X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=Documentation%2Fgit-sh-setup.txt;h=2b2abebd608be337db35a3de4b83d37d43061acb;hb=99f171bb7ac5032dde256c02476240c0d019a5fe;hp=a02a2b051c1463604f69d9f06c8825f8e720ab34;hpb=0493a3fd5204a36bc961a8611770ddb9ec1ed8ed;p=git.git

diff --git a/Documentation/git-sh-setup.txt b/Documentation/git-sh-setup.txt
index a02a2b051..2b2abebd6 100644
--- a/Documentation/git-sh-setup.txt
+++ b/Documentation/git-sh-setup.txt
@@ -3,7 +3,7 @@ git-sh-setup(1)
 
 NAME
 ----
-git-sh-setup - Common git shell script setup code.
+git-sh-setup - Common git shell script setup code
 
 SYNOPSIS
 --------
@@ -12,13 +12,51 @@ SYNOPSIS
 DESCRIPTION
 -----------
 
-Sets up the normal git environment variables and a few helper functions
-(currently just "die()"), and returns ok if it all looks like a git archive.
-So use it something like
+This is not a command the end user would want to run.  Ever.
+This documentation is meant for people who are studying the
+Porcelain-ish scripts and/or are writing new ones.
 
-	. git-sh-setup || die "Not a git archive"
+The `git-sh-setup` scriptlet is designed to be sourced (using
+`.`) by other shell scripts to set up some variables pointing at
+the normal git directories and a few helper shell functions.
+
+Before sourcing it, your script should set up a few variables;
+`USAGE` (and `LONG_USAGE`, if any) is used to define message
+given by `usage()` shell function.  `SUBDIRECTORY_OK` can be set
+if the script can run from a subdirectory of the working tree
+(some commands do not).
+
+The scriptlet sets `GIT_DIR` and `GIT_OBJECT_DIRECTORY` shell
+variables, but does *not* export them to the environment.
+
+FUNCTIONS
+---------
+
+die::
+	exit after emitting the supplied error message to the
+	standard error stream.
+
+usage::
+	die with the usage message.
+
+set_reflog_action::
+	set the message that will be recorded to describe the
+	end-user action in the reflog, when the script updates a
+	ref.
+
+is_bare_repository::
+	outputs `true` or `false` to the standard output stream
+	to indicate if the repository is a bare repository
+	(i.e. without an associated working tree).
+
+cd_to_toplevel::
+	runs chdir to the toplevel of the working tree.
+
+require_work_tree::
+	checks if the repository is a bare repository, and dies
+	if so.  Used by scripts that require working tree
+	(e.g. `checkout`).
 
-to make the rest of the git scripts more careful and readable.
 
 Author
 ------