pkgmk: add support for curl

See FS#1060, https://crux.nu/bugs/index.php?do=details&task_id=1060

New variables in /etc/pkgmk.conf:

PKGMK_DOWNLOAD_PROG="" (curl or wget)
PKGMK_CURL_OPTS="" (parameters for curl, when using curl)

pkgmk.8.in

@@ -86,6 +86,9 @@ MD5 checksum of source files.
 .B "/etc/pkgmk.conf"
 Global package make configuration.
 .TP
+.B "curl"
+Used by pkgmk to download source code.
+.TP
 .B "wget"
 Used by pkgmk to download source code.
 .SH EXIT CODES
@@ -120,7 +123,7 @@ An error occured while running the build function.
 .B 9
 An error occured while installing the package via pkgadd.
 .SH SEE ALSO
-pkgmk.conf(5), pkgadd(8), pkgrm(8), pkginfo(8), rejmerge(8), wget(1)
+pkgmk.conf(5), pkgadd(8), pkgrm(8), pkginfo(8), rejmerge(8), curl(1), wget(1)
 .SH COPYRIGHT
 pkgmk (pkgutils) is Copyright (c) 2000-2005 Per Liden and Copyright (c) 2006-2013 CRUX team (http://crux.nu).
 pkgmk (pkgutils) is licensed through the GNU General Public License.

pkgmk.conf

@@ -30,6 +30,7 @@ esac
 # PKGMK_IGNORE_FOOTPRINT="no"
 # PKGMK_IGNORE_NEW="no"
 # PKGMK_NO_STRIP="no"
+# PKGMK_DOWNLOAD_PROG="wget"
 # PKGMK_WGET_OPTS=""
 # PKGMK_COMPRESSION_MODE="gz"
 

pkgmk.conf.5.in

@@ -44,6 +44,16 @@ Set directory for building packages.
 .br
 Default: '\fBfoo\fP/work', where \fBfoo\fP is the directory of the Pkgfile.
 .TP
+\fBPKGMK_DOWNLOAD_PROG='STRING'\fP
+Use specified program to download source archives. Valid strings are curl and wget.
+.br
+Default: 'wget'
+.br
+.TP
+\fBPKGMK_CURL_OPTS='STRING'\fP
+Additional options for curl(1), which is used by pkgmk to download all files.
+.br
+.TP
 \fBPKGMK_WGET_OPTS='STRING'\fP
 Additional options for wget(1), which is used by pkgmk to download all files.
 .br

pkgmk.in

@@ -97,20 +97,32 @@ check_file() {
 download_file() {
 	info "Downloading '$1'."
 
-	if [ ! "`type -p wget`" ]; then
-		error "Command 'wget' not found."
+	PKGMK_DOWNLOAD_PROG=${PKGMK_DOWNLOAD_PROG:-wget}
+	if [ ! "`type -p ${PKGMK_DOWNLOAD_PROG}`" ]; then
+		error "Command '${PKGMK_DOWNLOAD_PROG}' not found."
 		exit $E_GENERAL
 	fi
 
 	LOCAL_FILENAME=`get_filename $1`
 	LOCAL_FILENAME_PARTIAL="$LOCAL_FILENAME.partial"
-	DOWNLOAD_OPTS="--passive-ftp --no-directories --tries=3 --waitretry=3 \
-		--directory-prefix=$PKGMK_SOURCE_DIR \
-		--output-document=$LOCAL_FILENAME_PARTIAL --no-check-certificate"
+	
+	case ${PKGMK_DOWNLOAD_PROG} in
+		curl)
+			RESUME_CMD="-C -"
+			DOWNLOAD_OPTS="-L --fail --ftp-pasv --retry 3 --retry-delay 3 \
+			-o $LOCAL_FILENAME_PARTIAL --insecure $PKGMK_CURL_OPTS"
+			;;
+		wget)
+			RESUME_CMD="-c"
+			DOWNLOAD_OPTS="--passive-ftp --no-directories --tries=3 --waitretry=3 \
+			--directory-prefix=$PKGMK_SOURCE_DIR \
+			--output-document=$LOCAL_FILENAME_PARTIAL --no-check-certificate $PKGMK_WGET_OPTS"
+			;;
+	esac
 
 	if [ -f "$LOCAL_FILENAME_PARTIAL" ]; then
 		info "Partial download found, trying to resume"
-		RESUME_CMD="-c"
+		RESUME_OPTS="$RESUME_CMD"
 	fi
 
 	error=1
@@ -118,7 +130,7 @@ download_file() {
 	BASENAME=`get_basename $1`
 	for REPO in ${PKGMK_SOURCE_MIRRORS[@]}; do
 		REPO="`echo $REPO | sed 's|/$||'`"
-		wget $RESUME_CMD $DOWNLOAD_OPTS $PKGMK_WGET_OPTS $REPO/$BASENAME
+		$PKGMK_DOWNLOAD_PROG $DOWNLOAD_OPTS $RESUME_OPTS $REPO/$BASENAME
 		error=$?
 		if [ $error == 0 ]; then
 			break
@@ -127,19 +139,19 @@ download_file() {
 
 	if [ $error != 0 ]; then
 		while true; do
-			wget $RESUME_CMD $DOWNLOAD_OPTS $PKGMK_WGET_OPTS $1
+			$PKGMK_DOWNLOAD_PROG $DOWNLOAD_OPTS $RESUME_OPTS $1
 			error=$?
-			if [ $error != 0 ] && [ "$RESUME_CMD" ]; then
+			if [ $error != 0 ] && [ "$RESUME_OPTS" ]; then
 				info "Partial download failed, restarting"
 				rm -f "$LOCAL_FILENAME_PARTIAL"
-				RESUME_CMD=""
+				RESUME_OPTS=""
 			else
 				break
 			fi
 		done
 	fi
 	
-	if [ $error != 0 ]; then
+	if [ $error != 0 -o ! -f "$LOCAL_FILENAME_PARTIAL" ]; then
 		error "Downloading '$1' failed."
 		exit $E_DOWNLOAD
 	fi