[Bash-autocompletion] Fix a bug that -foo=bar doesn't handled properly

[yamaguchi]

Summary

Fixed a bug that -foo=bar wasn't handled properly on old version of bash.

[ruiu]

clang/utils/bash-autocomplete.sh

37

I think you can do "$cur" == -*=.

[yamaguchi]

Update diff.
Thanks for the pointing out.

[v.g.vassilev]

LGTM.

clang/utils/bash-autocomplete.sh

if [[ $cword > 1 ]]; then
     w2="${COMP_WORDS[$cword - 2]}"
   fi
   if [[ "$cur" == -* ]]; then
     # -foo<tab>
     arg="$cur"
   elif [[ "$w1" == -*  && "$cur" == '=' ]]; then
     # -foo=<tab>
     arg="$w1=,"
+  elif [[ ${cur:0:1} == '-' && ${cur: -1} == '=' ]]; then
+    # -foo=<tab>
+    arg="$cur,"
   elif [[ "$w1" == -* ]]; then
     # -foo <tab> or -foo bar<tab>
     arg="$w1,$cur"
   elif [[ "$w2" == -* && "$w1" == '=' ]]; then
     # -foo=bar<tab>
     arg="$w2=,$cur"
+  elif [[ ${cur: -1} != '=' && ${cur/=} != $cur ]]; then
+    # -foo=bar<tab>
+    arg="${cur%=*}=,${cur#*=}"
   fi
 
   # expand ~ to $HOME
   eval local path=${COMP_WORDS[0]}
   flags=$( "$path" --autocomplete="$arg" 2>/dev/null )
   # If clang is old that it does not support --autocomplete,
   # fall back to the filename completion.
   if [[ "$?" != 0 ]]; then