[self-interest] unixGlobals os command:IfFail: vs. command:Executing:IfFail:
mail at russell-allen.com
Wed Oct 12 06:39:23 UTC 2016
I wouldn’t recommend reading the actual .self files. They were created by the Transporter and aren’t particularly human friendly. It is much easier to work within the UI.
That said, if I am in the UI and type command:Executing:IfFail: in to a shell, highlight and right click it, and choose ‘Implementors’, I see that the method has a comment which reads:
Execute cmd as a shell command.
If it fails, see if aFileName exists somewhere
in $PATH. If not, prompt the user and try again.
And if I right click again on the name and choose “Senders” I see that there is one sender: readUsingImageMagick: fileName Type: type which uses it to check that the ‘convert’ command line app is present.
> On 11 Oct. 2016, at 11:16 pm, Xin Wang dram.wang at gmail.com [self-interest] <self-interest at yahoogroups.com> wrote:
> Hi all,
> When reading code in `objects/core/unix.self`, I can not figure out what's purpose of `command:Executing:IfFail:`. Could anyone give me a hint?
> Xin Wang
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