If you know the environment variables you want to set, just use /usr/bin/env.
(that’s it’s raison d’être):
- Instead of executing:
path/to/script args
- Execute:
/usr/bin/env PYTHONPATH=… PYTHONHOME=... path/to/script args
Or you can use posix_spawn to do the launching, which allows you to specify
environment variables as well
Or, if posix_spawn isn’t available, you can fork() and use execle()
Or if execle() isn’t available, you can fork(), change the environment in your
child process and then use plain-old exec()
> On Dec 16, 2015, at 14:29, Rick Mann <rm...@latencyzero.com> wrote:
>
> Sorry, I didn't specify enough constraints in my original post.
>
> - The code that calls the external scripts has to be cross-platform, and run
> on linux as well as OS X. So, no NSTask.
> - I can modify the code that calls the scripts, and I can use OS X-only APIs
> to set up a global environment (for processes launched by my app) if that
> sort of thing is possible.
> - I don't want to make the user modify things like launchd config or /etc.
> They can install required dependencies (like certain Python modules), but
> that's about it. I'd love to find a way to package those in the app bundle,
> too.
>
> I'm thinking the best thing to do is pass in paths and an environment string
> to be used in the system() call (e.g., invoke it as "export PYTHONPATH=...;
> export PYTHONHOME=...; path/to/script args"). Maybe I can even leverage that
> to let me put the requisite python modules in the app bundle...
>
>> On Dec 16, 2015, at 11:07 , Paul Scott <psc...@skycoast.us> wrote:
>>
>> Sorry, I messed up the script. It should have been this:
>>
>> set vars to { ¬
>> {name:"ANT_HOME", value:"/usr/local/apache-ant-1.9.6"}, ¬
>> {name:"CATALINA_HOME",
>> value:"/Users/pscott/Projects/apache-tomcat-8.0.24"}, ¬
>> {name:"LAUNCHD_SCRIPT", value:"/Users/pscott/bin/logon_as"}, ¬
>> {done:true} ¬
>> }
>> repeat with i from 1 to (count of vars) - 1
>> do shell script ¬
>> "/bin/launchctl setenv " & name of item i of vars & ¬
>> " " & value of item i of vars
>> end repeat
>>
>> Paul
>>
>>> By the way, you could also use this AppleScript, saved as an application,
>>> and run automatically via the System Preferences -> Users & Groups ->
>>> Current User -> Login Items configuration.
>>>
>>> set vars to { ¬
>>> { name:"ANT_HOME", value:"/usr/local/apache-ant-1.9.6" }, ¬
>>> { name:"CATALINA_HOME", value:”/usr/local/apache-tomcat-8.0.24" }, ¬
>>> { done: true } ¬
>>> }
>>> repeat with i from 1 to count of vars - 1
>>> do shell script "/bin/launchctl " ¬
>>> & name of item i of vars & " " ¬
>>> & value of item 1 of vars
>>> end repeat
>>>
>>> That is much easier to set up, but has the disadvantage of bouncing the
>>> application icon in the Dock momentarily at login. The launchd mechanism is
>>> silent, and seems to complete a tad bit sooner.
>>>
>>> Paul
>>>
>>>> On Dec 16, 2015, at 15:47, Rick Mann <rm...@latencyzero.com> wrote:
>>>>
>>>>> I'm working on an OS X app that unfortunately has to call a series of
>>>>> bash and python scripts for part of the processing it does. I was able to
>>>>> include the scripts in my app's bundle, and invoke them there, but the
>>>>> environment is different when launched via my app than when launched on
>>>>> the command line. How can I best control the environment used when
>>>>> executing external scripts?
>>>>>
>>>>> --
>>>>> Rick Mann
>>>>> rm...@latencyzero.com
>>>>
>>>>
>>>> If you want to have specific environment variables set for all apps
>>>> launched regardless of how they were launched, you can use the launchd
>>>> mechanism, which is compatible with all the latest Mac OS X releases.
>>>>
>>>> You can put this file in ~/Library/LaunchAgents/local.launchdrc.plist
>>>>
>>>> <?xml version="1.0" encoding="UTF-8"?>
>>>> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN"
>>>> "http://www.apple.com/DTDs/PropertyList-1.0.dtd";>
>>>> <plist version="1.0">
>>>> <dict>
>>>> <key>Label</key>
>>>> <string>local.launchdrc</string>
>>>> <key>Disabled</key>
>>>> <false/>
>>>> <key>RunAtLoad</key>
>>>> <true/>
>>>> <key>ProcessType</key>
>>>> <string>Background</string>
>>>> <key>ProgramArguments</key>
>>>> <array>
>>>> <string>/Users/yourusername/.launchdrc</string>
>>>> </array>
>>>> <key>StandardErrorPath</key>
>>>> <string>/dev/null</string>
>>>> <key>StandardOutPath</key>
>>>> <string>/dev/null</string>
>>>> </dict>
>>>> </plist>
>>>>
>>>> Then, create ~/.launchdrc (chmod 755) that looks something like this:
>>>>
>>>> #!/bin/sh
>>>> launchctl setenv ANT_HOME "/usr/local/apache-ant-1.9.6"
>>>> launchctl setenv CATALINA_HOME “/usr/local/apache-tomcat-8.0.24”
>>>>
>>>> Where each environment variable you want available to all launched apps is
>>>> listed. Add variables as needed. This will set up an environment for the
>>>> user at login time that will get picked up by all launched apps, whether
>>>> run from the command line or launched via Finder.
>>>>
>>>> This replaces the old ~/.MacOSX mechanism where you could set environment
>>>> variables at login.
>>>
>
>
> --
> Rick Mann
> rm...@latencyzero.com <mailto:rm...@latencyzero.com>
>
>
>
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