1 files changed, 52 insertions, 0 deletions
diff --git a/bin/git-ps1 b/bin/git-ps1
new file mode 100755
index 000000000000..8a0980091163
--- /dev/null
+++ b/bin/git-ps1
@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+r=
+b=
+g="$(git rev-parse --git-dir 2>/dev/null)"
+
+if [ -n "$g" ]; then
+    if [ -d "$g/../.dotest" ]
+        then
+        if test -f "$g/../.dotest/rebasing"
+            then
+            r="|REBASE"
+        elif test -f "$g/../.dotest/applying"
+            then
+            r="|AM"
+        else
+            r="|AM/REBASE"
+        fi
+        b="$(git symbolic-ref HEAD 2>/dev/null)"
+    elif [ -f "$g/.dotest-merge/interactive" ]
+        then
+        r="|REBASE-i"
+        b="$(cat "$g/.dotest-merge/head-name")"
+    elif [ -d "$g/.dotest-merge" ]
+        then
+        r="|REBASE-m"
+        b="$(cat "$g/.dotest-merge/head-name")"
+    elif [ -f "$g/MERGE_HEAD" ]
+        then
+        r="|MERGING"
+        b="$(git symbolic-ref HEAD 2>/dev/null)"
+    else
+        if [ -f "$g/BISECT_LOG" ]
+            then
+            r="|BISECTING"
+        fi
+        if ! b="$(git symbolic-ref HEAD 2>/dev/null)"
+            then
+            if ! b="$(git describe --exact-match HEAD 2>/dev/null)"
+                then
+                b="$(cut -c1-7 "$g/HEAD")..."
+            fi
+        fi
+    fi
+
+    if [ -n "$1" ]; then
+        printf "$1" "${b##refs/heads/}$r"
+    else
+        printf "%s" "${b##refs/heads/}$r"
+    fi
+else
+    printf "not-in-git"
+fi