Toit

I thought I had fixed it (and tested it a bit), but if it isn't working for you, I would be grateful for feedback on what's going wrong.

```
jag toit tool firmware --envelope=foo tool esptool
Command: [C:/Users/adam/.cache/jaguar/sdk/bin/../lib/toit/bin/esptool.exe]
Version: esptool.py v4.8.1
4.8.1
```
and
```
toit tool firmware --envelope=foo tool esptool
Command: [C:/Users/adam/AppData/Local/Programs/toit/bin/../tools/esptool.exe]
Version: esptool.py v4.8.1
4.8.1
```

and then
```
jag flash
Error: failed to probe chip type: failed to probe chip type: exec: "esptool.py": executable file not found in %PATH%:
PS Microsoft.PowerShell.Core\FileSystem::\\wsl.localhost\Ubuntu\home\adam\dev\lb\io\toit-envelopes>
```

Yes. clearly the command fails and falls back. We need to print the `err`.

right, yeah so issue in https://github.com/toitlang/jaguar/blob/main/cmd/jag/commands/util.go#L173-L188

```
toit tool firmware  --output-format json tool esptool -e unused
{"command":["C:/Users/adam/AppData/Local/Programs/toit/bin/../tools/esptool.exe"],"version":"esptool.py v4.8.1\r\n4.8.1\r\n"}
```

This is your own build of `jag`? Make sure you're not being burnt by JAG_TOIT_REPO_PATH.

Should still show the correct thing with `jag toit ...`.

```
toit tool firmware  --output-format json tool esptool -e unused --port COM14 chip-id

Error: Unknown option: --port
``` ?

As I said: we are hitting https://github.com/toitlang/jaguar/blob/3223101b6c26fee9eeaa17a105752f64287c8b2a/cmd/jag/commands/util.go#L193

So something went wrong when trying to find the path of the esptool.

Is this "unknown option" port the error that is liekly happeneing though?

Without the error message it's hard to figure out what exactly.

as I see `cmd := sdk.EspTool(ctx, "--port", port, "chip-id")` is what is being run, which I think results in the command above?

so adding a `println(err.Error()) ` is what we need to add to figure out why it's not working.

In the meantime you can work around it by using `--chip=esp32c6` (or whatever your chip is). Then it skips the probing.

Fix is out for review.
https://github.com/toitlang/jaguar/pull/649

I'm pretty confident this release finally fixes the probing issue.

Forgive me if this is very elementary but I'm missing it: is there a mechanism for copying objects? Like make one instance of a class and then make a copy that is a new instance?

No. That doesn't exist. 
Some classes provide their own copy methods.
For containers it's typically called `copy` and for other objects it's often `with` (and then optional parameters to modify some properties)

https://libs.toit.io/core/collections/class-Set#copy(0%2C0%2C0%2C)

https://libs.toit.io/core/time/class-TimeInfo#with(8%2C0%2C0%2Cday%2Cdst%2Ch%2Cm%2Cmonth%2Cns%2Cs%2Cyear)