use xsnprintf for generating git object headers
[git] / git-parse-remote.sh
1 # This is a shell library to calculate the remote repository and
2 # upstream branch that should be pulled by "git pull" from the current
3 # branch.
4
5 # git-ls-remote could be called from outside a git managed repository;
6 # this would fail in that case and would issue an error message.
7 GIT_DIR=$(git rev-parse -q --git-dir) || :;
8
9 get_default_remote () {
10         curr_branch=$(git symbolic-ref -q HEAD)
11         curr_branch="${curr_branch#refs/heads/}"
12         origin=$(git config --get "branch.$curr_branch.remote")
13         echo ${origin:-origin}
14 }
15
16 get_remote_merge_branch () {
17         case "$#" in
18         0|1)
19             origin="$1"
20             default=$(get_default_remote)
21             test -z "$origin" && origin=$default
22             curr_branch=$(git symbolic-ref -q HEAD) &&
23             [ "$origin" = "$default" ] &&
24             echo $(git for-each-ref --format='%(upstream)' $curr_branch)
25             ;;
26         *)
27             repo=$1
28             shift
29             ref=$1
30             # FIXME: It should return the tracking branch
31             #        Currently only works with the default mapping
32             case "$ref" in
33             +*)
34                 ref=$(expr "z$ref" : 'z+\(.*\)')
35                 ;;
36             esac
37             expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
38             remote=$(expr "z$ref" : 'z\([^:]*\):')
39             case "$remote" in
40             '' | HEAD ) remote=HEAD ;;
41             heads/*) remote=${remote#heads/} ;;
42             refs/heads/*) remote=${remote#refs/heads/} ;;
43             refs/* | tags/* | remotes/* ) remote=
44             esac
45             [ -n "$remote" ] && case "$repo" in
46                 .)
47                     echo "refs/heads/$remote"
48                     ;;
49                 *)
50                     echo "refs/remotes/$repo/$remote"
51                     ;;
52             esac
53         esac
54 }
55
56 error_on_missing_default_upstream () {
57         cmd="$1"
58         op_type="$2"
59         op_prep="$3"
60         example="$4"
61         branch_name=$(git symbolic-ref -q HEAD)
62         # If there's only one remote, use that in the suggestion
63         remote="<remote>"
64         if test $(git remote | wc -l) = 1
65         then
66                 remote=$(git remote)
67         fi
68
69         if test -z "$branch_name"
70         then
71                 echo "You are not currently on a branch. Please specify which
72 branch you want to $op_type $op_prep. See git-${cmd}(1) for details.
73
74     $example
75 "
76         else
77                 echo "There is no tracking information for the current branch.
78 Please specify which branch you want to $op_type $op_prep.
79 See git-${cmd}(1) for details
80
81     $example
82
83 If you wish to set tracking information for this branch you can do so with:
84
85     git branch --set-upstream-to=$remote/<branch> ${branch_name#refs/heads/}
86 "
87         fi
88         exit 1
89 }