PR27783: switch default debuginfod-urls to drop-in style files

Rewrote and commented the /etc/profile.d csh and sh script fragments
to take the default $DEBUGINFOD_URLS from the union of drop-in files:
/etc/debuginfod/*.urls.  Hand-tested with csh and bash, with
conditions including no prior $DEBUGINFOD_URLS, nonexistent .urls
files, multiple entries in .urls files.

Signed-off-by: Frank Ch. Eigler <fche@redhat.com>

6 files changed, 54 insertions, 14 deletions

diff --git a/NEWS b/NEWS
index a73d39ec..aaef458c 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,9 @@
+Version 0.186
+
+debuginfod-client: Default $DEBUGINFOD_URLS is computed from drop-in files
+                   /etc/debuginfod/*.urls rather than hardcoded into the
+                   /etc/profile.d/debuginfod* scripts.
+
 Version 0.185
 
 debuginfod-client: Simplify curl handle reuse so downloads which
diff --git a/config/ChangeLog b/config/ChangeLog
index b2c0af8a..bd41654f 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,11 @@
+2021-10-03  Frank Ch. Eigler  <fche@redhat.com>
+
+	PR27783
+	* profile.sh, profile.csh: Rewrite to document and set DEBUGINFOD_URLS
+	from /etc/debuginfod/*.urls files.
+	* Makefile.am: Install the configury-specified .urls file.
+	* elfutils.spec: Package it.
+
 2021-09-05  Dmitry V. Levin  <ldv@altlinux.org>
 
 	* eu.am (STACK_USAGE_NO_ERROR): New variable.
diff --git a/config/Makefile.am b/config/Makefile.am
index a66f5490..0d3ba164 100644
--- a/config/Makefile.am
+++ b/config/Makefile.am
@@ -40,9 +40,16 @@ pkgconfig_DATA += libdebuginfod.pc
 install-data-local:
 	$(INSTALL_DATA) profile.sh -D $(DESTDIR)$(sysconfdir)/profile.d/debuginfod.sh
 	$(INSTALL_DATA) profile.csh -D $(DESTDIR)$(sysconfdir)/profile.d/debuginfod.csh
+	mkdir -p $(DESTDIR)$(sysconfdir)/debuginfod
+	if [ -n "@DEBUGINFOD_URLS@" ]; then \
+		echo "@DEBUGINFOD_URLS@" > $(DESTDIR)$(sysconfdir)/debuginfod/elfutils.urls; \
+	fi
 
 uninstall-local:
-	rm -f $(DESTDIR)$(sysconfdir)/profile.d/debuginfod.sh $(DESTDIR)$(sysconfdir)/profile.d/debuginfod.csh
+	rm -f $(DESTDIR)$(sysconfdir)/profile.d/debuginfod.sh
+	rm -f $(DESTDIR)$(sysconfdir)/profile.d/debuginfod.csh
+	rm -f $(DESTDIR)$(sysconfdir)/debuginfod/elfutils.urls
+	-rmdir $(DESTDIR)$(sysconfdir)/debuginfod
 endif
 
 if MAINTAINER_MODE
diff --git a/config/elfutils.spec.in b/config/elfutils.spec.in
index 04376265..8f6a8e03 100644
--- a/config/elfutils.spec.in
+++ b/config/elfutils.spec.in
@@ -301,6 +301,7 @@ fi
 %{_mandir}/man1/debuginfod-find.1*
 %{_mandir}/man7/debuginfod*.7*
 %config(noreplace) %{_sysconfdir}/profile.d/*
+%config(noreplace) %{_sysconfdir}/debuginfod/*
   
 %files debuginfod-client-devel
 %defattr(-,root,root)
diff --git a/config/profile.csh.in b/config/profile.csh.in
index 0a2d6d16..01f7c2f2 100644
--- a/config/profile.csh.in
+++ b/config/profile.csh.in
@@ -1,11 +1,16 @@
-if ("@DEBUGINFOD_URLS@" != "") then
-	if ($?DEBUGINFOD_URLS) then
-		if ($%DEBUGINFOD_URLS) then
-			setenv DEBUGINFOD_URLS "$DEBUGINFOD_URLS @DEBUGINFOD_URLS@"
-		else
-			setenv DEBUGINFOD_URLS "@DEBUGINFOD_URLS@"
-		endif
-	else
-		setenv DEBUGINFOD_URLS "@DEBUGINFOD_URLS@"
-	endif
+
+# $HOME/.login* or similar files may first set $DEBUGINFOD_URLS.
+# If $DEBUGINFOD_URLS is not set there, we set it from system *.url files.
+# $HOME/.*rc or similar files may then amend $DEBUGINFOD_URLS.
+# See also [man debuginfod-client-config] for other environment variables
+# such as $DEBUGINFOD_MAXSIZE, $DEBUGINFOD_MAXTIME, $DEBUGINFOD_PROGRESS.
+
+if (! $?DEBUGINFOD_URLS) then
+    set prefix="@prefix@"
+    set debuginfod_urls=`sh -c "cat @sysconfdir@/debuginfod/*.urls 2>/dev/null" | tr '\n' ' '`
+    if ( "$debuginfod_urls" != "" ) then
+        setenv DEBUGINFOD_URLS "$debuginfod_urls"
+    endif
+    unset debuginfod_urls
+    unset prefix
 endif
diff --git a/config/profile.sh.in b/config/profile.sh.in
index aa228a0d..afce3963 100644
--- a/config/profile.sh.in
+++ b/config/profile.sh.in
@@ -1,4 +1,17 @@
-if [ -n "@DEBUGINFOD_URLS@" ]; then
-	DEBUGINFOD_URLS="${DEBUGINFOD_URLS-}${DEBUGINFOD_URLS:+ }@DEBUGINFOD_URLS@"
-	export DEBUGINFOD_URLS
+
+# $HOME/.profile* or similar files may first set $DEBUGINFOD_URLS.
+# If $DEBUGINFOD_URLS is not set there, we set it from system *.url files.
+# $HOME/.*rc or similar files may then amend $DEBUGINFOD_URLS.
+# See also [man debuginfod-client-config] for other environment variables
+# such as $DEBUGINFOD_MAXSIZE, $DEBUGINFOD_MAXTIME, $DEBUGINFOD_PROGRESS.
+
+if [ -z "$DEBUGINFOD_URLS" ]; then
+    prefix="@prefix@"
+    debuginfod_urls=`sh -c "cat @sysconfdir@/debuginfod/*.urls 2>/dev/null" | tr '\n' ' '`
+    if [ -n "$debuginfod_urls" ]; then
+        DEBUGINFOD_URLS="$debuginfod_urls"
+        export DEBUGINFOD_URLS
+    fi
+    unset debuginfod_urls
+    unset prefix
 fi