CMake: Translations: Add support for shell scripts

Rework the arguments to apt_add_translation_domain so a user
can specify TARGETS and SCRIPTS, the latter being Shell scripts.

For each language (TARGETS being C++, SCRIPTS being Shell), a separate
template is generated via xgettext. Those templates are then merged
together by using msgcomm. In case there are no Shell scripts in
the translation domain, msgcomm will receive /dev/null instead of
a shell translation template.

This also reintroduces line numbers, as msgcomm would otherwise
re-order the merged files not only by filename, but also by message
string. It's unclear why it does that, it could just leave strings
within a file alone.

In contrast to the old build system, we use xgettext for shell scripts
instead of bash --dump-strings, as it's just easier to use the same
tool for everything. We also create valid headers.

1 files changed, 24 insertions, 18 deletions

diff --git a/po/CMakeLists.txt b/po/CMakeLists.txt
index dc3622156..c7dfcb0fb 100644
--- a/po/CMakeLists.txt
+++ b/po/CMakeLists.txt
@@ -1,22 +1,28 @@
-apt_add_translation_domain(libapt-pkg${APT_PKG_MAJOR} apt-pkg)
-
-apt_add_translation_domain(apt              # Domain
-                           apt apt-cache apt-get apt-config apt-cdrom
-                           apt-helper apt-mark
-                           apt-private
-                           # Methods
-                           file copy store gpgv cdrom http https ftp rred rsh
-                           mirror
+apt_add_translation_domain(
+    DOMAIN libapt-pkg${APT_PKG_MAJOR}
+    TARGETS apt-pkg
 )
 
+apt_add_translation_domain(
+    DOMAIN apt
+    TARGETS apt apt-cache apt-get apt-config apt-cdrom apt-helper apt-mark
+            apt-private
+            # Methods
+            file copy store gpgv cdrom http https ftp rred rsh mirror
+    SCRIPTS ../dselect/install ../dselect/update
+)
 
-apt_add_translation_domain(apt-utils        # Domain
-                           apt-sortpkgs
-                           apt-extracttemplates
-                           apt-internal-solver
-                           apt-dump-solver
-                           apt-internal-planner
-                           apt-ftparchive)
+apt_add_translation_domain(
+    DOMAIN apt-utils
+    TARGETS apt-sortpkgs
+            apt-extracttemplates
+            apt-internal-solver
+            apt-dump-solver
+            apt-internal-planner
+            apt-ftparchive
+)
 
-# Add the translations for libapt-inst, and set the translation domain.
-apt_add_translation_domain(libapt-inst${APT_INST_MAJOR} apt-inst)
+apt_add_translation_domain(
+    DOMAIN libapt-inst${APT_INST_MAJOR}
+    TARGETS apt-inst
+)