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authorLudovic Courtès <ludo@gnu.org>2015-05-25 22:52:41 +0200
committerLudovic Courtès <ludo@gnu.org>2015-05-25 22:52:41 +0200
commitdb030303b820297da23f8ce7101be88427eeef8d (patch)
tree471ad5271d7c026ebf5b698947a43c6d2df2e7c6 /doc
parent5f1087c48144e15d9e37d23b559017f9d7e326cd (diff)
downloadgnu-guix-db030303b820297da23f8ce7101be88427eeef8d.tar
gnu-guix-db030303b820297da23f8ce7101be88427eeef8d.tar.gz
guix system: Add '--on-error'.
* guix/ui.scm (load*): Add #:on-error parameter. [tag, error-string]: New variables. Wrap 'load' call in 'call-with-prompt'. Pass TAG to 'make-stack'. Honor ON-ERROR after 'report-load-error' call. (report-load-error): Change to not exit on error. Make private. * guix/scripts/system.scm (show-help, %options): Add --on-error. (guix-system): Use 'load*' and pass it #:on-error.
Diffstat (limited to 'doc')
-rw-r--r--doc/guix.texi19
1 files changed, 19 insertions, 0 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index a4aa1b67fa..a97436cc0c 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -5995,6 +5995,25 @@ For the @code{vm-image} and @code{disk-image} actions, create an image
of the given @var{size}. @var{size} may be a number of bytes, or it may
include a unit as a suffix (@pxref{Block size, size specifications,,
coreutils, GNU Coreutils}).
+
+@item --on-error=@var{strategy}
+Apply @var{strategy} when an error occurs when reading @var{file}.
+@var{strategy} may be one of the following:
+
+@table @code
+@item nothing-special
+Report the error concisely and exit. This is the default strategy.
+
+@item backtrace
+Likewise, but also display a backtrace.
+
+@item debug
+Report the error and enter Guile's debugger. From there, you can run
+commands such as @code{,bt} to get a backtrace, @code{,locals} to
+display local variable values, and more generally inspect the program's
+state. @xref{Debug Commands,,, guile, GNU Guile Reference Manual}, for
+a list of available debugging commands.
+@end table
@end table
Note that all the actions above, except @code{build} and @code{init},