Use wordsplit to expand variables in strings.

* NEWS: Raise version number.
* configure.ac: Link wydawca.h to include/wydawca
Raise version number
* doc/wydawca.texi: Document changes.
* etc/wydawca.rc: Fix the syntax.
* grecs: Upgrace.
* include/wydawca/wydawca.h (wy_vlog): New proto.
(wy_log, wy_dbg): Format is const char *.
(wy_triplet_t): Change typedef.
(wy_metadef): Remove struct.
(wy_vardef): New struct.
(wy_triplet_expand_param)
(wy_expand_copy): New protos.
* modules/logstat/mod_logstat.c: Update.
* modules/mailutils/Makefile.am (AM_CPPFLAGS): Modify,
* modules/mailutils/mod_mailutils.c: Update.
* src/Makefile.am (wydawca_SOURCES): Remove meta.c
* src/dictionary.c: Fix comment.
* src/directive.c (directive_get_value): Triplet pointer is const.
* src/meta.c: Remove.
* src/timer.c: (timer_fill_meta)
(timer_free_meta): Remove.
* src/triplet.c: Use wordsplit for expansions.
* src/wydawca.c (wy_vlog): New function.
(wy_stat_expansion): New function.
* src/wydawca.h: Remove metadef protos.
* tests/etc/notify.rcin: Update variable reference syntax.

1 files changed, 56 insertions, 1 deletions

diff --git a/NEWS b/NEWS
index d99ce47..b73895b 100644
--- a/NEWS
+++ b/NEWS
@@ -1,7 +1,62 @@
-Wydawca NEWS -- history of user-visible changes. 2019-07-22
+Wydawca NEWS -- history of user-visible changes. 2019-07-24
 See the end of file for copying conditions.
 
 Please send Wydawca bug reports to <bug-wydawca@gnu.org.ua>.
+
+Version 3.0.90 (git)
+
+* Variable expansion syntax
+
+This release uses wordsplit v1.0-9-g7eaa3c4.  Normal shell like
+expansion is allowed.  This means that curly braces around variable
+names are optional and that the following forms are now allowed:
+
+${VARIABLE:-WORD}
+     "Use Default Values".  If VARIABLE is unset or null, the
+     expansion of WORD is substituted.  Otherwise, the value of
+     VARIABLE is substituted.
+
+${VARIABLE:=WORD}
+     "Assign Default Values".  If VARIABLE is unset or null, the
+     expansion of WORD is assigned to variable.  The value of
+     VARIABLE is then substituted.
+
+     The assigned value remains in effet during expansion of the
+     current string.
+
+${VARIABLE:?WORD}
+    "Display Error if Null or Unset".  If VARIABLE is null or
+    unset, the expansion of WORD (or a message to that effect if
+    WORD is not present) is output to the current logging channel.
+    Otherwise, the value of VARIABLE is substituted.
+
+${VARIABLE:+WORD}
+    "Use Alternate Value".  If VARIABLE is null or unset, nothing
+     is substituted, otherwise the expansion of WORD is
+     substituted.
+
+* Handling of undefined variables
+
+Attempt to expand undefined variable causes fatal error.  Use one of
+the advanced forms described above to handle such cases gracefully.
+
+* Variable names
+
+Several variable names have changed.  Names that contained dash,
+now use underscore instead.  These are:
+
+  Old name             Use this instead
+  -------------------  -------------------
+  stat:check-failures  stat:check_failures
+  dest-dir             dest_dir
+  source-dir           source_dir
+  user:real-name       user:real_name
+
+* $- is gone
+
+Trailing newlines are automatically removed from all variable
+expansions.  Consequently, the $- marker (delete to the end of line)
+has been removed.
 
 
 Version 3.0, 2019-07-22