Source: https://github.com/rmyorston/busybox-w32

Built on Fedora.

make config file for building busybox for use with EasyRSA included.

This binary is less than 50% of the size of the complete binary because all non-essential applets have been removed.

• EasyRSA 280KB verses busybox full 640KB.

Removed:

• Network and administration tools.
• Unicode support.
• All non-essential tools.

The list of supported applets can be found in busybox.txt, included in the archive.

For testing, the archive can be found here:
v3 https://github.com/OpenVPN/easy-rsa/blob/f1911468a3bd2340baa1ffd9357caee047eadff3/distro/dev/busybox-v3.7z
v4 https://github.com/OpenVPN/easy-rsa/blob/80f6f837099414ff618adc21d53d8cf5b2d4d503/distro/dev/busybox-v4.7z

Notes:

• busybox appears to be POSIX compliant.
• 7z format was chosen for maximum compression.
  Any preferred format is acceptable.
• This PR will not be merged, it is only for discussion.

You can save 30K (uncompressed) if you omit the embedded icons.

Yes, "pretty is a feature", but in this case it's probably not worth >10% the size of the binary.

--- ./configs/easyrsa_defconfig.orig	2023-02-08 09:24:50.000000000 +0000
+++ ./configs/easyrsa_defconfig	2023-02-08 09:29:14.000000000 +0000
@@ -47,10 +47,10 @@ CONFIG_FEATURE_PRNG_SHELL=y
 # CONFIG_FEATURE_PRNG_ISAAC is not set
 CONFIG_FEATURE_RESOURCES=y
 CONFIG_FEATURE_VERSIONINFO=y
-CONFIG_FEATURE_ICON=y
+# CONFIG_FEATURE_ICON is not set
 # CONFIG_FEATURE_ICON_ATERM is not set
 # CONFIG_FEATURE_ICON_STERM is not set
-CONFIG_FEATURE_ICON_ALL=y
+# CONFIG_FEATURE_ICON_ALL is not set
 # CONFIG_FEATURE_EURO is not set
 CONFIG_SKIP_ANSI_EMULATION_DEFAULT=2
 CONFIG_FEATURE_IMPROVED_COLOUR_MAPPING=y

@rmyorston Thank you for the tip!

I have been experimenting with menuconfig, I'll try this too.

Force push: v4, remove embedded icons, and [ and test.

Full unit-test using busybox.exe completed locally.

Closing this, possibly move to a feature branch.

Re-opening as a possible follow-up to: #1075

Follow-up set-to: #1076 #1077 #1080

@rmyorston #1077 , just a polite ping to put you on the radar.

I would like to credit your work.

Thanks for the heads up.

I would like to credit your work.

That would be appreciated. A mention in README-Windows.txt would be sufficient.

I suggest you also publicise the BusyBox configuration file you used and the version or commit of the source. This will in useful in case any bugs are identified.