This is to support the non-interactive use case of setting a
`FileDownloadTarget` and passing auto_remove and not caring if the target
file exists or not.
An alternative to adding the attribute to `FileDownloadTarget` and
having set_target pull it out would be to add a new param to `fetch()`
and `set_target()`. But it would only be used for one target type
anyway.
Based on the gm4-polyfill.js script from the greasemonkey devs. But not
the same because that script doesn't work for us for a couple of
reasons:
* It assumes all GM_* functions are attributes of `this` which in
this case is the global window object. Which breaks it out of our iife.
It is possible to change what `this` is within the iife but then we
would have to do something weird to ensure the functions were available
with the leading `this.`. And I don't think user javascripts tend to
call GM functions like that anyway, that polyfill script is just making
weird assumptions and then claiming it'll work for "any user script
engine".
* It tries to provide implementations of GM_registerMenuCommand and
GM_getResource text which do unexpected thins or implement a circular
dependency on the new version, respectively.
The greasemonkey spec states that user scripts should be able to put the URL
of a javascript source as the value of an `@require` key and expect to have
that script available in its scope. This commit supports deferring a user
script from being available until it's required scripts are downloaded,
downloading the scripts and prepending them onto the userscripts code before
placing it all in an iffe.
TODO:
* should I be saving the scripts somewhere else? Maybe the cache dir?
The are just going to data/greasemonkey/requires/ atm.
When min_chars is nonzero, if the first command that opens the
completion has < min_chars on the word under the cursor, it triggers a
check for a condition where last_cursor_pos is None.
By setting last_cursor_pos=-1 we ensure that the completer always
updates the first time it is opened, and that there is never a check
against None.
This adds a test for the min_chars feature.
Resolves#3635.
shellcheck recently added SC2330 checking for this. "which" is non-standard, and
not guaranteed by POSIX to have a meaningful exit status, while "command -v" is
specified by POSIX: https://stackoverflow.com/q/592620
