Branches - Git Recipes - page 172

origin/doc
origin/info
origin/master
Therefore, we know that the original repository contains three branches named doc ,
info , and master . The first alias, $ git list-remote-branches , converts
the above output in a following way:
• First it removes the item that contains -> characters (this item informs
us that in the original repository HEAD contains the symbolic reference to
origin/master ).
• Then, it deletes the prefixes origin/ .
Both operations are performed by the stream editor sed . The following shell com-
mand:
$ git branch -r | sed "/->/d"
removes the line that contains -> . The syntax to filter out some lines with sed is:
$ sed "/PATTERN/d"
The above command filters out all the lines that contain the PATTERN .
To remove prefix origin/ we use sed's substitution command—its syntax is
the following:
$ sed "s/PATTERN/REPLACEMENT/"
where PATTERN defines the strings that will be replaced, REPLACEMENT is a new
string, slashes are used as separators, and s stands for substitute.
The command:
$ git branch -r | sed "s/ origin\///g"
replaces all occurrences of origin/ with an empty string. Because our PATTERN
contains a slash we have to escape it with \ .
When we combine both sed commands using a semicolon as a separator into one
processing instruction: