Quote shell commands in logs from build-many-glibcs.py.

As requested in
<https://sourceware.org/ml/libc-alpha/2016-11/msg00664.html>, this
patch makes the commands recorded in build-many-glibcs.py quote words
so they can be cut-and-pasted back into a shell.  (Note that these
logs are generated by the wrapper script generated to run commands
with logs, hence the needs for quoting logic to be implemented in that
shell script.)

	* scripts/build-many-glibcs.py (Context.write_files): Make wrapper
	script quote words in command output to log suitably for input to
	the shell.

1 files changed, 11 insertions, 1 deletions

diff --git a/scripts/build-many-glibcs.py b/scripts/build-many-glibcs.py
index b0e0f5e..517dec4 100755
--- a/scripts/build-many-glibcs.py
+++ b/scripts/build-many-glibcs.py
@@ -423,7 +423,17 @@ class Context(object):
             'date > "$this_log"\n'
             'echo >> "$this_log"\n'
             'echo "Description: $desc" >> "$this_log"\n'
-            'echo "Command: $*" >> "$this_log"\n'
+            'printf "%s" "Command:" >> "$this_log"\n'
+            'for word in "$@"; do\n'
+            '  if expr "$word" : "[]+,./0-9@A-Z_a-z-]\\\\{1,\\\\}\\$" > /dev/null; then\n'
+            '    printf " %s" "$word"\n'
+            '  else\n'
+            '    printf " \'"\n'
+            '    printf "%s" "$word" | sed -e "s/\'/\'\\\\\\\\\'\'/"\n'
+            '    printf "\'"\n'
+            '  fi\n'
+            'done >> "$this_log"\n'
+            'echo >> "$this_log"\n'
             'echo "Directory: $dir" >> "$this_log"\n'
             'echo "Path addition: $path" >> "$this_log"\n'
             'echo >> "$this_log"\n'