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Manual:4.3 Guile Scripting: Show to a layman that Guile can invoke shell commands, which are common in bash scripts. |
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Mon, 9 May 2016 18:48:26 -0400 |
In §4.3 (Guile Scripting) please mention §7.2.7 (Processes), or at
least the system/system* and open-pipe procedures. Maybe include an
example of a guile script invoking shell commands, as is common in
bash. As a layman, the manual's scripting section left me unsure
whether Guile could easily replace my typical bash scripts, and I
needed further help from Wingo on <irc://irc.freenode.net/guile>.
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Re: bug#23500: Manual:4.3 Guile Scripting: Show to a layman that Guile can invoke shell commands, which are common in bash scripts. |
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Tue, 28 Feb 2017 16:23:45 +0100 |
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Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux) |
On Tue 10 May 2016 00:48, Evan Davis <address@hidden> writes:
> In §4.3 (Guile Scripting) please mention §7.2.7 (Processes), or at
> least the system/system* and open-pipe procedures. Maybe include an
> example of a guile script invoking shell commands, as is common in
> bash. As a layman, the manual's scripting section left me unsure
> whether Guile could easily replace my typical bash scripts, and I
> needed further help from Wingo on <irc://irc.freenode.net/guile>.
Tx for the report. Added this text to the end of the section:
Finally, seasoned scripters are probably missing a mention of
subprocesses. In Bash, for example, most shell scripts run other
programs like @code{sed} or the like to do the actual work.
In Guile it's often possible get everything done within Guile itself, so
do give that a try first. But if you just need to run a program and
wait for it to finish, use @code{system*}. If you need to run a
sub-program and capture its output, or give it input, use
@code{open-pipe}. @xref{Processes}, and @xref{Pipes}, for more
information.
Andy
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