Basic branch/tag completion for git(1)

1 files changed, 39 insertions, 0 deletions

diff --git a/bash/bashrc.d/git.bash b/bash/bashrc.d/git.bash
new file mode 100644
index 00000000..91b46f2a
--- /dev/null
+++ b/bash/bashrc.d/git.bash
@@ -0,0 +1,39 @@
+# Bail if no git(1)
+if ! hash git 2>/dev/null; then
+    return
+fi
+
+# Completion for git local branch names
+_git() {
+
+    # Bail if not a git repo
+    if ! git rev-parse --git-dir >/dev/null 2>&1 ; then
+        return 1
+    fi
+
+    # Get current and previous word
+    local word=${COMP_WORDS[COMP_CWORD]}
+    local prev=${COMP_WORDS[COMP_CWORD-1]}
+
+    # Switch on the previous word
+    case $prev in
+
+        # If the previous word is appropriate, complete with branch/tag names
+        checkout|merge|rebase)
+            local -a branches
+            local branch
+            while read -r branch ; do
+                branches=("${branches[@]}" "${branch##*/}")
+            done < <(git for-each-ref refs/{heads,tags} 2>/dev/null)
+            COMPREPLY=( $(compgen -W "${branches[*]}" -- "$word") )
+            return
+            ;;
+
+        # Bail if it isn't
+        *)
+            return 1
+            ;;
+    esac
+}
+complete -F _git -o default git
+