[PATCH 00/12] Support columinized output in tag/branch/ls-files/grep

This adds support to show columnized output in the mentioned commands. I am quite happy with columnized "git branch/tag".

There is still room for improvement. For example, if "git column" is going to display all items in one or two lines (too wide screen), then falling back to one column mode would be better.

I'm also experimenting aligned grep output. While it's useful sometimes to look for things near the beginning of line, I don't know if it's really worth the effort.

Anyway, enjoy the new output (Hmm.. "git config -l" may be applicable for columnization too)

Nguyễn Thái Ngọc Duy (12):
  Move term_columns() to pager.c
  setup_pager(): save terminal width before redirecting stdout
  Add columnizer
  help: use columnizer
  Add builtin command "column"
  Add helpers to redirect stdout to "git column"
  add core.columns
  tag: support column output with --columns
  branch: support column output with --columns
  ls-files: support column output with --columns
  grep: do not return early in cmd_grep() if there is no error
  grep: support column output with --columns

 .gitignore                   |    1 +
 Documentation/config.txt     |    8 ++
 Documentation/git-branch.txt |    8 ++
 Documentation/git-column.txt |   40 ++++++++++
 Documentation/git-grep.txt   |   10 +++
 Documentation/git-tag.txt    |   11 +++-
 Makefile                     |    3 +
 builtin.h                    |    1 +
 builtin/branch.c             |   18 ++++-
 builtin/column.c             |   42 +++++++++++
 builtin/grep.c               |   48 +++++++------
 builtin/ls-files.c           |   10 +++
 builtin/tag.c                |   17 ++++-
 cache.h                      |    2 +
 column.c                     |  164 ++++++++++++++++++++++++++++++++++++++++++
 column.h                     |   25 +++++++
 command-list.txt             |    1 +
 config.c                     |    6 ++
 environment.c                |    1 +
 git.c                        |    1 +
 help.c                       |   55 +++-----------
 pager.c                      |   95 ++++++++++++++++++++++++
 t/t9002-column.sh            |  101 ++++++++++++++++++++++++++
 23 files changed, 595 insertions(+), 73 deletions(-)
 create mode 100644 Documentation/git-column.txt
 create mode 100644 builtin/column.c
 create mode 100644 column.c
 create mode 100644 column.h
 create mode 100755 t/t9002-column.sh