Missing curly braces when calling echo in Git Bash on Windows

[carlzhc]

When command line contains curly braces, the braces are removed before passing it to command.

Babashka v1.12.208 REPL.
Use :repl/quit or :repl/exit to quit the REPL.
Clojure rocks, Bash reaches.

user=> (babashka.process/shell "echo @{U}")
@U

It seems the issue only happens in Windows 10, Linux is fine.

[borkdude]

I don't have echo installed on Windows when running bb from powershell nor in cmd.exe but by shelling out to bb itself I don't get a problem:

user=> (p/shell "bb" "-e" (pr-str '(println "@{U}")))
@{U}

I can reproduce this with Git bash on Windows:

user=> (p/shell "echo" "@{U}")
@U

but

this is the same:

user=> (p/shell "bb" "-e" (pr-str '(println "@{U}")))
@{U}

This also prints normally:

(p/shell "cmd" "/c" "echo" "@{U}")

So.. my suspicion is that there's something weird with Git Bash's echo, but not sure what.

[borkdude]

When I add escapes before the curlies I do get the desired output on Git bash:

(p/shell echo "@\\{U\\}")

[borkdude]

Here's another direct ProcessBuilder invocation using JVM Clojure:

borkdude@DESKTOP-JN2UNTV MINGW64 ~
$ clj
Clojure 1.12.0
user=> (doto (java.lang.ProcessBuilder. ["echo" "@{U}"])
  (.inheritIO)
  (.start))
#object[java.lang.ProcessBuilder 0x7918c7f8 "java.lang.ProcessBuilder@7918c7f8"]
                                                                               ]

user=> @U

This shows that this problem isn't specific to babashka.process. I'll turn this issue into a Discussion for the moment.