Use curl instead of wget in build scripts

curl is already required, so drop wget as a build requirement.
build_autoupdate.sh now checks the HTTP status code for its ETag cache
instead of relying on wget not creating the file on a 304.

app/scripts/check_requirements

@@ -56,9 +56,6 @@ which python3 || { $FAIL_CMD; FAILED=1; }
 echo -n "Checking for curl: "
 which curl || { $FAIL_CMD; FAILED=1; }
 
-echo -n "Checking for wget: "
-which wget || { $FAIL_CMD; FAILED=1; }
-
 echo -n "Checking for zip: "
 which zip || { $FAIL_CMD; FAILED=1; }
 

app/scripts/get_commit_files

@@ -14,7 +14,7 @@ hash="$1"
 tmpdir=`mktemp -d`
 
 cd $tmpdir
-wget -O build.zip "https://$S3_BUCKET.s3.amazonaws.com/$S3_CI_ZIP_PATH/$hash.zip" >&2 \
+curl -sS -f -L -o build.zip "https://$S3_BUCKET.s3.amazonaws.com/$S3_CI_ZIP_PATH/$hash.zip" >&2 \
 	|| (echo "ZIP file not found for commit '$hash'" && exit 1)
 unzip build.zip >&2
 rm build.zip

app/update-packaging/build_autoupdate.sh

@@ -215,10 +215,12 @@ for version in "$FROM" "$TO"; do
 		set +e
 		# Cached version is available
 		if [ -n "$ETAG" ]; then
-			NEW_ETAG=$(wget -nv -S --header "If-None-Match: $ETAG" $URL 2>&1 | awk '/ *ETag: */ {print $2}')
+			HTTP_CODE=$(curl -sS -L -D headers.txt -o $archive -w '%{http_code}' -H "If-None-Match: $ETAG" "$URL")
+			NEW_ETAG=$(awk 'tolower($1) == "etag:" {print $2}' headers.txt | tr -d '\r' | tail -n 1)
+			rm -f headers.txt
 			
 			# If ETag didn't match, cache newly downloaded version
-			if [ -f $archive ]; then
+			if [ "$HTTP_CODE" = 200 ]; then
 				echo "ETag for $archive didn't match! -- using new version"
 				rm -f "$CACHE_DIR/$archive.etag"
 				cp $archive "$CACHE_DIR/"
@@ -229,7 +231,9 @@ for version in "$FROM" "$TO"; do
 				cp "$CACHE_DIR/$archive" .
 			fi
 		else
-			NEW_ETAG=$(wget -nv -S $URL 2>&1 | awk '/ *ETag: */ {print $2}')
+			curl -sS -f -L -D headers.txt -o $archive "$URL"
+			NEW_ETAG=$(awk 'tolower($1) == "etag:" {print $2}' headers.txt | tr -d '\r' | tail -n 1)
+			rm -f headers.txt
 			
 			# Save archive to cache
 			rm -f "$CACHE_DIR/$archive.etag"

app/win/download-nsis-plugins

@@ -20,7 +20,7 @@ ROOT_DIR="$(dirname "$SCRIPT_DIR")"
 #mkdir -p nsis
 #cd nsis
 #for plugin in $plugins; do
-#	 wget $plugin
+#	 curl -fsSLO $plugin
 #done
 #
 #unzip_cmd="unzip -d Plugins -j"