Re: Parsing the output of the "installer" tool
Re: Parsing the output of the "installer" tool
- Subject: Re: Parsing the output of the "installer" tool
- From: Steven Lobo <email@hidden>
- Date: Tue, 29 Aug 2006 22:30:00 -0700
- Thread-topic: Parsing the output of the "installer" tool
Thanks Luke...
Regarding my first query, would it be a safe approach to parse out the
output of the "installer" command line tool and update my software updater's
progress UI and strings accordingly ? I am envisioning the scenario from the
point of view of a new future Apple OS release that could potentially
require me to provide an update for my software (e.g. say new features that
can be supported for that OS) via my software updater. In case I rely on the
installer tool's output for updating my software updater's user interface, I
would like to know if the approach of parsing out the command line
"installer" tool's output and updating the updater UI would work even then.
Or, is there any other safer approach that is recommended ?
Steven
On 8/29/06 10:39 AM, "Luke Bellandi" <email@hidden> wrote:
> Hi Steven,
>
> On Aug 28, 2006, at 10:01 PM, Steven Lobo wrote:
>
>> Hi:
>>
>> I provide a software update feature in my software UI that currently
>> checks
>> for updates from a server, downloads updates if necessary and
>> installs the
>> same. My update software is packaged as a Packagemaker package/
>> metapackage.
>> Once the package is downloaded, I execute the package using the
>> command line
>> "installer" tool from my software UI (via NSTask) similar to this....
>>
>> installer -pkg /My_Package_Source_Path -target
>> My_Package_Destination_Path
>> -verboseR
>>
>> The install status output that I receive is as follows
>>
>> installer: Package name is My Great App
>> installer: Upgrading at base path /
>> installer:PHASE:Preparing for installation
>> installer:PHASE:Preparing the Disk
>> installer:STATUS:Preparing Target Volume
>> installer:%0.010000
>> installer:PHASE:Preparing My Great App
>> installer:STATUS:
>> installer:PHASE:Installing My Great App
>> installer:STATUS:
>> installer:STATUS:Configuring Installation
>> installer:STATUS:Validating package
>> installer:STATUS:Writing files
>> installer:%0.295857
>> installer:STATUS:Writing package receipt
>> installer:%0.884000
>> installer:PHASE:Finishing Installation
>> installer:%0.002000
>> installer:STATUS:Finishing Installation
>> installer:%1.000000
>> installer:STATUS:
>> installer:PHASE:The software was successfully installed
>> installer: The upgrade was successful.
>>
>> I plan to asynchronously monitor this output using the NSFileHandle
>> API's,
>> parse out the "STATUS:", "PHASE:" and "%" values and accordingly
>> update a
>> progress bar in my updater UI. This works out pretty well since most
>> of the
>> output is also localized already by the command line tool.
>>
>> Queries:
>> --------
>> 1. Is parsing out the "installer" tool's output a recommended
>> approach or is
>> there a more reliable approach to handle this ? I could not find
>> specific
>> documentation regarding the output and am therefore unsure if such
>> installer
>> state parsing is recommended or and will be supported in future OS
>> releases?
>> 2. The install percentage value just before installation is finished
>> is
>> always "0.002000" (check above). Since this is not in sync with the
>> rest of
>> the percentage status provided, I reckon that this indicates some
>> other
>> status. What does this signify ?
>
> The percentages indicate percent complete for each phase. When the
> installer notifies you that it's on a new phase, you should reset your
> percent complete to 0%.
>
> - Luke
>
>> TIA
>>
>> Steven
>>
>>
>>
>> -----------------------------------------------
>> Robosoft Technologies - Come home to Technology
>>
>>
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