Better error message on missing curl/wget

[stockfish] / src / Makefile

diff --git a/src/Makefile b/src/Makefile
index 0f458aa185d608b3429baba9239e6dbb48f9e992..a3feb68e3e349957c97155a4543ac9c31e97c5b6 100644 (file)
--- a/src/Makefile
+++ b/src/Makefile
@@ -598,7 +598,7 @@ help:
        @echo "ppc-64                  > PPC 64-bit"
        @echo "ppc-32                  > PPC 32-bit"
        @echo "armv7                   > ARMv7 32-bit"
-       @echo "armv7-neon"             > ARMv7 32-bit with popcnt and neon"
+       @echo "armv7-neon              > ARMv7 32-bit with popcnt and neon"
        @echo "armv8                   > ARMv8 64-bit with popcnt and neon"
        @echo "apple-silicon           > Apple silicon ARM64"
        @echo "general-64              > unspecified 64-bit"
@@ -669,9 +669,24 @@ net:
        @echo "Default net: $(nnuenet)"
        $(eval nnuedownloadurl := https://tests.stockfishchess.org/api/nn/$(nnuenet))
        $(eval curl_or_wget := $(shell if hash curl 2>/dev/null; then echo "curl -skL"; elif hash wget 2>/dev/null; then echo "wget -qO-"; fi))
-       @if test -f "$(nnuenet)"; then echo "Already available."; else echo "Downloading $(nnuedownloadurl)"; $(curl_or_wget) $(nnuedownloadurl) > $(nnuenet); fi
+       @if test -f "$(nnuenet)"; then \
+            echo "Already available."; \
+         else \
+            if [ "x$(curl_or_wget)" = "x" ]; then \
+               echo "Automatic download failed: neither curl nor wget is installed. Install one of these tools or download the net manually"; exit 1; \
+            else \
+               echo "Downloading $(nnuedownloadurl)"; $(curl_or_wget) $(nnuedownloadurl) > $(nnuenet);\
+            fi; \
+        fi;
        $(eval shasum_command := $(shell if hash shasum 2>/dev/null; then echo "shasum -a 256 "; elif hash sha256sum 2>/dev/null; then echo "sha256sum "; fi))
-       @if [ "$(nnuenet)" != "nn-"`$(shasum_command) $(nnuenet) | cut -c1-12`".nnue" ]; then echo "Failed download or $(nnuenet) corrupted, please delete!"; exit 1; fi
+       @if [ "x$(shasum_command)" != "x" ]; then \
+           if [ "$(nnuenet)" != "nn-"`$(shasum_command) $(nnuenet) | cut -c1-12`".nnue" ]; then \
+                echo "Failed download or $(nnuenet) corrupted, please delete!"; exit 1; \
+            fi \
+         else \
+            echo "shasum / sha256sum not found, skipping net validation"; \
+        fi
+
 
 # clean binaries and objects
 objclean: