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How to generate dependency file that can be used by gnu make?

4 messages · Peng Yu, Linlin Yan

Peng Yu
# 
gcc has options like -MM, which can generate the dependence files for
a C/C++ file that I can be used by gnu make. I'm wondering if there is
a tool that can generate dependence file for an R script.

For example, I have an R script test.R

#########test.R
load('input.RData')
save.image('output.RData')


I want to generate a dependence file like the following. Is there a
tool to do so?

output.RData:test.R input.RData
1 day later
Peng Yu
#
On Sun, Nov 15, 2009 at 8:45 PM, Peng Yu <pengyu.ut at gmail.com> wrote:
Is there a way to automatically generate the output files that depends
on an R script and the input files and sourced files that are depended
by an R script? I don't see this option in R. But I wish this can be
implemented in future version of R.
Linlin Yan
# 
I don't think this function is same as gcc's option -MM. Because gcc
checks pre-compile command #include, in which the filename can be
fetched definitely. But in your scenario, the filename may be from
some variables, which can not be determined by the R script only.
Maybe you can write a tool by yourself to parse the R syntax to
resolve your problem.
On Tue, Nov 17, 2009 at 11:51 AM, Peng Yu <pengyu.ut at gmail.com> wrote:
Peng Yu
# 
This may not easy to do, when the filename are not hard coded strings.
For example, the variable 'filename' is a vector of strings.

for (i in 1:length(filename)){
do something...
save(....,file=filename[i])
}
On Mon, Nov 16, 2009 at 11:33 PM, Linlin Yan <yanlinlin82 at gmail.com> wrote: