Bootstrap scripts

The reference implementation is a single-file executable. A dk0 shell script (Unix) and a dk0.cmd Windows batch script are also available that bootstrap and run the single-file executable. They rely on a small set of external tools per platform; a different implementation may use different tools or none at all.

Windows

File	What
pwsh in PATH	enter-object interactive shell (optional; searched 1st)
powershell in PATH	enter-object interactive shell (optional; searched 2nd)
cmd in PATH	enter-object interactive shell (fallback; searched last)
powershell.exe in PATH	dk0.cmd batch script - for InvokeWebRequest (optional; searched 1st)
bitsadmin in PATH	dk0.cmd batch script - for download (fallback; searched last)
certutil in PATH	dk0.cmd batch script - verify sha256sums

macOS

File	What
/usr/bin/codesign	executables are locally signed when -e GLOB_PATTERN
/bin/sh	enter-object interactive shell unless SHELL env var set
/bin/sh	dk0 shell script
/usr/bin/shasum	dk0 shell script
/usr/bin/curl	dk0 shell script (optional; searched 1st)
/bin/curl	dk0 shell script (optional; searched 2nd)
/usr/bin/wget	dk0 shell script (optional; searched 3rd)
/bin/wget	dk0 shell script (fallback; searched last)
/usr/bin/mv	dk0 shell script (optional; searched 1st)
/bin/mv	dk0 shell script (fallback; searched last)
/usr/bin/rm	dk0 shell script (optional; searched 1st)
/bin/rm	dk0 shell script (fallback; searched last)
/usr/bin/uname	dk0 shell script (optional; searched 1st)
/bin/uname	dk0 shell script (fallback; searched last)
/usr/bin/awk	dk0 shell script - to parse sha256sums (optional; searched 1st)
/bin/awk	dk0 shell script (fallback; searched last)

Linux / BSDs / MSYS2 / Cygwin

File	What
/bin/sh	enter-object interactive shell unless SHELL env var set
/bin/sh	dk0 shell script
/usr/bin/shasum	dk0 shell script (optional; searched 1st)
/usr/bin/sha256sum	dk0 shell script (fallback; searched last)
/usr/bin/curl	dk0 shell script (optional; searched 1st)
/bin/curl	dk0 shell script (optional; searched 2nd)
/usr/bin/wget	dk0 shell script (optional; searched 3rd)
/bin/wget	dk0 shell script (fallback; searched last)
/usr/bin/mv	dk0 shell script (optional; searched 1st)
/bin/mv	dk0 shell script (fallback; searched last)
/usr/bin/rm	dk0 shell script (optional; searched 1st)
/bin/rm	dk0 shell script (fallback; searched last)
/usr/bin/uname	dk0 shell script (optional; searched 1st)
/bin/uname	dk0 shell script (fallback; searched last)
/usr/bin/awk	dk0 shell script - to parse sha256sums (optional; searched 1st)
/bin/awk	dk0 shell script (fallback; searched last)
/usr/bin/cygpath	dk0 shell script (optional)