Extract compressed source archives.

2 files changed, 73 insertions, 1 deletions

diff --git a/lib/Makefile.in b/lib/Makefile.in
index 526bf3a..07c5b35 100644
--- a/lib/Makefile.in
+++ b/lib/Makefile.in
@@ -27,7 +27,7 @@ LIBDIR = @libdir@
 
 .SUFFIXES:
 
-OBJS = controlfields architecture
+OBJS = controlfields architecture archive
 
 .PHONY: all
 all: $(OBJS)
diff --git a/lib/archive b/lib/archive
new file mode 100644
index 0000000..90cec3a
--- /dev/null
+++ b/lib/archive
@@ -0,0 +1,72 @@
+#! /bin/sh
+#
+# opkhelper
+# lib/archive
+# Functions for handling archive files.
+#
+# Copyright (C) 2012 Patrick "P. J." McDermott
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+oh_archive_extract_source()
+{
+	_matches="../${OH_SRCPKG}_${OH_PKGVER}.tar.*"
+
+	if [ "${_matches}" = ../${OH_SRCPKG}_${OH_PKGVER}.tar.\* ]; then
+		# No archive found.
+		return 1
+	fi
+
+	if [ -n "$(echo "${_matches}" | grep ' ')" ]; then
+		# Multiple archives found.
+		return 2
+	fi
+
+	# Detect the compression format.
+	# Note: dpkg's source format version 3 supports gzip, bzip2, LZMA, and XZ.
+	# We support gzip, bzip2, LZMA, and compress, since these are the formats
+	# supported by BusyBox tar.
+	z_ext=${_matches#"../${OH_SRCPKG}_${OH_PKGVER}.tar."}
+	case ${_z_ext} in
+		gz)
+			_z=z
+			;;
+		bz2)
+			_z=j
+			;;
+		lz)
+			_z=a
+			;;
+		Z)
+			_z=Z
+			;;
+		*)
+			return 3
+			;;
+	esac
+
+	_files=$(tar -t${_z}f ../${OH_SRCPKG}_${OH_PKGVER}.tar.${_z_ext} | \
+		grep -v '^./$')
+
+	if [ -z "$(echo "${_files}" | grep '/$')" ]; then
+		return 4
+	fi
+	if [ "$(echo "${_files}" | grep '/$' | wc -l)" -ne 1 ]; then
+		return 5
+	fi
+
+	tar -x${_z}f ../${OH_SRCPKG}_${OH_PKGVER}.tar.${_z_ext} || return 6
+
+	mv "${_files}" src || return 7
+}