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diff --git a/Documentation/git-sh-setup.txt b/Documentation/git-sh-setup.txt new file mode 100644 index 000000000000..8632612c31d0 --- /dev/null +++ b/Documentation/git-sh-setup.txt @@ -0,0 +1,95 @@ +git-sh-setup(1) +=============== + +NAME +---- +git-sh-setup - Common Git shell script setup code + +SYNOPSIS +-------- +[verse] +'. "$(git --exec-path)/git-sh-setup"' + +DESCRIPTION +----------- + +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. + +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 `GIT_REFLOG_ACTION` environment to a given string (typically + the name of the program) unless it is already set. Whenever + the script runs a `git` command that updates refs, a reflog + entry is created using the value of this string to leave the + record of what command updated the ref. + +git_editor:: + runs an editor of user's choice (GIT_EDITOR, core.editor, VISUAL or + EDITOR) on a given file, but error out if no editor is specified + and the terminal is dumb. + +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 current directory is within the working tree + of the repository, and otherwise dies. + +require_work_tree_exists:: + checks if the working tree associated with the repository + exists, and otherwise dies. Often done before calling + cd_to_toplevel, which is impossible to do if there is no + working tree. + +require_clean_work_tree <action> [<hint>]:: + checks that the working tree and index associated with the + repository have no uncommitted changes to tracked files. + Otherwise it emits an error message of the form `Cannot + <action>: <reason>. <hint>`, and dies. Example: ++ +---------------- +require_clean_work_tree rebase "Please commit or stash them." +---------------- + +get_author_ident_from_commit:: + outputs code for use with eval to set the GIT_AUTHOR_NAME, + GIT_AUTHOR_EMAIL and GIT_AUTHOR_DATE variables for a given commit. + +create_virtual_base:: + modifies the first file so only lines in common with the + second file remain. If there is insufficient common material, + then the first file is left empty. The result is suitable + as a virtual base input for a 3-way merge. + +GIT +--- +Part of the linkgit:git[1] suite |