e2e spec failures with unexpected stty: standard input CLI output

[SpComb]

Several e2e specs involving kontena * list commands (using tty-table -> tty-screen?) are failing when run in the Vagrant/docker-compose e2e spec environment:

  1) complete master names for master use
     Failure/Error: expect(rows).to include master_name unless master_name == current_master_name
       expected [] to include "stty: standard input"
     # ./spec/features/completer/completer_spec.rb:63:in `block (4 levels) in <top (required)>'
     # ./spec/features/completer/completer_spec.rb:62:in `each'
     # ./spec/features/completer/completer_spec.rb:62:in `block (3 levels) in <top (required)>'

  2) complete master names can complete master names for master rm
     Failure/Error: expect(rows).to include master_name
       expected ["compose-e2e"] to include "stty: standard input"
     # ./spec/features/completer/completer_spec.rb:72:in `block (4 levels) in <top (required)>'
     # ./spec/features/completer/completer_spec.rb:71:in `each'
     # ./spec/features/completer/completer_spec.rb:71:in `block (3 levels) in <top (required)>'

  3) complete master queries with current master set can complete node names
     Failure/Error: expect(rows).to include node_name
       expected ["localhost"] to include "stty: standard input"
     # ./spec/features/completer/completer_spec.rb:98:in `block (5 levels) in <top (required)>'
     # ./spec/features/completer/completer_spec.rb:97:in `each'
     # ./spec/features/completer/completer_spec.rb:97:in `block (4 levels) in <top (required)>'

  4) external-registry ls when not empty returns a list
     Failure/Error: expect(k.out.lines.first).to match(/NAME/)
     
       expected "stty: standard input\r\n" to match /NAME/
       Diff:
       @@ -1,2 +1,2 @@
       -/NAME/
       +stty: standard input
       
     # ./spec/features/external_registry/list_spec.rb:33:in `block (3 levels) in <top (required)>'

  5) external-registry ls when not empty -q outputs the registry name
     Failure/Error: expect(k.out.strip).to eq 'registry.domain.com'
     
       expected: "registry.domain.com"
            got: "stty: standard input\r\nregistry.domain.com"
     
       (compared using ==)
     
       Diff:
       @@ -1,2 +1,3 @@
       +stty: standard input
        registry.domain.com
       
     # ./spec/features/external_registry/list_spec.rb:44:in `block (4 levels) in <top (required)>'

  22) volume list --quiet lists volume names
      Failure/Error: expect(k.out.lines.sort.map(&:chomp)).to eq ["testVol", "testVol2"]
      
        expected: ["testVol", "testVol2"]
             got: ["stty: standard input", "testVol", "testVol2"]
      
        (compared using ==)
      # ./spec/features/volume/list_spec.rb:27:in `block (3 levels) in <top (required)>'

[SpComb]

Confirm that this is some combination of alpine Linux + rspec + kommando that's causing stty to output that to stderr:

  1) stty outputs size
     Failure/Error: expect(k.out).to match /\d+ \d+/
     
       expected "execve(\"/bin/stty\", [\"stty\", \"size\"], [/* 24 vars */]) = 0\r\narch_prctl(ARCH_SET_FS, 0x7f5b92...andard input\r\n)  = 21\r\nexit_group(0)                           = ?\r\n+++ exited with 0 +++\r\n" to match /\d+ \d+/
       Diff:
       @@ -1,2 +1,13 @@
       -/\d+ \d+/
       +execve("/bin/stty", ["stty", "size"], [/* 24 vars */]) = 0
       +arch_prctl(ARCH_SET_FS, 0x7f5b927e8b48) = 0
       +set_tid_address(0x7f5b927e8b80)         = 29
       +mprotect(0x7f5b927e5000, 4096, PROT_READ) = 0
       +mprotect(0x55a34ec87000, 16384, PROT_READ) = 0
       +getuid()                                = 0
       +ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0
       +ioctl(0, TIOCGWINSZ, {ws_row=0, ws_col=0, ws_xpixel=0, ws_ypixel=0}) = 0
       +write(2, "stty: standard input\n", 21stty: standard input
       +)  = 21
       +exit_group(0)                           = ?
       ++++ exited with 0 +++
       
     # ./spec/test.rb:4:in `block (2 levels) in <top (required)>'

On Ubuntu

This does not happen on Ubuntu Linux with glibc:

stty
execve("/bin/stty", ["stty", "size"], [/* 80 vars */]) = 0
<snip>
ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TIOCGWINSZ, {ws_row=0, ws_col=0, ws_xpixel=0, ws_ypixel=0}) = 0
ioctl(0, TIOCGWINSZ, {ws_row=0, ws_col=0, ws_xpixel=0, ws_ypixel=0}) = 0
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 23), ...}) = 0
write(1, "0 0\n", 40 0
)                    = 4
close(1)                                = 0
close(2)                                = 0
exit_group(0)                           = ?
+++ exited with 0 +++
  outputs size when run with kommando

[SpComb]

Reported as an issue in tty-screen, I think it should be suppressing the stderr output from stty in this case: piotrmurach/tty-screen#6

[kke]

piotrmurach/tty-screen#6 is solved so this should be fixable

[SpComb]

It only happens when running the specs in an alpine container, and I've stopped doing that for other reasons since.

Wouldn't hurt to update the CLI deps and then get this closed.