Merge pull request #287 from Samusia/samusia/fix_arm64_support

Fix ARM64 support for old terraform versions

Author: Zordrak

libexec/tfenv-install

@@ -85,7 +85,19 @@ fi;
 # Add support of ARM64 for Linux & Apple Silicon
 case "$(uname -m)" in
   aarch64* | arm64*)
-    TFENV_ARCH="${TFENV_ARCH:-arm64}";
+    # There is no arm64 support for versions:
+    # < 0.11.15
+    # >= 0.12.0, < 0.12.30
+    # >= 0.13.0, < 0.13.5
+    if [[ "${version}" =~ 0\.(([0-9]|10))\.\d* ||
+          "${version}" =~ 0\.11\.(([0-9]|1[0-4]))$ ||
+          "${version}" =~ 0\.12\.(([0-9]|[1-2][0-9]))$ ||
+          "${version}" =~ 0\.13\.[0-4]$
+    ]]; then
+      TFENV_ARCH="${TFENV_ARCH:-amd64}";
+    else
+      TFENV_ARCH="${TFENV_ARCH:-arm64}";
+    fi;
     ;;
   *)
     TFENV_ARCH="${TFENV_ARCH:-amd64}";