[PATCH 5 of 5] scripts/functions: force extract folder to archive basename

["Benoît THÉBAUDEAU" <benoit.thebaudeau@advansee.com>]

# HG changeset patch
# User "Benoît THÉBAUDEAU" <benoit.thebaudeau@advansee.com>
# Date 1311867232 -7200
# Node ID 50c28edc0a0ebe6bf285b6656233365e2ed88df0
# Parent  ac0f1f93198fca8e2f28b9499e197fa387c67234
scripts/functions: force extract folder to archive basename

Some archives like those of the 2011.07 revisions of Linaro GCC contain a folder
name different from the archive basename, which leads to errors afterwards, e.g.
when patching. E.g.:
gcc-linaro-4.5-2011.07.tar.bz2 extracts to gcc-linaro-4.5-2011.07-0/

This patch changes CT_Extract() to force the extraction of all archives to a
folder named like the archive basename. E.g.:
gcc-linaro-4.5-2011.07.tar.bz2 now extracts to gcc-linaro-4.5-2011.07/

Signed-off-by: "Benoît THÉBAUDEAU" <benoit.thebaudeau@advansee.com>

diff --git a/scripts/functions b/scripts/functions
--- a/scripts/functions
+++ b/scripts/functions
@@ -728,10 +728,15 @@
     CT_Pushd "${nochdir}"
 
     CT_DoLog EXTRA "Extracting '${basename}'"
+    CT_DoExecLog FILE mkdir -p "${basename}"
     case "${ext}" in
-        .tar.bz2)     CT_DoExecLog FILE tar xvjf "${full_file}";;
-        .tar.gz|.tgz) CT_DoExecLog FILE tar xvzf "${full_file}";;
-        .tar)         CT_DoExecLog FILE tar xvf  "${full_file}";;
+        .tar.bz2)     { bzcat "${full_file}" \
+                        |tar --strip-components=1 -C "${basename}" -xvf - ;
+                      } 2>&1 |CT_DoLog FILE;;
+        .tar.gz|.tgz) { gzip -d -c "${full_file}" \
+                        |tar --strip-components=1 -C "${basename}" -xvf - ;
+                      } 2>&1 |CT_DoLog FILE;;
+        .tar)         CT_DoExecLog FILE tar --strip-components=1 -C "${basename}" -xvf "${full_file}";;
         /.git)        CT_ExtractGit "${basename}" "${@}";;
         *)            CT_DoLog WARN "Don't know how to handle '${basename}${ext}': unknown extension"
                       return 1