Add support for setting $DEBUGINFOD_URLS automatically in the fish shell
similar to the profile scripts for POSIX and csh shells.

Makefile is set to install this into fish’s $XDG_DATA_DIRS vendor
directory instead of under /etc:
https://fishshell.com/docs/current/language.html#configuration-files

        * config/profile.fish.in: Set $DEBUGINFOD_URLS in fish shells.
        * configure.ac, config/Makefile.am: Include profile.fish in
          install and uninstall targets.

Signed-off-by: Frederik “Freso” S. Olesen <freso...@gmail.com>
---
 config/Makefile.am     |  5 ++++-
 config/profile.fish.in | 14 ++++++++++++++
 configure.ac           |  2 +-
 3 files changed, 19 insertions(+), 2 deletions(-)
 create mode 100644 config/profile.fish.in

diff --git a/config/Makefile.am b/config/Makefile.am
index 0d3ba164..ae14e625 100644
--- a/config/Makefile.am
+++ b/config/Makefile.am
@@ -30,7 +30,8 @@
 ##
 EXTRA_DIST = elfutils.spec.in known-dwarf.awk 10-default-yama-scope.conf \
             libelf.pc.in libdw.pc.in libdebuginfod.pc.in \
-            debuginfod.service debuginfod.sysconfig profile.sh.in 
profile.csh.in
+            debuginfod.service debuginfod.sysconfig \
+            profile.sh.in profile.csh.in profile.fish.in
 
 pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = libelf.pc libdw.pc
@@ -40,6 +41,7 @@ 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
+       $(INSTALL_DATA) profile.fish -D 
$(DESTDIR)$(datadir)/fish/vendor_conf.d/debuginfod.fish
        mkdir -p $(DESTDIR)$(sysconfdir)/debuginfod
        if [ -n "@DEBUGINFOD_URLS@" ]; then \
                echo "@DEBUGINFOD_URLS@" > 
$(DESTDIR)$(sysconfdir)/debuginfod/elfutils.urls; \
@@ -48,6 +50,7 @@ install-data-local:
 uninstall-local:
        rm -f $(DESTDIR)$(sysconfdir)/profile.d/debuginfod.sh
        rm -f $(DESTDIR)$(sysconfdir)/profile.d/debuginfod.csh
+       rm -f $(DESTDIR)$(datadir)/fish/vendor_conf.d/debuginfod.fish
        rm -f $(DESTDIR)$(sysconfdir)/debuginfod/elfutils.urls
        -rmdir $(DESTDIR)$(sysconfdir)/debuginfod
 endif
diff --git a/config/profile.fish.in b/config/profile.fish.in
new file mode 100644
index 00000000..00e9ca59
--- /dev/null
+++ b/config/profile.fish.in
@@ -0,0 +1,14 @@
+# $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, $DEBUGINFOD_PROGRESS.
+
+if not set --query DEBUGINFOD_URLS
+    # Use local variables so we don't need to manually unset them
+    set --local prefix "@prefix@"
+    set --local DEBUGINFOD_URLS (cat /dev/null 
"@sysconfdir@/debuginfod"/*.urls 2>/dev/null | string replace '\n' ' ')
+    if test -n "$DEBUGINFOD_URLS"
+        set --global --export DEBUGINFOD_URLS "$DEBUGINFOD_URLS"
+    end
+end
diff --git a/configure.ac b/configure.ac
index 098d1306..a279bb52 100644
--- a/configure.ac
+++ b/configure.ac
@@ -881,7 +881,7 @@ AC_ARG_ENABLE(debuginfod-urls,
              fi],
             [default_debuginfod_urls=""])
 AC_SUBST(DEBUGINFOD_URLS, $default_debuginfod_urls)                
-AC_CONFIG_FILES([config/profile.sh config/profile.csh])
+AC_CONFIG_FILES([config/profile.sh config/profile.csh config/profile.fish])
 
 AC_OUTPUT
 
-- 
2.44.0

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