support/download: convert scp to use the wrapper

This drastically simplifies the scp helper, as it no longer has to deal
with atomically saving the downloaded archive.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Tested-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
(Tested by setting a primary site to 'scp://localhost:/tmp' and
running 'make vim-source')
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/pkg-download.mk

@@ -168,8 +168,9 @@ endef
 # to prepend the path with a slash: scp://[user@]host:/absolutepath
 define DOWNLOAD_SCP
 	test -e $(DL_DIR)/$(2) || \
-	$(EXTRA_ENV) support/download/scp '$(call stripurischeme,$(call qstrip,$(1)))' \
-					  $(DL_DIR)/$(2) && \
+	$(EXTRA_ENV) support/download/wrapper scp \
+		$(DL_DIR)/$(2) \
+		'$(call stripurischeme,$(call qstrip,$(1)))' && \
 	$(call VERIFY_HASH,$(PKGDIR)/$($(PKG)_NAME).hash,$(DL_DIR)/$(2))
 endef
 

support/download/scp

@@ -1,28 +1,16 @@
 #!/bin/bash
 
-# We want to catch any command failure, and exit immediately
+# We want to catch any unexpected failure, and exit immediately
 set -e
 
-# Download helper for scp
-# Call it with:
-#   $1: URL
-#   $2: output file
+# Download helper for scp, to be called from the download wrapper script
+# Expected arguments:
+#   $1: output file
+#   $2: URL
 # And this environment:
 #   SCP       : the scp command to call
 
-url="${1}"
-output="${2}"
-tmp_dl="$( mktemp "${BUILD_DIR}/.XXXXXX" )"
-tmp_output="$( mktemp "${output}.XXXXXX" )"
+output="${1}"
+url="${2}"
 
-ret=1
-if ${SCP} "${url}" "${tmp_dl}"; then
-    if mv "${tmp_dl}" "${tmp_output}"; then
-        mv "${tmp_output}" "${output}"
-        ret=0
-    fi
-fi
-
-# Cleanup
-rm -f "${tmp_dl}" "${tmp_output}"
-exit ${ret}
+${SCP} "${url}" "${output}"