Not sure what to do here, if we should be proceeding at all. The current
situation:

    dmcgee@galway ~/projects/pacman (master)
    $ ./scripts/repo-add /tmp/invalid.xxx 
/var/cache/pacman/pkg/apr-1.4.5-1-x86_64.pkg.tar.xz
    ==> Adding package '/var/cache/pacman/pkg/apr-1.4.5-1-x86_64.pkg.tar.xz'
      -> Computing checksums...
      -> Creating 'desc' db entry...
      -> Creating 'depends' db entry...
    ==> Creating updated database file '/tmp/invalid.xxx'
    ==> WARNING: '/tmp/invalid.xxx' does not have a valid archive extension.

    dmcgee@galway ~/projects/pacman (master)
    $ ll /tmp/invalid.xxx
    lrwxrwxrwx 1 dmcgee users 11 Jun 20 11:08 /tmp/invalid.xxx -> invalid.xxx

So we get a symlink to ourself, and overwrite the originally generated
repo database. This patch prevents this behavior, and writes out a
non-compressed database to invalid.xxx and generates no links.

Thoughts? Pacman has a requirement that the db file end in '.db', and
the only other extension out there in the wild is '.files' as far as I
know. Should we have strict enforcement of one of these two types in
repo-add? Doing this could also make the --files flag a bit less
necessary as one could auto-detect the correct setting based on the DB
extension.
---
 scripts/repo-add.sh.in |   24 ++++++++++++++----------
 1 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/scripts/repo-add.sh.in b/scripts/repo-add.sh.in
index 0ea8e5b..b29ff92 100644
--- a/scripts/repo-add.sh.in
+++ b/scripts/repo-add.sh.in
@@ -582,8 +582,10 @@ if (( success )); then
                *.tar.bz2) TAR_OPT="j" ;;
                *.tar.xz)  TAR_OPT="J" ;;
                *.tar)     TAR_OPT="" ;;
-               *) warning "$(gettext "'%s' does not have a valid archive 
extension.")" \
-               "$REPO_DB_FILE" ;;
+               *)
+                       warning "$(gettext "'%s' does not have a valid archive 
extension.")" \
+                               "$REPO_DB_FILE"
+                       TAR_OPT="" ;;
        esac
 
        filename=${REPO_DB_FILE##*/}
@@ -605,14 +607,16 @@ if (( success )); then
        [[ -f $tmpdir/$filename ]] && mv "$tmpdir/$filename" "$REPO_DB_FILE"
        [[ -f $tmpdir/$filename.sig ]] && mv "$tmpdir/$filename.sig" 
"$REPO_DB_FILE.sig"
        dblink="${REPO_DB_FILE%.tar*}"
-       target=${REPO_DB_FILE##*/}
-       ln -sf "$target" "$dblink" 2>/dev/null || \
-               ln -f "$target" "$dblink" 2>/dev/null || \
-               cp "$REPO_DB_FILE" "$dblink"
-       if [[ -f "$target.sig" ]]; then
-               ln -sf "$target.sig" "$dblink.sig" 2>/dev/null || \
-                       ln -f "$target.sig" "$dblink.sig" 2>/dev/null || \
-                       cp "$REPO_DB_FILE.sig" "$dblink.sig"
+       if [[ $dblink != $REPO_DB_FILE ]]; then
+               target=${REPO_DB_FILE##*/}
+               ln -sf "$target" "$dblink" 2>/dev/null || \
+                       ln -f "$target" "$dblink" 2>/dev/null || \
+                       cp "$REPO_DB_FILE" "$dblink"
+               if [[ -f "$target.sig" ]]; then
+                       ln -sf "$target.sig" "$dblink.sig" 2>/dev/null || \
+                               ln -f "$target.sig" "$dblink.sig" 2>/dev/null 
|| \
+                               cp "$REPO_DB_FILE.sig" "$dblink.sig"
+               fi
        fi
 else
        msg "$(gettext "No packages modified, nothing to do.")"
-- 
1.7.5.4


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