Detect both wget/curl and allow user to select the agent

Signed-off-by: Alexey Neyman <stilor@att.net>

Makefile.in

@@ -62,6 +62,8 @@ export awk             := @AWK@
 export grep            := @GREP@
 export make            := @MAKE@
 export sed             := @SED@
+export wget            := @wget@
+export curl            := @curl@
 export libtool         := @LIBTOOL@
 export libtoolize      := @LIBTOOLIZE@
 export objcopy         := @OBJCOPY@
@@ -155,6 +157,7 @@ uninstall: real-uninstall
 # Build rules
 
 build-bin: $(PROG_NAME)             \
+           scripts/scripts.mk       \
            scripts/crosstool-NG.sh  \
            scripts/saveSample.sh    \
            scripts/showConfig.sh
@@ -187,6 +190,8 @@ define sed_it
 	           -e 's,@@CT_make@@,$(make),g;'            \
 	           -e 's,@@CT_bash@@,$(bash),g;'            \
 	           -e 's,@@CT_awk@@,$(awk),g;'              \
+	           -e 's,@@CT_wget@@,$(wget),g;'            \
+	           -e 's,@@CT_curl@@,$(curl),g;'            \
 	           $< >$@
 endef
 
@@ -258,6 +263,8 @@ FORCE:
 clean-bin:
 	@echo "  RM     '$(PROG_NAME)'"
 	@rm -f $(PROG_NAME)
+	@echo "  RM     'scripts/scripts.mk'"
+	@rm -f scripts/scripts.mk
 	@echo "  RM     'scripts/crosstool-NG.sh'"
 	@rm -f scripts/crosstool-NG.sh
 	@echo "  RM     'scripts/saveSample.sh'"

config/global/download.in

@@ -2,6 +2,23 @@
 
 comment "Downloading"
 
+choice
+    prompt "Download agent"
+
+config DOWNLOAD_AGENT_WGET
+    bool "wget"
+    depends on CONFIGURE_has_wget
+
+config DOWNLOAD_AGENT_CURL
+    bool "curl"
+    depends on CONFIGURE_has_curl
+
+config DOWNLOAD_AGENT_NONE
+    bool "none (forbid download)"
+    select FORBID_DOWNLOAD
+
+endchoice
+
 config FORBID_DOWNLOAD
     bool
     prompt "Forbid downloads"
@@ -11,7 +28,7 @@ config FORBID_DOWNLOAD
       If you do not have network connectivity when you run crosstool-NG,
       and some files are missing, it can be a long time before crosstool-NG
       fails.
-      
+
       Saying 'y' here will prevent crosstool-NG from downloading missing
       files, thus failing early so that you don't get stuck.
 
@@ -22,7 +39,7 @@ config FORCE_DOWNLOAD
     prompt "Force downloads"
     help
       Force downloading tarballs, even if one already exists.
-      
+
       Useful if you suspect a tarball to be damaged.
 
 config CONNECT_TIMEOUT
@@ -31,7 +48,7 @@ config CONNECT_TIMEOUT
     default 10
     help
       Maximum time in seconds that you allow the connection to the server to take.
-      
+
       The scenario is as follows;
         - some enterprise networks have firewalls that prohibit FTP traffic, while
           still allowing HTTP
@@ -39,13 +56,29 @@ config CONNECT_TIMEOUT
         - after this number of seconds, it is considered that the connection could
           not be established, and the next URL in the list is tried, until we reach
           an URL that will go through the firewall, most probably an http:// URL.
-      
+
       If you have a slow network, you'd better set this value higher than the default
       10s. If you know a firewall is blocking connections, but your network is globally
       fast, you can try to lower this value to jump more quickly to allowed URLs. YMMV.
-      
+
       If '-1' is specified, no timeout reconfiguration options are passed to wget.
 
+if DOWNLOAD_AGENT_WGET
+
+config DOWNLOAD_WGET_OPTIONS
+    string "Extra options to wget"
+    default "--passive-ftp --tries=3 -nc --progress=dot:binary"
+
+endif
+
+if DOWNLOAD_AGENT_CURL
+
+config DOWNLOAD_CURL_OPTIONS
+    string "Extra options to curl"
+    default "--location --ftp-pasv --retry 3 --fail --silent"
+
+endif
+
 config ONLY_DOWNLOAD
     bool
     prompt "Stop after downloading tarballs"

configure.ac

@@ -218,12 +218,22 @@ ACX_CHECK_PROGS_REQ([makeinfo], [makeinfo])
 ACX_CHECK_PROGS_REQ([cut], [cut])
 ACX_CHECK_PROGS_REQ([stat], [stat])
 ACX_CHECK_PROGS_REQ([readlink], [readlink])
-ACX_CHECK_PROGS_REQ([wget], [wget])
 ACX_CHECK_PROGS_REQ([tar], [tar])
 ACX_CHECK_PROGS_REQ([gzip], [gzip])
 ACX_CHECK_PROGS_REQ([bzip2], [bzip2])
 ACX_CHECK_PROGS_REQ([help2man], [help2man])
 
+# Not a fatal failure even if we have neither - the tarballs may
+# be provided in a local directory.
+AC_CHECK_PROGS([wget], [wget])
+ACX_SET_KCONFIG_OPTION([wget])
+AC_SUBST([wget])
+
+AC_CHECK_PROGS([curl], [curl])
+ACX_SET_KCONFIG_OPTION([curl])
+AC_SUBST([curl])
+
+
 #--------------------------------------------------------------------
 # Still boring, but remember the path, now...
 #--------------------------------------------------------------------

ct-ng.in

@@ -28,7 +28,7 @@ include $(CT_LIB_DIR)/paths.mk
 # Some distributions (eg. Ubuntu) thought it wise to point /bin/sh to
 # a truly POSIX-conforming shell, ash in this case. This is not so good
 # as we, smart (haha!) developers (as smart we ourselves think we are),
-# got used to bashisms, and are enclined to easiness... So force use of
+# got used to bashisms, and are inclined to easiness... So force use of
 # bash.
 export SHELL=$(bash)
 
@@ -36,7 +36,7 @@ export SHELL=$(bash)
 # We do not need any GREP_OPTIONS anyway, so set it to empty.
 export GREP_OPTIONS=
 
-# Make the restart/stop steps availabe to scripts/crostool-NG.sh
+# Make the restart/stop steps available to scripts/crostool-NG.sh
 export CT_STOP:=$(STOP)
 export CT_RESTART:=$(RESTART)
 

scripts/functions

@@ -663,29 +663,34 @@ CT_DoGetFile() {
     local url="${1}"
     local dest="${CT_TARBALLS_DIR}/${url##*/}"
     local tmp="${dest}.tmp-dl"
+    local ok
+    local T
 
     # Remove potential left-over from a previous run
     rm -f "${tmp}"
 
-    # We also retry a few times, in case there is a transient error (eg. behind
-    # a dynamic IP that changes during the transfer...)
-    # With automated download as we are doing, it can be very dangerous to
-    # continue the downloads. It's far better to simply overwrite the
-    # destination file.
-    # Some company networks have firewalls to connect to the internet, but it's
-    # not easy to detect them, so force a global ${CT_CONNECT_TIMEOUT}-second
-    # timeout.
-    if [ ${CT_CONNECT_TIMEOUT} = -1 ]; then
-        T=
-    else
-        T="-T ${CT_CONNECT_TIMEOUT}"
+    # Replace a special value of '-1' with empty string
+    if [ ${CT_CONNECT_TIMEOUT} != -1 ]; then
+        T="${CT_CONNECT_TIMEOUT}"
     fi
-    if CT_DoExecLog ALL wget --passive-ftp --tries=3 -nc    \
-                             --progress=dot:binary          \
-                             ${T}                           \
-                             -O "${tmp}"                    \
-                             "${url}"
-    then
+
+    if [ "${CT_DOWNLOAD_AGENT_WGET}" = "y" ]; then
+        if CT_DoExecLog ALL wget ${CT_DOWNLOAD_WGET_OPTIONS} \
+                                 ${T:+-T ${T}}               \
+                                 -O "${tmp}"                 \
+                                 "${url}"; then
+            ok=y
+        fi
+    elif [ "${CT_DOWNLOAD_AGENT_CURL}" = "y" ]; then
+        if CT_DoExecLog ALL curl ${CT_DOWNLOAD_CURL_OPTIONS}  \
+                                 ${T:+--connect-timeout ${T}} \
+                                 -o "${tmp}"                  \
+                                 "${url}"; then
+            ok=y
+        fi
+    fi
+
+    if [ "${ok}" = "y" ]; then
         # Success, we got it, good!
         mv "${tmp}" "${dest}"
         CT_DoLog DEBUG "Got it from: \"${url}\""

scripts/scripts.mk.in

@@ -26,9 +26,19 @@ updatetools: $(CONFIG_SUB_DEST) $(CONFIG_GUESS_DEST)
 # ----------------------------------------------------------
 # How to retrieve the tools
 
-wget_opt=-o /dev/null
-ifeq ($(strip $(V)),2)
-  wget_opt=
+ifneq ($(strip $(V)),2)
+  wget_silent_opt = -o /dev/null
+  curl_silent_opt = --silent
+endif
+
+ifneq (@@CT_wget@@,)
+download_cmd = wget --passive-ftp $(wget_silent_opt) -O $@
+else
+ifneq (@@CT_curl@@,)
+download_cmd = curl --ftp-pasv $(curl_silent_opt) -o $@
+else
+download_cmd = $(error wget or curl needed for downloads)
+endif
 endif
 
 PHONY += scripts
@@ -37,13 +47,13 @@ scripts:
 	$(SILENT)mkdir -p $@
 
 $(CONFIG_SUB_DEST): scripts FORCE
-	@$(CT_ECHO) '  WGET  $@'
-	$(SILENT)wget $(wget_opt) -O $@ $(CONFIG_SUB_SRC)
+	@$(CT_ECHO) '  DOWNLOAD  $@'
+	$(SILENT)$(download_cmd) $(CONFIG_SUB_SRC)
 	$(SILENT)chmod u+rwx,go+rx-w $@
 
 $(CONFIG_GUESS_DEST): scripts FORCE
-	@$(CT_ECHO) '  WGET  $@'
-	$(SILENT)wget $(wget_opt) -O $@ $(CONFIG_GUESS_SRC)
+	@$(CT_ECHO) '  DOWNLOAD  $@'
+	$(SILENT)$(download_cmd) $(CONFIG_GUESS_SRC)
 	$(SILENT)chmod u+rwx,go+rx-w $@
 
 # ----------------------------------------------------------