Escaped quotation mark not handled properly

[d4h0]

The following:

let foobar = "foo bar";
xshell::cmd!("ls \"{foobar}\"");

fails with:

error[E0765]: unterminated double quote string
  --> websites/print_css/src/main.rs:90:29
   |
90 | ...                   xshell::cmd!("ls \"{foobar}\"");
   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Adding a space after the last escaped quotation mark works:

let foobar = "foo bar";
xshell::cmd!("ls \"{foobar}\" ");

[d4h0]

I also just found out, that escaped quotation marks are not handled properly, when a command is executed.

I believe these both issues are related to each other, so I'll not create a new issue for this (but let me know if that would make more sense).

The following:

xshell::cmd!("echo \"foo\" ").run()?

prints:

$ echo "foo"
"foo"

But echo "foo" prints foo without quotation marks.

So it seems, xshell really is executing echo "\"foo\"" above.

As far as I can see, currently it's not possible to execute a command like ls "foo bar", where foo bar is a directory with a space in it. At least, if part of foo bar comes from a variable (otherwise ls 'foo bar' could be used, I believe. However, variables are not interpolated within single quotation marks).

The following is probably a better demonstration:

let foo = "foo bar"
xshell::cmd!("echo \"foo bar/{foo}\" ").run()?

which prints:

$ echo "foo "bar/foo bar\""
"foo bar/foo bar"