git completion error in bash

Question

在新安装的Debian的Bash下，通过sudo apt-get install git安装后，git的补全出现异常。

$ git <TAB>
^[[1;43m^[[K                c^[[m^[[Kherry              d^[[m^[[Kifftool            h^[[m^[[Kttp-backend        m^[[m^[[Kerge-file          rm 
a^[[m^[[Kdd                 c^[[m^[[Kherry-pick         d^[[m^[[Kiff-tree           h^[[m^[[Kttp-fetch          m^[[m^[[Kerge-index         shortlog 
a^[[m^[[Km                  c^[[m^[[Klean               f^[[m^[[Kast-export         h^[[m^[[Kttp-push           m^[[m^[[Kerge-octopus       show 
a^[[m^[[Knnotate            c^[[m^[[Klone               f^[[m^[[Kast-import         i^[[m^[[Kmap-send           mv                          show-branch 
a^[[m^[[Kpply               c^[[m^[[Kolumn              f^[[m^[[Ketch               i^[[m^[[Kndex-pack          name-rev                    stage 
a^[[m^[[Krchive             c^[[m^[[Kommit              f^[[m^[[Ketch-pack          i^[[m^[[Knit                notes                       stash 
b^[[m^[[Kisect              c^[[m^[[Kommit-tree         f^[[m^[[Kilter-branch       i^[[m^[[Knit-db             pull                        status 
b^[[m^[[Klame               c^[[m^[[Konfig              f^[[m^[[Kmt-merge-msg       i^[[m^[[Knstaweb            push                        submodule 
b^[[m^[[Kranch              c^[[m^[[Kount-objects       f^[[m^[[Kor-each-ref        l^[[m^[[Kog                 rebase                      subtree 
b^[[m^[[Kundle              c^[[m^[[Kredential          f^[[m^[[Kormat-patch        l^[[m^[[Ks-files            reflog                      tag 
c^[[m^[[Kat-file            c^[[m^[[Kredential-cache    f^[[m^[[Ksck                l^[[m^[[Ks-remote           relink                      verify-commit 
c^[[m^[[Kheck-attr          c^[[m^[[Kredential-store    f^[[m^[[Ksck-objects        l^[[m^[[Ks-tree             remote                      whatchanged 
c^[[m^[[Kheck-ignore        d^[[m^[[Kaemon              g^[[m^[[Kc                  mergetool                   repack                      
c^[[m^[[Kheck-mailmap       d^[[m^[[Kescribe            g^[[m^[[Ket-tar-commit-id   m^[[m^[[Kailinfo            replace                     
c^[[m^[[Kheckout            d^[[m^[[Kiff                g^[[m^[[Krep                m^[[m^[[Kailsplit           request-pull                
c^[[m^[[Kheckout-index      d^[[m^[[Kiff-files          h^[[m^[[Kash-object         m^[[m^[[Kerge               reset                       
c^[[m^[[Kheck-ref-format    d^[[m^[[Kiff-index          h^[[m^[[Kelp                m^[[m^[[Kerge-base          revert   

部分是正常的，比如git revert。但是很大一部分，比如git add，由于补全项为git a^[[m^[[Kdd而无法正常使用。

请问：

1. Bash中，这个^[[m^[[K是什么？

2. 如何去除它，让git的补全正常？

（我曾经用过git-completion这个方案，但是它太老，早已不更新，导致新功能补全缺失。）

Answer 1

I emphasize again, a terminal is a terminal, and a Shell is a Shell. There are always people who can’t tell the difference between a terminal and a Shell...

This problem is caused by improper configuration of your terminal. No matter how powerful Bash is, it cannot handle the analysis of ANSI Escape Code. Just like you can't make a black and white monitor display colors if you replace an i3 with an i7.

You have two options:

1. Turn off the coloring of Git completions

2. Adjust your terminal to support ANSI Escape Code

If your Terminal Emulator supports color, changing it $TERM can usually solve the problem. For more detailed instructions, please refer to http://www.tldp.org/HOWTO/Text-Terminal-HOWTO-16.html and the links on this page.

Answer 2

In

Bash, what is this ^[[m^[[K?

is ANSI escape code. ^[ represents the ESC key, and ^[[ is ESC[ represents CSI (Control Sequence Introducer), so ^[表示ESC键，而^[[即ESC[表示 CSI（Control Sequence Introducer），所以^[[m^[[K means CSI m, CSI K. As for what CSI m and CSI K mean, you need to look up the table.

The full form of CSI m is CSInm，表示 SGR – Select Graphic Rendition，即控制台中的文本的渲染效果。其中n是0至多个参数，当没有参数的时候就成了 CSI m，表示重置为默认渲染效果。具体见这里。（自定义控制台的 PS 也是通过这个来设置颜色的。） 例如，问题开头的^[[1;43m which stands for "bold;red" rendering effect.

The full form of

CSI K is when CSInK，表示 EL – Erase in Line，即删除部分行。其中n也是参数，当n is 0 or omitted, that is, CSI K, which means deleting from the cursor position to the end of the line. For other situations, please refer to the description in Wikipedia.