.github/workflows/testsuite.yml - switch from secrets to vars

We have been using secrets to store boolean variables. This results
in our CI output being annoyingly corrupted by the security eliding.

Github now supports "variables" as well as secrets, which are not
elided in CI output. So switch our test framework controls to use
the variable. Note the EXTENDED_TESTING variable was switched from
to DO_EXTENDED_TESTING so that we can have both the EXTENDED_TESTING
/secret/ and the new DO_EXTENDED_TESTING variable available at the
same time as this commit is processed.

Fixes #20843

.github/workflows/testsuite.yml

@@ -9,8 +9,8 @@
 # When actions are enabled then it will - by default - run the 'Sanity Check' job.
 #
 # Testing other build configurations is controlled by the 'Secrets' configured
-# in 'Settings' -> 'Secrets' -> 'Actions' -> 'Repository Secrets':
-#   - EXTENDED_TESTING: when this secret exists and is set to a true value then
+# in 'Settings' -> 'Secrets and Variables' -> 'Actions' -> 'Variables':
+#   - DO_EXTENDED_TESTING: when this var exists and is set to a true value then
 #     all build configurations are tested;
 #   - CI_SKIP_SANITY: if set to a true value then most of the 'Sanity Check' job is skipped;
 #   - CI_FORCE_LINUX: if set to a true value: run the 'linux' job;
@@ -33,18 +33,11 @@
 #      * string containing only zeroes (i.e. '0', '0000')
 #      * string containing only spaces and zeroes (i.e. '0  0 0 0')
 #
-# When setting a value it's best to set a long and complex value
-# since GitHub will mask the secrets in the output. Which means if you
-# set (for example) EXTENDED_TESTING to 1 then all occurrences of '1'
-# are replaced with '*'. (e.g. `s/1/*/g;`). So it's recommended to set
-# something that is unlikely to occur in the job(/build/test) output
-# (for example: '111111111111111111', 'Rumpelstiltskin', ...).
-#
 # Example: if you only want to run tests on cygwin then you can set:
-#   - EXTENDED_TESTING=00000000000000000000000000000000000000
-#   - CI_SKIP_SANITY=1111111111111111111111111111111111111111
-#   - CI_FORCE_CYGWIN=111111111111111111111111111111111111111
-#   - (and all other CI_FORCE_... secrets to 0000000000000000)
+#   - DO_EXTENDED_TESTING=0
+#   - CI_SKIP_SANITY=1
+#   - CI_FORCE_CYGWIN=1
+#   - (and all other CI_FORCE_... vars to 0)
 #
 
 name: testsuite
@@ -117,13 +110,23 @@ jobs:
   # "linux-i386" tests -Uusethreads without -DDEBUGGING
   # All builds in the "linux" matrix test with -DDEBUGGING
   #
-  # "sanity_check" sets `fetch-depth: 0` so that it does a git clone with full
-  # history, and hence can run t/porting/cmp_version.t etc
-  # The git-related tests require full history, but we only need to run them
-  # once (they aren't platform specific).
-  # Hence leave the others with the default setting (1), which performs a
-  # shallow clone. In these shallow checkouts, the git related porting tests
-  # skip (or rapidly pass), but they won't fail spuriously.
+  # "sanity_check" sets `fetch-depth: 0` so that it does a git clone
+  # with full history, and hence can run t/porting/cmp_version.t etc
+  #
+  # The git-related tests require full history, but we only need to run
+  # them once (they aren't platform specific).  Hence leave the others
+  # with the default setting (1), which performs a shallow clone. In
+  # these shallow checkouts, the git related porting tests skip (or
+  # rapidly pass), but they won't fail spuriously.
+  #
+  # TODO - Now that we do not use secrets and instead use vars for the
+  # control of which tests we run (due to the way secrets are elided
+  # from the output), we can simplify the shell code below.  The
+  # following url includes discussion on what next steps we could take
+  # to simplify the complexity of this code.
+  #
+  # https://github.com/Perl/perl5/pull/20845#issuecomment-1440676127
+  #
 
   sanity_check:
     name: "Sanity: Linux -Dusethreads"
@@ -152,18 +155,18 @@ jobs:
       - name: Check what-to-do
         id: ci_config
         env:
-          CI_SKIP_SANITY: ${{ secrets.CI_SKIP_SANITY }}
-          CI_FORCE_LINUX: ${{ secrets.CI_FORCE_LINUX }}
-          CI_FORCE_LINUX_I386: ${{ secrets.CI_FORCE_LINUX_I386 }}
-          CI_FORCE_INSTALL: ${{ secrets.CI_FORCE_INSTALL }}
-          CI_FORCE_MACOS: ${{ secrets.CI_FORCE_MACOS }}
-          CI_FORCE_MSVC142: ${{ secrets.CI_FORCE_MSVC142 }}
-          CI_FORCE_MINGW64: ${{ secrets.CI_FORCE_MINGW64 }}
-          CI_FORCE_CYGWIN: ${{ secrets.CI_FORCE_CYGWIN }}
-          CI_FORCE_MINITEST: ${{ secrets.CI_FORCE_MINITEST }}
-          CI_FORCE_ASAN: ${{ secrets.CI_FORCE_ASAN }}
-          CI_FORCE_PERL_UNICODE: ${{ secrets.CI_FORCE_PERL_UNICODE }}
-          CI_FORCE_DIST_MODULES: ${{ secrets.CI_FORCE_DIST_MODULES }}
+          CI_SKIP_SANITY: ${{ vars.CI_SKIP_SANITY }}
+          CI_FORCE_LINUX: ${{ vars.CI_FORCE_LINUX }}
+          CI_FORCE_LINUX_I386: ${{ vars.CI_FORCE_LINUX_I386 }}
+          CI_FORCE_INSTALL: ${{ vars.CI_FORCE_INSTALL }}
+          CI_FORCE_MACOS: ${{ vars.CI_FORCE_MACOS }}
+          CI_FORCE_MSVC142: ${{ vars.CI_FORCE_MSVC142 }}
+          CI_FORCE_MINGW64: ${{ vars.CI_FORCE_MINGW64 }}
+          CI_FORCE_CYGWIN: ${{ vars.CI_FORCE_CYGWIN }}
+          CI_FORCE_MINITEST: ${{ vars.CI_FORCE_MINITEST }}
+          CI_FORCE_ASAN: ${{ vars.CI_FORCE_ASAN }}
+          CI_FORCE_PERL_UNICODE: ${{ vars.CI_FORCE_PERL_UNICODE }}
+          CI_FORCE_DIST_MODULES: ${{ vars.CI_FORCE_DIST_MODULES }}
         run: |
           echo '::echo::on'
           [[ -n "${CI_SKIP_SANITY}"        ]] && [[ "${CI_SKIP_SANITY%[!0 ]*}"        != "${CI_SKIP_SANITY}"        ]] && echo "ci_skip_sanity=true" >> "$GITHUB_OUTPUT"
@@ -214,16 +217,16 @@ jobs:
           TEST_JOBS=2 ./perl t/harness -nre='^porting/'
 
       # Set a variable for dependent jobs to signal if full testsuite is enabled
-      - name: "Check if EXTENDED_TESTING is set"
+      - name: "Check if DO_EXTENDED_TESTING is set"
         id: check_extended_testing
         env:
-          EXTENDED_TESTING: ${{ secrets.EXTENDED_TESTING }}
+          DO_EXTENDED_TESTING: ${{ vars.DO_EXTENDED_TESTING }}
           CURRENT_REPOSITORY: ${{ github.repository }}
         run: |
           if [[ "${CURRENT_REPOSITORY}" = 'Perl/perl5' ]]; then
             echo "Running all test jobs"
             echo "run_all_jobs=true" >> "$GITHUB_OUTPUT"
-          elif [[ -n "${EXTENDED_TESTING}" ]] && [[ "${EXTENDED_TESTING%[!0 ]*}" != "${EXTENDED_TESTING}" ]]; then
+          elif [[ -n "${DO_EXTENDED_TESTING}" ]] && [[ "${DO_EXTENDED_TESTING%[!0 ]*}" != "${DO_EXTENDED_TESTING}" ]]; then
             echo "Running all test jobs"
             echo "run_all_jobs=true" >> "$GITHUB_OUTPUT"
           else