[libgdata] Migrate from intltool to gettext

[Philip Withnall <pwithnall src gnome org>]

commit 826e7ce4382f1e51977d1e032648d60fe1b0dcad
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Wed Sep 27 15:02:42 2017 +0200

    Migrate from intltool to gettext
    
    See also https://wiki.gnome.org/Initiatives/GnomeGoals/GettextMigration
    
    Signed-off-by: Niels De Graef <nielsdegraef gmail com>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=787252

 Makefile.am    |   12 +--------
 autogen.sh     |    1 -
 configure.ac   |    3 +-
 po/Makevars    |   78 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 po/POTFILES.in |    1 -
 5 files changed, 81 insertions(+), 14 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 858fb7f..393195c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -839,22 +839,12 @@ MAINTAINERCLEANFILES += \
        $(GITIGNORE_MAINTAINERCLEANFILES_TOPLEVEL) \
        $(GITIGNORE_MAINTAINERCLEANFILES_MAKEFILE_IN) \
        $(GITIGNORE_MAINTAINERCLEANFILES_M4_LIBTOOL) \
+       $(GITIGNORE_MAINTAINERCLEANFILES_M4_GETTEXT) \
        build-aux/ \
        INSTALL \
        omf.make \
        gtk-doc.make \
-       ABOUT-NLS \
-       config.rpath \
-       po/Makevars.template \
-       po/Rules-quot \
-       po/boldquot.sed \
-       po/en@boldquot.header \
-       po/en@quot.header \
-       po/insert-header.sin \
-       po/quot.sed \
-       po/remove-potcdate.sin \
        m4/gtk-doc.m4 \
-       m4/intltool.m4 \
        $(NULL)
 
 AM_DISTCHECK_CONFIGURE_FLAGS += --enable-gtk-doc
diff --git a/autogen.sh b/autogen.sh
index 9bf7673..b6efba6 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -24,7 +24,6 @@ fi
 
 aclocal --install || exit 1
 gtkdocize --copy || exit 1
-intltoolize --force --copy --automake || exit 1
 autoreconf --verbose --force --install || exit 1
 
 cd "$olddir"
diff --git a/configure.ac b/configure.ac
index f128e3f..9d56e54 100644
--- a/configure.ac
+++ b/configure.ac
@@ -186,10 +186,11 @@ AC_CHECK_HEADERS([netinet/in.h])
 AC_CHECK_HEADERS([sys/socket.h])
 
 # Internationalisation support
+AM_GNU_GETTEXT([external])
+AM_GNU_GETTEXT_VERSION([0.19.8])
 GETTEXT_PACKAGE=gdata
 AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE, ["$GETTEXT_PACKAGE"], [Define to the Gettext package name])
 AC_SUBST(GETTEXT_PACKAGE)
-IT_PROG_INTLTOOL([0.40.0])
 
 # Code coverage
 AX_CODE_COVERAGE
diff --git a/po/Makevars b/po/Makevars
new file mode 100644
index 0000000..f834472
--- /dev/null
+++ b/po/Makevars
@@ -0,0 +1,78 @@
+# Makefile variables for PO directory in any package using GNU gettext.
+
+# Usually the message domain is the same as the package name.
+DOMAIN = $(PACKAGE)
+
+# These two variables depend on the location of this directory.
+subdir = po
+top_builddir = ..
+
+# These options get passed to xgettext.
+XGETTEXT_OPTIONS = --from-code=UTF-8 --keyword=_ --keyword=N_ --keyword=C_:1c,2 --keyword=NC_:1c,2 
--keyword=g_dngettext:2,3 --add-comments
+
+# This is the copyright holder that gets inserted into the header of the
+# $(DOMAIN).pot file.  Set this to the copyright holder of the surrounding
+# package.  (Note that the msgstr strings, extracted from the package's
+# sources, belong to the copyright holder of the package.)  Translators are
+# expected to transfer the copyright for their translations to this person
+# or entity, or to disclaim their copyright.  The empty string stands for
+# the public domain; in this case the translators are expected to disclaim
+# their copyright.
+COPYRIGHT_HOLDER = $(PACKAGE_STRING) authors
+
+# This tells whether or not to prepend "GNU " prefix to the package
+# name that gets inserted into the header of the $(DOMAIN).pot file.
+# Possible values are "yes", "no", or empty.  If it is empty, try to
+# detect it automatically by scanning the files in $(top_srcdir) for
+# "GNU packagename" string.
+PACKAGE_GNU = no
+
+# This is the email address or URL to which the translators shall report
+# bugs in the untranslated strings:
+# - Strings which are not entire sentences, see the maintainer guidelines
+#   in the GNU gettext documentation, section 'Preparing Strings'.
+# - Strings which use unclear terms or require additional context to be
+#   understood.
+# - Strings which make invalid assumptions about notation of date, time or
+#   money.
+# - Pluralisation problems.
+# - Incorrect English spelling.
+# - Incorrect formatting.
+# It can be your email address, or a mailing list address where translators
+# can write to without being subscribed, or the URL of a web page through
+# which the translators can contact you.
+MSGID_BUGS_ADDRESS = $(PACKAGE_BUGREPORT)
+
+# This is the list of locale categories, beyond LC_MESSAGES, for which the
+# message catalogs shall be used.  It is usually empty.
+EXTRA_LOCALE_CATEGORIES =
+
+# This tells whether the $(DOMAIN).pot file contains messages with an 'msgctxt'
+# context.  Possible values are "yes" and "no".  Set this to yes if the
+# package uses functions taking also a message context, like pgettext(), or
+# if in $(XGETTEXT_OPTIONS) you define keywords with a context argument.
+USE_MSGCTXT = yes
+
+# These options get passed to msgmerge.
+# Useful options are in particular:
+#   --previous            to keep previous msgids of translated messages,
+#   --quiet               to reduce the verbosity.
+MSGMERGE_OPTIONS =
+
+# These options get passed to msginit.
+# If you want to disable line wrapping when writing PO files, add
+# --no-wrap to MSGMERGE_OPTIONS, XGETTEXT_OPTIONS, and
+# MSGINIT_OPTIONS.
+MSGINIT_OPTIONS =
+
+# This tells whether or not to regenerate a PO file when $(DOMAIN).pot
+# has changed.  Possible values are "yes" and "no".  Set this to no if
+# the POT file is checked in the repository and the version control
+# program ignores timestamps.
+PO_DEPENDS_ON_POT = no
+
+# This tells whether or not to forcibly update $(DOMAIN).pot and
+# regenerate PO files on "make dist".  Possible values are "yes" and
+# "no".  Set this to no if the POT file and PO files are maintained
+# externally.
+DIST_DEPENDS_ON_UPDATE_PO = no
diff --git a/po/POTFILES.in b/po/POTFILES.in
index c0dbc8d..2e259b4 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -1,6 +1,5 @@
 # List of source files containing translatable strings.
 # Please keep this file sorted alphabetically.
-[encoding: UTF-8]
 gdata/gdata-access-handler.c
 gdata/gdata-batch-operation.c
 gdata/gdata-client-login-authorizer.c