{runtime.os} not being substituted in upload commandline for Sony SPRESENSE board

[mdwelsh]

Bug Report

I am unable to upload a sketch for the Sony SPRESENSE board on MacOS X. The error message suggests that arduino-cli is not properly translating {runtime.os} to macosx when it constructs the flash_writer command line.

This is with a trivial "Blink" sketch.

Current behavior

$ arduino-cli upload -p /dev/cu.SLAB_USBtoUART --fqbn SPRESENSE:spresense:spresense Blink -v

Waiting for upload port...
"/Users/mdw/Library/Arduino15/packages/SPRESENSE/tools/spresense-tools/2.0.2/flash_writer/{runtime.os}/flash_writer" -s -c "/dev/cu.SLAB_USBtoUART"  -d -n "/var/folders/bw/pw636xj977n1k9367knvlml80000gn/T/arduino-sketch-69767DD007917B413367753F903A19C4/Blink.ino.spk"
Error during Upload: uploading error: cannot execute upload tool: fork/exec /Users/mdw/Library/Arduino15/packages/SPRESENSE/tools/spresense-tools/2.0.2/flash_writer/{runtime.os}/flash_writer: no such file or directory

Expected behavior

The flash_writer program is found in:

/Users/mdw/Library/Arduino15/packages/SPRESENSE/tools/spresense-tools/2.0.2/flash_writer/macosx/flash_writer

That is, replacing {runtime.os} with macosx in the command line should do the trick. I am not sure why this is not happening automatically.

Environment

• CLI version (output of arduino-cli version): arduino-cli alpha Version: 0.16.0 Commit: c977a23 Date:

• OS and platform: MacOS X 10.14.6 on Macbook Pro 2018, with Sony SPRESENSE

[mdwelsh]

The platform.txt file contains this line:

tools.spresense-tools.cmd.path={path}/flash_writer/{runtime.os}/flash_writer

This core was installed in the IDE (not via arduino-cli) using the instructions here:
https://developer.sony.com/develop/spresense/docs/arduino_set_up_en.html

[mdwelsh]

Adding the line:

tools.spresense-tools.cmd.path.macosx={path}/flash_writer/macosx/flash_writer

to packages/SPRESENSE/hardware/spresense/2.0.2/platform.txt is a workaround, however, I don't understand why it's needed, as {runtime.os} expansion should, in principle, work here.

[mdwelsh]

I have confirmed this issue still exists in

arduino-cli alpha Version: nightly-20210225 Commit: b8c9e896 Date: 2021-02-25T01:32:05Z