pkg_owner(): add function to retrieve the owning package of a file

This function is almost identical to the function with the same name on
kiss. However, instead of saving the owner on a global variable, the function
prints the owning package to the standard output.

The function can be called similar to grep. The usage is:

    pkg_owner GREP_FLAGS FILE_TO_CHECK MANIFEST_LOCATIONS...

If no manifest is specified, the function will use every installed package
on the system database.

FossilOrigin-Name: 53cbeff7a92850efd172960f12848885961655c9c53e24a5f8cb8da7642ce541

1 files changed, 13 insertions, 0 deletions

diff --git a/src/cpt-lib b/src/cpt-lib
index 12d2f2d..56f43de 100644
--- a/src/cpt-lib
+++ b/src/cpt-lib
@@ -393,6 +393,19 @@ sh256() {
         while read -r hash _; do printf '%s  %s\n' "$hash" "$1"; done
 }
 
+pkg_owner() {
+    set +f
+
+    [ "$3" ] || set -- "$1" "$2" "$sys_db"/*/manifest
+
+    pkg_owner=$(grep "$@")
+    pkg_owner=${pkg_owner%/*}
+    pkg_owner=${pkg_owner##*/}
+
+    set -f -- "$pkg_owner"; unset pkg_owner
+    [ "$1" ] && printf '%s\n' "$1"
+}
+
 pkg_isbuilt() (
     # Check if a package is built or not.
     read -r ver rel < "$(pkg_find "$1")/version"