Adding installIfNew.r example

[1beb]

Take a look, let me know what you think. I created a new file. It is essentially a copy of install2.r with some support for looking at installed.packages(). I added a warning when no packages will be installed but I'm not actually sure how that will be handled on passthrough.

[1beb]

Non trivial changes are here to L70-L77

[eddelbuettel]

Let me take a closer peek at it in the next few days.

First comment, confirmed from running after glancing at the code: warning() is noise. Maybe just message() or even cat() ?

edd@rob:~/git/littler/inst/examples(pr59/install_if_new)$ ./installIfNew.R RcppGSL
Warning message:
In install_packages2(pkgs = f, lib = lib, repos = if (isMatchingFile(f)) NULL else rep,  :
  All specified packages are already installed.
edd@rob:~/git/littler/inst/examples(pr59/install_if_new)$ 

We may want to simplify and remove pieces from install2.r we do not need, like the -e support. I forget what that was motivated by, once.

[eddelbuettel]

It is a pretty small change to install2.r. Do you think it could / should just be an additional toggle there?

[eddelbuettel]

@1beb Any follow-up comment? As small as it is, should it be over in install2.r ? Default behaviour as is, if a (new) flag (say, --skip-installed or something) is set it does what you added.

[1beb]

Sorry Dirk, I'm in transit will review this next week. I will program it as you prefer it. It's really not that hard. So specify what your preference is and I'll push an update.

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On Wed, May 9, 2018, 12:44 Dirk Eddelbuettel ***@***.***> wrote: @1beb <https://github.com/1beb> Any follow-up comment? As small as it is, should it be over in install2.r ? Default behaviour as is, if a (new) flag (say, --skip-installed or something) is set it does what you added. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#59 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAZv45SRNGlcB4F6_OTxMlf1m5Ze-FrXks5twzkFgaJpZM4T0UM_> .

[eddelbuettel]

In order to get on with life I am going to merge this, and then delete the new file, carrying the diff over to install2.r under an appropriate flag.

[1beb]

Thx. I'm in Mexico at a Bachelor party. There is no programming this week.

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On Sat, May 12, 2018, 08:15 Dirk Eddelbuettel ***@***.***> wrote: Merged #59 <#59>. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#59 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAZv4ygDnT0x9JaxgLUmqD9ZkKqpRCUYks5txu5ngaJpZM4T0UM_> .