[PATCH] scripts/find-debuginfo.in: Add -q|--quiet

[Prarit Bhargava]

Projects with a large number of compiled files end up with a large number
of 'extracting debug info from' messages in the build log.  In the case of
the Fedora kernel these messages account for 8504 lines in the log, or 61%
of the entire log [1].

Removing these lines make the log easier to view and comprehend for some
projects, however, not all projects will want to silence these messages so
suppressing them must be optional.

Add a -q|--quiet which allows users to silence the non-error output from
the script.

[1] https://kojipkgs.fedoraproject.org//packages/kernel/6.2.0/0.rc5.20230123git2475bf0250de.38.fc38/data/logs/x86_64/build.log

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
---
 scripts/find-debuginfo.in | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/scripts/find-debuginfo.in b/scripts/find-debuginfo.in
index b07a52fe4b98..e55a62cc78f1 100755
--- a/scripts/find-debuginfo.in
+++ b/scripts/find-debuginfo.in
@@ -26,7 +26,7 @@ Usage: find-debuginfo [OPTION]... [builddir]
 automagically generates debug info and file lists
 
 Options:
-[--strict-build-id] [-g] [-r] [-m] [-i] [-n]
+[--strict-build-id] [-g] [-r] [-m] [-i] [-n] [-q]
 [--keep-section SECTION] [--remove-section SECTION]
 [--g-libs]
 [-j N] [--jobs N]
@@ -94,6 +94,8 @@ will be called /usr/debug/src/<BASE>.  This makes sure the debug source
 dirs are unique between package version, release and achitecture (Use
 --unique-debug-src-base "%{name}-%{VERSION}-%{RELEASE}.%{_arch}")
 
+The -q or --quiet flag silences non-error output from the script.
+
 All file names in switches are relative to builddir ('.' if not given).
 EOF
 }
@@ -146,6 +148,9 @@ n_jobs=1
 # exit early on --version or --help
 done=false
 
+# silence non-error output
+quiet=false
+
 BUILDDIR=.
 out=debugfiles.list
 srcout=
@@ -239,6 +244,9 @@ while [ $# -gt 0 ]; do
     srcout=$2
     shift
     ;;
+  -q|--quiet)
+    quiet=true
+    ;;
   --version)
     echo "find-debuginfo @VERSION@"
     done=true;
@@ -437,7 +445,7 @@ do_file()
   get_debugfn "$f"
   [ -f "${debugfn}" ] && return
 
-  echo "extracting debug info from $f"
+  $quiet || echo "extracting debug info from $f"
   # See also cpio SOURCEFILE copy. Directories must match up.
   debug_base_name="$RPM_BUILD_DIR"
   debug_dest_name="/usr/src/debug"
@@ -513,7 +521,7 @@ do_file()
     grep "^$inum " "$temp/linked" | while read inum linked; do
       link=$debugfn
       get_debugfn "$linked"
-      echo "hard linked $link to $debugfn"
+      $quiet || echo "hard linked $link to $debugfn"
       mkdir -p "$(dirname "$debugfn")" && ln -nf "$link" "$debugfn"
     done
   fi
@@ -576,7 +584,7 @@ if $run_dwz \
    && [ -d "${RPM_BUILD_ROOT}/usr/lib/debug" ]; then
   readarray dwz_files < <(cd "${RPM_BUILD_ROOT}/usr/lib/debug"; find -type f -name \*.debug | LC_ALL=C sort)
   if [ ${#dwz_files[@]} -gt 0 ]; then
-    size_before=$(du -sk ${RPM_BUILD_ROOT}/usr/lib/debug | cut -f1)
+    $quiet || size_before=$(du -sk ${RPM_BUILD_ROOT}/usr/lib/debug | cut -f1)
     dwz_multifile_name="${RPM_PACKAGE_NAME}-${RPM_PACKAGE_VERSION}-${RPM_PACKAGE_RELEASE}.${RPM_ARCH}"
     dwz_multifile_suffix=
     dwz_multifile_idx=0
@@ -599,8 +607,8 @@ if $run_dwz \
       echo >&2 "*** ERROR: DWARF compression requested, but no dwz installed"
       exit 2
     fi
-    size_after=$(du -sk ${RPM_BUILD_ROOT}/usr/lib/debug | cut -f1)
-    echo "original debug info size: ${size_before}kB, size after compression: ${size_after}kB"
+    $quiet || size_after=$(du -sk ${RPM_BUILD_ROOT}/usr/lib/debug | cut -f1)
+    $quiet || echo "original debug info size: ${size_before}kB, size after compression: ${size_after}kB"
     # Remove .dwz directory if empty
     rmdir "${RPM_BUILD_ROOT}/usr/lib/debug/.dwz" 2>/dev/null
 
@@ -620,7 +628,7 @@ do
   f=${f#$RPM_BUILD_ROOT}
   t=${t#$RPM_BUILD_ROOT}
   if [ -f "$debugdir$t" ]; then
-    echo "symlinked /usr/lib/debug$t to /usr/lib/debug${f}.debug"
+    $quiet || echo "symlinked /usr/lib/debug$t to /usr/lib/debug${f}.debug"
     debug_link "/usr/lib/debug$t" "${f}.debug"
   fi
 done
-- 
2.39.1