Adopt `potodo` in Makefile

I found a tool named potodo that provides same functionalities with part of our current Makefile commands but has better format. We can consider adopting this tool in our Makefile (or even storing the output as a file and updating it whenever a PR is merged).

• Listing untranslated files

  • make todo

    > make todo           
    for file in *.po */*.po; do echo $(msgattrib --untranslated $file | grep ^msgid | sed 1d | wc -l ) $file; done | grep -v ^0 | sort -gr
    929 library/stdtypes.po
    790 library/os.po
    660 whatsnew/3.3.po
    633 library/curses.po
    577 c-api/typeobj.po
    555 whatsnew/3.7.po
    554 library/datetime.po
    539 whatsnew/3.5.po
    539 whatsnew/2.6.po
    518 whatsnew/3.2.po
    517 whatsnew/3.6.po
    ...
    

  • potodo

    > potodo
    # extending (3.17% done)
    
    - building.po                      0 /  23 (  0.0% translated)
    - embedding.po                     1 /  45 (  2.0% translated)
    - extending.po                     2 / 158 (  1.0% translated)
    - newtypes.po                      0 /  91 (  0.0% translated)
    - newtypes_tutorial.po             0 / 123 (  0.0% translated)
    - windows.po                       0 /  21 (  0.0% translated)
    
    
    # faq (10.27% done)
    
    - design.po                       13 / 141 (  9.0% translated), 2 fuzzy
    - extending.po                     0 /  60 (  0.0% translated)
    - general.po                      33 /  91 ( 36.0% translated)
    - gui.po                           2 /  17 ( 11.0% translated)
    - library.po                      11 / 142 (  7.0% translated)
    - programming.po                  13 / 372 (  3.0% translated)
    - windows.po                       3 /  47 (  6.0% translated)
    ...
    

• Listing fuzzy entries

  • make fuzzy

    > make fuzzy
    for file in *.po */*.po; do echo $(msgattrib --only-fuzzy --no-obsolete "$file" | grep -c '#, fuzzy') $file; done | grep -v ^0 | sort -gr
    163 library/functions.po
    8 library/statistics.po
    5 c-api/function.po
    5 c-api/datetime.po
    4 library/unittest.po
    3 library/heapq.po
    ...
    

  • potodo --only-fuzzy

    > potodo -f
    # c-api (5.20% done)
    
    - datetime.po                      8 /  41 ( 19.0% translated), 5 fuzzy
    - dict.po                          5 /  30 ( 16.0% translated), 1 fuzzy
    - function.po                      4 /  18 ( 22.0% translated), 5 fuzzy
    - unicode.po                       5 / 334 (  1.0% translated), 1 fuzzy
    
    
    # distutils (0.00% done)
    
    - examples.po                      0 /  46 (  0.0% translated), 1 fuzzy
    
    
    # faq (9.22% done)
    
    - design.po                       13 / 141 (  9.0% translated), 2 fuzzy
    ...
    

• Get overall progress

  • make progress

    > make progress
    4.4%
    

  • potodo | tail -n2 | head -n1 | cut -c 10- | sed 's/[%].*$/%/g'

    > potodo | tail -n2 | head -n1 | cut -c 10- |  sed 's/[%].*$/%/g'
    4.31%
    

先从仓库 Makefile 中用于 todo、fuzzy 和 progress 的命令开始，然后将它们的输出与本 issue 中记录的 potodo 示例进行比较。检查在 Makefile 中应如何调用 potodo，以及其输出应继续作为命令结果，还是应存储为文件。选定的翻译状态命令能够提供预期的 potodo 风格结果，即表示完成。