init

.zprezto/modules/git/functions/git-branch-current

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+#
+# Displays the current Git branch.
+#
+# Authors:
+#   Sorin Ionescu <sorin.ionescu@gmail.com>
+#
+
+if ! git rev-parse 2> /dev/null; then
+  print "$0: not a repository: $PWD" >&2
+  return 1
+fi
+
+local ref="$(git symbolic-ref HEAD 2> /dev/null)"
+
+if [[ -n "$ref" ]]; then
+  print "${ref#refs/heads/}"
+  return 0
+else
+  return 1
+fi