Here the general (perhaps silly question) first: Is it possible for a
script to find out if it was sourced by another script or run
directly?
Here a small example with two scripts:
# script A
print ("This is script A")
# script B
source("C:/scriptA.R")
print ("This is script B")
I would like to modify script A in a way so that it only outputs 'This
is script A' if it was called directly, but keeps quiet in the other
case.
In addition to that, is it possible to access the stack of script
calls from the environment?
Ralf
?sys.call ## and friends. -- Bert On Wed, Oct 6, 2010 at 8:49 AM, Ralf B <ralf.bierig at gmail.com> wrote:> Here the general (perhaps silly question) first: Is it possible for a > script to find out if it was sourced by another script or run > directly? > > Here a small example with two scripts: > > # script A > print ("This is script A") > > # script B > source("C:/scriptA.R") > print ("This is script B") > > I would like to modify script A in a way so that it only outputs 'This > is script A' if it was called directly, but keeps quiet in the other > case. > > In addition to that, is it possible to access the stack of script > calls from the environment? > > Ralf > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >-- Bert Gunter Genentech Nonclinical Biostatistics
See findSourceTraceback() in the R.utils package. /Henrik On Wed, Oct 6, 2010 at 8:49 AM, Ralf B <ralf.bierig at gmail.com> wrote:> Here the general (perhaps silly question) first: Is it possible for a > script to find out if it was sourced by another script or run > directly? > > Here a small example with two scripts: > > # script A > print ("This is script A") > > # script B > source("C:/scriptA.R") > print ("This is script B") > > I would like to modify script A in a way so that it only outputs 'This > is script A' if it was called directly, but keeps quiet in the other > case. > > In addition to that, is it possible to access the stack of script > calls from the environment? > > Ralf > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >
Over the years I've seen lots of requests concerning how to conveniently call scripts from other scripts. The S (R & S+) language is oriented towards functions, not scripts (or macros), and many of the requests are for things easy to do in functions (or packages of functions) but not in scripts. Some would be easier if one used a package of scripts (built with the usual R package building tools). I'd like to know from people who do this sort of thing what pushes them toward using sets of scripts instead of functions. I can think of several possible reasons but would like to hear from people who actually do this sort of thing. E.g., is the clarity and concreteness of a script the important thing? Is it difficult to make a package of functions? Is it that people are used to another language where scripts or macros are the preferred way to go? Or are other reasons? Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com> -----Original Message----- > From: r-help-bounces at r-project.org > [mailto:r-help-bounces at r-project.org] On Behalf Of Ralf B > Sent: Wednesday, October 06, 2010 8:50 AM > To: r-help Mailing List > Subject: [R] Source awareness? > > Here the general (perhaps silly question) first: Is it possible for a > script to find out if it was sourced by another script or run > directly? > > Here a small example with two scripts: > > # script A > print ("This is script A") > > # script B > source("C:/scriptA.R") > print ("This is script B") > > I would like to modify script A in a way so that it only outputs 'This > is script A' if it was called directly, but keeps quiet in the other > case. > > In addition to that, is it possible to access the stack of script > calls from the environment? > > Ralf > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >