tput error inside Docker

[Michael Steinbaugh]

Hi, I'm seeing this error pop up inside Docker images using shunit2 for unit tests:

tput: No value for $TERM and no -T specified
/usr/local/bin/shunit2: line 840: [: : integer expression expected

It seems like this issue has popped up for CI tests previously, as reported in #86 and #88.
This post also seems to be relevant.

I'm trying to set ARG TERM=xterm-256color inside my Dockerfile to see if this fixes the issue and will report back.

Any advice or ideas on how to handle this issue? Thanks!

[Kate Ward]

Can you try with the latest version from HEAD, and report back whether this error still appears?

[Michael Steinbaugh]

@kward Sure I'll try to test this out and get back to you

[William Desportes]

Hi @kward !
I have this error on my Debian package: https://salsa.debian.org/debian/shunit2/-/jobs/3587857#L672

It's because tput is missing. It prevents the new version to enter debian as it breaks most of the projects using shunit2.
See: https://tracker.debian.org/pkg/shunit2

I am going to craft a patch for this, can you also have a look ?

[William Desportes]

Edit: tput exists but it says tput: unknown terminal "unknown"

[William Desportes]

See: https://opensource.apple.com/source/ncurses/ncurses-7/ncurses/progs/tput.c.auto.html

I did some debug

echo "colors 1: $(${SHUNIT_CMD_TPUT} colors)"
echo "colors 2: $(${SHUNIT_CMD_TPUT} colors 2>/dev/null)"
  if command [ $? -eq 0 ]; then
    echo "c: $?"
  else
    echo "cc: 16"
  fi

${SHUNIT_CMD_TPUT} colors 2>/dev/null
echo "c: $?"

${SHUNIT_CMD_TPUT} colors
echo "c: $?"

tput: No value for $TERM and no -T specified
colors 1: 
colors 2: 
c: 0
c: 2
tput: No value for $TERM and no -T specified
c: 2

The fix:

From: William Desportes <[e-mail]>
Date: Mon, 28 Nov 2022 15:42:19 +0100
Subject: Fix error with tput when $TERM is not set

Origin: vendor
Forwarded: https://github.com/kward/shunit2/issues/134
---
 shunit2 | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/shunit2 b/shunit2
index 6239683..b9b4603 100755
--- a/shunit2
+++ b/shunit2
@@ -1027,6 +1027,12 @@ _shunit_configureColor() {
 
 # colors returns the number of supported colors for the TERM.
 _shunit_colors() {
+  # Avoid: tput: No value for $TERM and no -T specified
+  if command [ -z "${TERM:-}" ]; then
+    echo 16
+    return
+  fi
+
   _shunit_tput_=`${SHUNIT_CMD_TPUT} colors 2>/dev/null`
   if command [ $? -eq 0 ]; then
     echo "${_shunit_tput_}"