cicd: a series of small improvements

.github/scripts/cross.sh

@@ -1,9 +1,16 @@
 #!/bin/bash
 
-set -x
+# set -x
 set -e
 
-if [ "$CROSS" != 1 ]; then
+if [ "$BUILD_CMD" != "cross" ]; then
+    echo "cross.sh - is a helper to assist only in cross compiling environments" >&2
+    echo "To use this tool set the BUILD_CMD env var to the \"cross\" value" >&2
+    exit 111
+fi
+
+if [ -z "$CROSS_IMAGE" ]; then
+    echo "The CROSS_IMAGE env var should be provided" >&2
     exit 111
 fi
 

.github/scripts/make.sh

@@ -1,9 +1,9 @@
 #!/bin/bash
 
-set -x
+# set -x
 set -e
 
-if [ "$CROSS" = 1 ]; then
+if [ "$BUILD_CMD" == "cross" ]; then
     if [ -z "$CC" ]; then
         echo "make.sh: CC is not set" >&2
         exit 111

.github/scripts/tree-sitter.sh

@@ -1,11 +1,27 @@
 #!/bin/bash
 
-set -x
+# set -x
 set -e
 
+if [ -z "$ROOT" ]; then
+    echo "The ROOT env var should be set to absolute path of a repo root folder" >&2
+    exit 111
+fi
+
+if [ -z "$TARGET" ]; then
+    echo "The TARGET env var should be equal to a \`cargo build --target <TARGET>\` command value" >&2
+    exit 111
+fi
+
 tree_sitter="$ROOT"/target/"$TARGET"/release/tree-sitter
 
-if [ "$CROSS" = 1 ]; then
+if [ "$BUILD_CMD" == "cross" ]; then
+    if [ -z "$CROSS_RUNNER" ]; then
+        echo "The CROSS_RUNNER env var should be set to a CARGO_TARGET_*_RUNNER env var value" >&2
+        echo "that is available in a docker image used by the cross tool under the hood" >&2
+        exit 111
+    fi
+
     cross.sh $CROSS_RUNNER "$tree_sitter" "$@"
 else
     "$tree_sitter" "$@"