Re: [PATCH 3/3] git help: group common commands by theme

> On Mon, May 4, 2015 at 4:28 PM, Sébastien Guimmara
> <sebastien.guimmara@gmail.com> wrote:
>> 'git help' shows common commands in alphabetical order:
>>
>> The most commonly used git commands are:
>>     add        Add file contents to the index
>>     bisect     Find by binary search the change that introduced a bug
>>     branch     List, create, or delete branches
>>     checkout   Checkout a branch or paths to the working tree
>>     clone      Clone a repository into a new directory
>>     commit     Record changes to the repository
>>     [...]
>>
>> without any indication of how commands relate to high-level
>> concepts or each other. Revise the output to group commands by
>> concept, like this:
>>
>> The most commonly used git commands are:
>>
>>     * starting a working area:
>>        clone      Clone a repository into a new directory
>>        init       Create an empty Git repository or reinitialize an existing one
>>
>>     * working on the current change:
>>        add        Add file contents to the index
>>        reset      Reset current HEAD to the specified state
>>        [...]
>
> This looks better. A couple minor style nits and a question below...
>
>> ---
>> diff --git a/help.c b/help.c
>> index 2072a87..c8b0bb6 100644
>> --- a/help.c
>> +++ b/help.c
>> @@ -218,18 +218,44 @@ void list_commands(unsigned int colopts,
>>          }
>>   }
>>
>> +int cmd_group_cmp(const void *elem1, const void *elem2)
>> +{
>> +       int group1, group2;
>> +
>> +       group1 = ((struct cmdname_help *) elem1)->group;
>> +       group2 = ((struct cmdname_help *) elem2)->group;
>
> Style: Drop space after the cast: (type *)var
>
>> +
>> +       if (group1 == group2)
>> +               return 0;
>> +       if (group1 > group2)
>> +               return 1;
>> +       else
>> +               return -1;
>
> Do you also want to sort the commands alphabetically within group?
> That is, something like this?
>
>      struct cmdname_help *e1 = elem1;
>      struct cmdname_help *e2 = elem2;
>
>      if (e1->group < e2->group)
>          return -1;
>      if (e1->group > e2->group)
>          return 1;
>      return strcmp(e1->name, e2->name);
>

>> +}
>> +
>>   void list_common_cmds_help(void)
>>   {
>>          int i, longest = 0;
>> +       unsigned char current_grp = -1;
>>
>>          for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
>>                  if (longest < strlen(common_cmds[i].name))
>>                          longest = strlen(common_cmds[i].name);
>>          }
>>
>> +       qsort(common_cmds, ARRAY_SIZE(common_cmds),
>> +               sizeof(common_cmds[0]), cmd_group_cmp);
>> +
>>          puts(_("The most commonly used git commands are:"));
>> +
>>          for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
>> -               printf("   %s   ", common_cmds[i].name);
>> +               if (common_cmds[i].group != current_grp) {
>> +                       printf("\n   * %s:\n", _(common_cmd_groups[common_cmds[i].group]));
>> +               }
>
> Style: Drop unnecessary braces.