utils: Display bundled bwrap arguments one per line

This makes them easier to deal with when debugging. Otherwise, it's easy
for the bundled arguments to wrap across 50 or more lines, and with
linebreaks in arbitrary positions that becomes very hard to read.

Signed-off-by: Simon McVittie <smcv@collabora.com>

3 files changed, 19 insertions, 7 deletions

diff --git a/common/flatpak-bwrap.c b/common/flatpak-bwrap.c
index 6a02e868..6d8dc5b5 100644
--- a/common/flatpak-bwrap.c
+++ b/common/flatpak-bwrap.c
@@ -347,10 +347,21 @@ flatpak_bwrap_bundle_args (FlatpakBwrap *bwrap,
 
   fd = glnx_steal_fd (&args_tmpf.fd);
 
-  {
-    g_autofree char *commandline = flatpak_quote_argv ((const char **) bwrap->argv->pdata + start, end - start);
-    flatpak_debug2 ("bwrap --args %d = %s", fd, commandline);
-  }
+  flatpak_debug2 ("bwrap --args %d = ...", fd);
+
+  for (i = start; i < end; i++)
+    {
+      if (flatpak_argument_needs_quoting (bwrap->argv->pdata[i]))
+        {
+          g_autofree char *quoted = g_shell_quote (bwrap->argv->pdata[i]);
+
+          flatpak_debug2 ("    %s", quoted);
+        }
+      else
+        {
+          flatpak_debug2 ("    %s", (const char *) bwrap->argv->pdata[i]);
+        }
+    }
 
   flatpak_bwrap_add_fd (bwrap, fd);
   g_ptr_array_remove_range (bwrap->argv, start, end - start);
diff --git a/common/flatpak-utils-private.h b/common/flatpak-utils-private.h
index 84c458f5..97b77196 100644
--- a/common/flatpak-utils-private.h
+++ b/common/flatpak-utils-private.h
@@ -593,6 +593,7 @@ GList *flatpak_list_extensions (GKeyFile   *metakey,
                                 const char *arch,
                                 const char *branch);
 
+gboolean flatpak_argument_needs_quoting (const char *arg);
 char * flatpak_quote_argv (const char *argv[],
                            gssize      len);
 gboolean flatpak_file_arg_has_suffix (const char *arg,
diff --git a/common/flatpak-utils.c b/common/flatpak-utils.c
index 56cbb06d..6e5bd6b3 100644
--- a/common/flatpak-utils.c
+++ b/common/flatpak-utils.c
@@ -1412,8 +1412,8 @@ flatpak_switch_symlink_and_remove (const char *symlink_path,
   return flatpak_fail (error, "flatpak_switch_symlink_and_remove looped too many times");
 }
 
-static gboolean
-needs_quoting (const char *arg)
+gboolean
+flatpak_argument_needs_quoting (const char *arg)
 {
   while (*arg != 0)
     {
@@ -1443,7 +1443,7 @@ flatpak_quote_argv (const char *argv[],
       if (i != 0)
         g_string_append_c (res, ' ');
 
-      if (needs_quoting (argv[i]))
+      if (flatpak_argument_needs_quoting (argv[i]))
         {
           g_autofree char *quoted = g_shell_quote (argv[i]);
           g_string_append (res, quoted);