sandcastle · April 23, 2025 05:31 · Apr 23, 2025
diff --git a/Results b/Results
@@ -0,0 +1,83 @@
+========== bash ==========
+
+--- plain mode (bash ) ---
+HAS_PIPEFAIL    = 1
+HAS_ARRAY       = 1
+HAS_EUO         = 1
+HAS_EVAL        = 1
+HAS_ASSOC_ARRAY = 1
+HAS_DBLBRACK    = 1
+
+--- interactive mode (bash -i) ---
+HAS_PIPEFAIL    = 1
+HAS_ARRAY       = 1
+HAS_EUO         = 1
+HAS_EVAL        = 1
+HAS_ASSOC_ARRAY = 1
+HAS_DBLBRACK    = 1
+
+--- login+interactive mode (bash -il) ---
+Welcome to Cloud Shell! Type "help" to get started.
+To set your Cloud Platform project in this session use `gcloud config set project [PROJECT_ID]`.
+You can view your projects by running `gcloud projects list`.
+HAS_PIPEFAIL    = 1
+HAS_ARRAY       = 1
+HAS_EUO         = 1
+HAS_EVAL        = 1
+HAS_ASSOC_ARRAY = 1
+HAS_DBLBRACK    = 1
+
+========== zsh ==========
+
+--- plain mode (zsh ) ---
+HAS_PIPEFAIL    = 1
+HAS_ARRAY       = 0
+HAS_EUO         = 1
+HAS_EVAL        = 1
+HAS_ASSOC_ARRAY = 1
+HAS_DBLBRACK    = 1
+
+--- interactive mode (zsh -i) ---
+HAS_PIPEFAIL    = 1
+HAS_ARRAY       = 0
+HAS_EUO         = 1
+HAS_EVAL        = 1
+HAS_ASSOC_ARRAY = 1
+HAS_DBLBRACK    = 1
+
+--- login+interactive mode (zsh -il) ---
+HAS_PIPEFAIL    = 1
+HAS_ARRAY       = 0
+HAS_EUO         = 1
+HAS_EVAL        = 1
+HAS_ASSOC_ARRAY = 1
+HAS_DBLBRACK    = 1
+
+========== sh ==========
+
+--- plain mode (sh ) ---
+HAS_PIPEFAIL    = 1
+HAS_ARRAY       = 1
+HAS_EUO         = 1
+HAS_EVAL        = 1
+HAS_ASSOC_ARRAY = 1
+HAS_DBLBRACK    = 1
+
+--- interactive mode (sh -i) ---
+HAS_PIPEFAIL    = 1
+HAS_ARRAY       = 1
+HAS_EUO         = 1
+HAS_EVAL        = 1
+HAS_ASSOC_ARRAY = 1
+HAS_DBLBRACK    = 1
+
+--- login+interactive mode (sh -il) ---
+Welcome to Cloud Shell! Type "help" to get started.
+To set your Cloud Platform project in this session use `gcloud config set project [PROJECT_ID]`.
+You can view your projects by running `gcloud projects list`.
+HAS_PIPEFAIL    = 1
+HAS_ARRAY       = 1
+HAS_EUO         = 1
+HAS_EVAL        = 1
+HAS_ASSOC_ARRAY = 1
+HAS_DBLBRACK    = 1
diff --git a/test.sh b/test.sh
@@ -0,0 +1,49 @@
+tee x.sh >/dev/null <<'EOF'
+#!/usr/bin/env sh
+# ── probe six core capabilities (each one-liner is side-effect free) ──
+( set -o pipefail           ) 2>/dev/null && HAS_PIPEFAIL=1 || HAS_PIPEFAIL=0
+( foo=(); foo[0]=x          ) 2>/dev/null && HAS_ARRAY=1    || HAS_ARRAY=0
+( set -euo pipefail; :      ) 2>/dev/null && HAS_EUO=1      || HAS_EUO=0
+( eval :                    ) 2>/dev/null && HAS_EVAL=1     || HAS_EVAL=0
+( typeset -A _A 2>/dev/null ) 2>/dev/null && HAS_ASSOC_ARRAY=1 || HAS_ASSOC_ARRAY=0
+( [[ 1 -eq 1 ]]             ) 2>/dev/null && HAS_DBLBRACK=1 || HAS_DBLBRACK=0
+
+printf 'HAS_PIPEFAIL    = %s\n' "$HAS_PIPEFAIL"
+printf 'HAS_ARRAY       = %s\n' "$HAS_ARRAY"
+printf 'HAS_EUO         = %s\n' "$HAS_EUO"
+printf 'HAS_EVAL        = %s\n' "$HAS_EVAL"
+printf 'HAS_ASSOC_ARRAY = %s\n' "$HAS_ASSOC_ARRAY"
+printf 'HAS_DBLBRACK    = %s\n' "$HAS_DBLBRACK"
+EOF
+chmod +x x.sh
+
+# ─── driver that runs x.sh under bash, zsh, sh in plain/interactive/login ───
+tee run-matrix.sh >/dev/null <<'EOF'
+#!/usr/bin/env bash
+PROBE="./x.sh"                                # script to test
+
+shells=(bash zsh sh)                          # add ksh, dash, etc. if desired
+modes=("" "-i" "-il")                         # plain, interactive, login+interactive
+mode_names=("plain" "interactive" "login+interactive")
+
+for shell in "${shells[@]}"; do
+  command -v "$shell" >/dev/null 2>&1 || { echo "⏭  $shell not found"; continue; }
+  printf '\n========== %s ==========\n' "$shell"
+
+  for idx in "${!modes[@]}"; do
+    mode="${modes[$idx]}"
+    label="${mode_names[$idx]}"
+    printf '\n--- %s mode (%s %s) ---\n' "$label" "$shell" "$mode"
+
+    if [ -z "$mode" ]; then
+      "$shell" "$PROBE"                       # plain script execution
+    else
+      "$shell" $mode "$PROBE"                 # -i x.sh  or  -il x.sh
+    fi
+  done
+done
+EOF
+
+chmod +x run-matrix.sh
+
+. run-matrix.sh
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