core: Improve the echo and info meta commands of the arg parser

* src/argparse.c (handle_meta_echo): Substitue some vars.
(handle_meta_user): Factor some code out to ...
(assure_username): new.
--

Yeah, that is not really needed but might sometimes be helpful.

Signed-off-by: Werner Koch <wk@gnupg.org>

2 files changed, 10 insertions, 3 deletions

diff --git a/tests/etc/t-argparse.conf b/tests/etc/t-argparse.conf
index 4562c7c..863f74e 100644
--- a/tests/etc/t-argparse.conf
+++ b/tests/etc/t-argparse.conf
@@ -3,10 +3,17 @@
 # Options applied to all user's config files
 #verbose
 
-# The meta comman decho simply prints the argument.  With a hash
+
+# The meta command echo simply prints the argument.  With a hash
 # prefix it does not prepend the file name and line number.  For
 # future compatibility do not use doallar signs.
 [-echo Begin global config]
+
+[-echo use $${user} to echo the current user (${user})]
+[-echo use $${file} to echo the current file (${file})]
+[-echo use $${line} to echo the current line (${line})]
+[-echo use $${epoch} to echo a timestamp (${epoch})]
+
 [verbose]
 
 [user joy]
@@ -16,7 +23,7 @@
 
 # info is an alias for echo but only executed if a user secion is active.
 # For future compatibility do not use percent or dollar signs.
-[-info In user Joy]
+[-info In user Joy but real user id ${user}]
 
 [-verbose]
 [+force]
diff --git a/tests/t-argparse.conf b/tests/t-argparse.conf
index c689a63..f50712e 100644
--- a/tests/t-argparse.conf
+++ b/tests/t-argparse.conf
@@ -1,6 +1,6 @@
 # User test config file for t-argparse
 
-[-echo begin of user config]
+[-echo begin of user config (user=${user})]
 [+verbose]
 # Options applied to all user's config files
 echo