Set the path system on Mac?

I help with a plugin that uses some command line tools open source. The plugin comes with all the outbuildings grouped in a 'bin' directory, which works very well under Windows but Mac search the system path, when these programs are called. Mac users asked to install the files in/usr/bin, but now with "El Capitan", which is not possible. It also seems that the plugin cannot access anything installed in usr, even if it is in the system path.

"El Capitan" even before we discussed ways for the Mac version to behave as the version of Windows and use the files installed in the 'bin' directory of.

    if MAC_ENV then

        local exportPath = 'export PATH="'
        local toolsPath = LrPathUtils.child(_PLUGIN.path, 'bin"')
        local systemPath = ':$PATH'
        local searchPath = exportPath..toolsPath..systemPath
--        LrTasks.execute(searchPath) -- this doesn’t work

The script calls this dependency checking:

-- Check for Mac dependencies
function MLProcess.checkDependencies()
    return "exec which dcraw exiftool"
end

The only way it will work on "El Capitan" is so dcraw and exiftool are installed in/usr/bin. Some users are skilled enough to disable the Protection of the integrity of the system to install the tools but that shouldn't be necessary. Another solution is to start Lightroom since a shell script which sets the path for this session before launching LR. Here is an example:

LR.command

export PATH="/Library/Application Support/Adobe/Lightroom/Modules/cr2hdr.lrplugin/bin":$PATH
/Applications/Adobe\ Lightroom/Adobe\ Lightroom.app/Contents/MacOS/Adobe\ Lightroom

Of course, these are just workaround solutions - how the system configurable path? Is it still possible?

I found another way to do it without having to create a shell script. One of our programmers working on a lua module offered me an alternative. The script is a variable containing the call to invoke cr2hdr so that all the arguments of the command line for the path can be defined in the same variable. Here is the code:

if MAC_ENV then
    command = 'export PATH="'..LrPathUtils.child(_PLUGIN.path, 'bin"')..':${PATH} && '..command
end
result = LrTasks.execute(command)

These quotes which may appear irrelevant are important because the path names could include spaces.

Either way, it's for an interesting project called magic lantern. It is a program that runs on some models of Canon cameras. The plugin should work with a feature called double ISO. Basically it allows you to make two ISO images in square brackets which is then integrated into an HDR file in post processing. The Lightroom plugin is a front end for command line tools that do the job.

Tags: Photoshop Lightroom

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