automake --copy' autoreconf --force --install --verbose
+aclocal --install || exit 1
+intltoolize --force --copy --automake || exit 1
+autoreconf --verbose --force --install || exit 1
 
 cd "$olddir"
-test -n "$NOCONFIGURE" || "$srcdir/configure" "$@"
+
+if [ "$NOCONFIGURE" = "" ]; then
+        $srcdir/configure "$@" || exit 1
+
+        if [ "$1" = "--help" ]; then exit 0 else
+                echo "Now type 'make' to compile $PKG_NAME" || exit 1
+        fi
+else
+        echo "Skipping configure process."
+fi