RELEASING: update to use meson based steps

RELEASING

@@ -1,6 +1,5 @@
 
-
-The ModemManager releases are generated using the GNU autotools.
+The ModemManager releases are generated using meson.
 
 0.1) For major releases:
      * Increment mm_minor_version and reset mm_micro_version.
@@ -10,32 +9,26 @@ The ModemManager releases are generated using the GNU autotools.
 0.2) For stable branch releases:
      * Increment mm_micro_version.
 
-1) Configure and build the whole project, making sure gtk-doc is enabled:
+1) Add signed tag:
+    $ git tag -s 1.20.0
 
-    $ NOCONFIGURE=1 ./autogen.sh
-    $ ./configure --enable-gtk-doc
-    $ make -j8
+   The description included in the signed tag could be:
+    Release 1.20.0
 
-2) Run distcheck so that the source distribution tarball is generated, and the
-   project test suite is run on it:
+2) Configure and build the whole project, making sure gtk-doc and introspection
+   are enabled:
+    $ meson setup build \
+        --prefix=/usr \
+        --buildtype=release \
+        -Dintrospection=true \
+        -Dgtk_doc=true
+    $ ninja -C build
 
-    $ make distcheck
+3) Run the test suite and install locally:
+    $ ninja -C build test
+    $ sudo ninja -C build install
 
-3) Compute checksum of the tarball so that it can be referenced in the release
-   email:
-
-    $ sha256sum ModemManager-${VERSION}.tar.xz
-
-4) Sign release tarball, and verify it (*):
-
-    $ gpg --detach-sign --armor ModemManager-${VERSION}.tar.xz
-    $ gpg --verify ModemManager-${VERSION}.tar.xz.asc ModemManager-${VERSION}.tar.xz
-
-5) Upload source tarball (.tar.xz) and signature (.tar.xz.asc) to
-   freedesktop.org.
-    $ scp ModemManager-${VERSION}.tar.xz* fd.o:${ModemManager}/
-
-6) Create directories for the manpages and gtk-doc documentation in
+4) Create directories for the manpages and gtk-doc documentation in
    freedesktop.org, and also update the 'latest' links:
     $ ssh fd.o
     [fd.o] $ cd ${ModemManager}/man/
@@ -48,27 +41,39 @@ The ModemManager releases are generated using the GNU autotools.
     [fd.o] $ mkdir -p ${VERSION}/libmm-glib
     [fd.o] $ ln -s ${VERSION} latest
 
-7) Generate HTML for the manpages:
+5) Generate HTML for the manpages:
     $ roffit < docs/man/mmcli.1 > mmcli.1.html
     $ roffit < docs/man/ModemManager.8 > ModemManager.8.html
 
-8) Upload manpages in HTML to freedesktop.org:
+6) Upload manpages in HTML to freedesktop.org:
     $ scp *.html fd.o:${ModemManager}/man/${VERSION}/
 
-9) Upload the gtk-doc in HTML available inside the source tarball to
-   freedesktop.org. It must be the one inside the tarball because it contains
-   the correct fixed refs to the online documentation of the dependencies
-   (e.g. the glib/gobject/gio documentation URLs in http://developer.gnome.org)
-    $ tar -Jxvf ModemManager-${VERSION}.tar.xz
-    $ scp ModemManager-${VERSION}/docs/reference/api/html/* fd.o:${ModemManager}/doc/${VERSION}/ModemManager/
-    $ scp ModemManager-${VERSION}/docs/reference/libmm-glib/html/* fd.o:${ModemManager}/doc/${VERSION}/libmm-glib/
+7) Copy documentation from /usr/share/gtk-doc and fix online references manually
+    $ mkdir ModemManager-html
+    $ cp -r /usr/share/gtk-doc/html/ModemManager/* ModemManager-html/
+    $ for FILE in $(ls ModemManager-html/*.html); do \
+        sed -i 's|<a[^>]* href="\.\./glib/[^"]*|<a href="https://docs.gtk.org/glib/|g' $FILE; \
+        sed -i 's|<a[^>]* href="\.\./gobject/[^"]*|<a href="https://docs.gtk.org/gobject/|g' $FILE; \
+        sed -i 's|<a[^>]* href="\.\./gio/[^"]*|<a href="https://docs.gtk.org/gio/|g' $FILE; \
+      done
+    $ mkdir libmm-glib-html
+    $ cp -r /usr/share/gtk-doc/html/libmm-glib/* libmm-glib-html/
+    $ for FILE in $(ls libmm-glib-html/*.html); do \
+        sed -i 's|<a[^>]* href="\.\./glib/[^"]*|<a href="https://docs.gtk.org/glib/|g' $FILE; \
+        sed -i 's|<a[^>]* href="\.\./gobject/[^"]*|<a href="https://docs.gtk.org/gobject/|g' $FILE; \
+        sed -i 's|<a[^>]* href="\.\./gio/[^"]*|<a href="https://docs.gtk.org/gio/|g' $FILE; \
+      done
 
-10.1) For major releases:
+8) Upload the modified HTML files to freedesktop.org:
+    $ scp ModemManager-html/* fd.o:${ModemManager}/doc/${VERSION}/ModemManager/
+    $ scp libmm-glib-html/* fd.o:${ModemManager}/doc/${VERSION}/libmm-glib/
+
+9.1) For major releases:
      * Fork new stable branch (e.g. mm-${MAJOR}-${MINOR})
      * Post-release version bump in the main branch, increment mm_minor_version.
      * Post-release version bump in the stable branch, increment mm_micro_version.
 
-10.2) For stable branch releases:
+9.2) For stable branch releases:
      * Post-release version bump, increment mm_micro_version.
 
 -------------------------------------------------------------------------------
@@ -76,4 +81,4 @@ The ModemManager releases are generated using the GNU autotools.
 *) Verifying the release signature requires the public key of the person who
    signed it, e.g.:
 
-    $ curl https://www.freedesktop.org/software/ModemManager/0x3CAD53398973FFFA.asc | gpg --import
+    $ curl https://www.freedesktop.org/software/ModemManager/0xAECE0239C6606AD5.asc | gpg --import