Both options have equal meaning.

"-target:-" is used as input for zproject

and

"-topdir:.. -zproject:1" is equally used as input for one of zproto's scripts.

2016-04-25 16:53 GMT+02:00 Osiris Pedroso <opedroso@gmail.com>:
Thanks Kevin, very informative.

On Q1, I believe you answered was "-target:-" means.

What does the cmd line option "-zproject:1" mean on the line:
```
    cd $(srcdir)/src; gsl -topdir:.. -zproject:1 -q sockopts.xml
```


On Mon, Apr 25, 2016 at 9:29 AM Kevin Sapper <kevinsapper88@gmail.com> wrote:
Q1:
With a minus in the gsl command you can set or override an attribute of project e.g. `project.topdir` or `project.target`.

The snippet from Makemodule.am will re-generate all zproto models. As zproto does generate headers for its models which might conflict with an zproject api, zproject will be called with target "-" which means no target. Hence only the C api will be re-generated overriding unwanted zproto headers.

Q2:
No, `gsl project.xml` is the correct command. You'll use `make code` to refresh zproto models.

Q3:
No, changes are applied gradually downstream there is no pressure to do it right away. If there was a critical bug a mail to the mailing might be appropriate though.


2016-04-25 14:47 GMT+02:00 Osiris Pedroso <opedroso@gmail.com>:
Up till now, I thought that the following command was what regenerated the code for CZMQ project (or any other project using GSL code generation for that matter):
```
root@OPLIN:~/git/czmq# gsl project.xml
```

But I came across the contents of CZMQ's Makemodule.am, which has this rule in it (similar rule exist in ZYRE and MALAMUTE):
```
# Produce generated code from models in the src directory
code:
cd $(srcdir)/src; gsl -topdir:.. -zproject:1 -q sockopts.xml
cd $(srcdir)/src; gsl -topdir:.. -zproject:1 -q zgossip.xml
cd $(srcdir)/src; gsl -topdir:.. -zproject:1 -q zgossip_msg.xml
cd $(srcdir); gsl -target:- project.xml
```

**Question #1**: What does the GSL command line options "-zproject:1" and "-target:-" mean?
I looked in GSL's README.md and the information is not there. The word "zproject" is nowhere in the gsl sources...
```
Options currently recognised by GSL are:

* -a   argument: Pass arguments following filename to GSL script
* -q   quiet:    suppress routine messages
* -p   parallel: process files in parallel
* -s:n size:n    set script cache size - default is 1000000
* -h   help:     show command-line summary
* -v   version:  show full version information
```
**Question#2**: So, if one wants to apply GSL & ZPROJECT latest changes, is the correct approach to "make code" to get all modules regenerated for each of these projects then?

**Question #3**: If a contributor makes a change to a **.gsl** file, is he expected to also regen all downstream projects affected by those changes and PR them as well? What is the correct etiquette here?



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