Providing an option to mention tempDirectory instead of relying on tmp directory provided by os.TempDir

[pckvcode]

What would you like to be added:
Providing an option to mention tempDirectory instead of relying on tmp directory provided by os.TempDir when GetImage

stereoscope/client.go

Line 69 in e6d086e

func GetImage(ctx context.Context, imgStr string, options ...Option) (*image.Image, error) {

Why is this needed:
We had a requirement where a customer wants to mention tempDirectory to be used by stereoscope while getting a docker image.

Additional context:

I examined the Stereoscope code to see if we could set a custom tempDir, but currently, that option isn’t available.

Here we are using global variable rootTempDirGenerator and not exposed to change.

stereoscope/client.go

Line 19 in e6d086e

var rootTempDirGenerator = file.NewTempDirGenerator("stereoscope")

Can we provide an option to update rootLocation in TempDirGenerator

stereoscope/pkg/file/temp_dir_generator.go

Line 12 in e6d086e

rootLocation string

[willmurphyscode]

Hi @pckvcode thanks for the request! This is an enhancement we'd be happy to see.

In the meantime os.TempDir respects the usual environment variables for choosing the temp directory, e.g. TMPDIR on mac and Linux, so this might help your use case.

[rezmoss]

@willmurphyscode can I work on this