【整理】git add的用法/语法/帮助文件

通过

git help add

可以查看到git add的语法:

GIT-ADD(1)                                                              Git Manual                                                              GIT-ADD(1)

NAME
       git-add - Add file contents to the index

SYNOPSIS
       git add [-n] [-v] [--force | -f] [--interactive | -i] [--patch | -p]
                 [--edit | -e] [--all | [--update | -u]] [--intent-to-add | -N]
                 [--refresh] [--ignore-errors] [--ignore-missing] [--]
                 [<filepattern>...]

DESCRIPTION
       This command updates the index using the current content found in the working tree, to prepare the content staged for the next commit. It typically
       adds the current content of existing paths as a whole, but with some options it can also be used to add content with only part of the changes made
       to the working tree files applied, or remove paths that do not exist in the working tree anymore.

       The "index" holds a snapshot of the content of the working tree, and it is this snapshot that is taken as the contents of the next commit. Thus
       after making any changes to the working directory, and before running the commit command, you must use the add command to add any new or modified
       files to the index.

       This command can be performed multiple times before a commit. It only adds the content of the specified file(s) at the time the add command is run;
       if you want subsequent changes included in the next commit, then you must run git add again to add the new content to the index.

       The git status command can be used to obtain a summary of which files have changes that are staged for the next commit.

       The git add command will not add ignored files by default. If any ignored files were explicitly specified on the command line, git add will fail
       with a list of ignored files. Ignored files reached by directory recursion or filename globbing performed by Git (quote your globs before the
       shell) will be silently ignored. The git add command can be used to add ignored files with the -f (force) option.

       Please see git-commit(1) for alternative ways to add content to a commit.

OPTIONS
       <filepattern>...
           Files to add content from. Fileglobs (e.g.  *.c) can be given to add all matching files. Also a leading directory name (e.g.  dir to add
           dir/file1 and dir/file2) can be given to add all files in the directory, recursively.

       -n, --dry-run
           Don’t actually add the file(s), just show if they exist and/or will be ignored.

       -v, --verbose
           Be verbose.

       -f, --force
           Allow adding otherwise ignored files.

       -i, --interactive
           Add modified contents in the working tree interactively to the index. Optional path arguments may be supplied to limit operation to a subset of

       -p, --patch
           Interactively choose hunks of patch between the index and the work tree and add them to the index. This gives the user a chance to review the
           difference before adding modified contents to the index.

           This effectively runs add --interactive, but bypasses the initial command menu and directly jumps to the patch subcommand. See “Interactive
           mode” for details.

       -e, --edit
           Open the diff vs. the index in an editor and let the user edit it. After the editor was closed, adjust the hunk headers and apply the patch to
           the index.

           The intent of this option is to pick and choose lines of the patch to apply, or even to modify the contents of lines to be staged. This can be
           quicker and more flexible than using the interactive hunk selector. However, it is easy to confuse oneself and create a patch that does not
           apply to the index. See EDITING PATCHES below.

       -u, --update
           Only match <filepattern> against already tracked files in the index rather than the working tree. That means that it will never stage new
           files, but that it will stage modified new contents of tracked files and that it will remove files from the index if the corresponding files in
           the working tree have been removed.

           If no <filepattern> is given, default to "."; in other words, update all tracked files in the current directory and its subdirectories.

       -A, --all
           Like -u, but match <filepattern> against files in the working tree in addition to the index. That means that it will find new files as well as
           staging modified content and removing files that are no longer in the working tree.

       -N, --intent-to-add
           Record only the fact that the path will be added later. An entry for the path is placed in the index with no content. This is useful for, among
           other things, showing the unstaged content of such files with git diff and committing them with git commit -a.

       --refresh
           Don’t add the file(s), but only refresh their stat() information in the index.

       --ignore-errors
           If some files could not be added because of errors indexing them, do not abort the operation, but continue adding the others. The command shall
           still exit with non-zero status. The configuration variable add.ignoreErrors can be set to true to make this the default behaviour.

       --ignore-missing
           This option can only be used together with --dry-run. By using this option the user can check if any of the given files would be ignored, no
           matter if they are already present in the work tree or not.

       --
           This option can be used to separate command-line options from the list of files, (useful when filenames might be mistaken for command-line
           options).

CONFIGURATION
       The optional configuration variable core.excludesfile indicates a path to a file containing patterns of file names to exclude from git-add, similar
       to $GIT_DIR/info/exclude. Patterns in the exclude file are used in addition to those in info/exclude. See gitrepository-layout(5).

EXAMPLES
       ·   Adds content from all *.txt files under Documentation directory and its subdirectories:

               $ git add Documentation/\*.txt

           Note that the asterisk * is quoted from the shell in this example; this lets the command include the files from subdirectories of
           Documentation/ directory.

       ·   Considers adding content from all git-*.sh scripts:

               $ git add git-*.sh

           Because this example lets the shell expand the asterisk (i.e. you are listing the files explicitly), it does not consider subdir/git-foo.sh.

INTERACTIVE MODE
       When the command enters the interactive mode, it shows the output of the status subcommand, and then goes into its interactive command loop.

       The command loop shows the list of subcommands available, and gives a prompt "What now> ". In general, when the prompt ends with a single >, you
       can pick only one of the choices given and type return, like this:

               *** Commands ***
                 1: status       2: update       3: revert       4: add untracked
                 5: patch        6: diff         7: quit         8: help
               What now> 1

       You also could say s or sta or status above as long as the choice is unique.

       The main command loop has 6 subcommands (plus help and quit).

       status
           This shows the change between HEAD and index (i.e. what will be committed if you say git commit), and between index and working tree files
           (i.e. what you could stage further before git commit using git add) for each path. A sample output looks like this:

                             staged     unstaged path
                    1:       binary      nothing foo.png
                    2:     +403/-35        +1/-1 git-add--interactive.perl

           It shows that foo.png has differences from HEAD (but that is binary so line count cannot be shown) and there is no difference between indexed
           copy and the working tree version (if the working tree version were also different, binary would have been shown in place of nothing). The
           other file, git-add--interactive.perl, has 403 lines added and 35 lines deleted if you commit what is in the index, but working tree file has
           further modifications (one addition and one deletion).

       update
           This shows the status information and issues an "Update>>" prompt. When the prompt ends with double >>, you can make more than one selection,
           concatenated with whitespace or comma. Also you can say ranges. E.g. "2-5 7,9" to choose 2,3,4,5,7,9 from the list. If the second number in a
           range is omitted, all remaining patches are taken. E.g. "7-" to choose 7,8,9 from the list. You can say * to choose everything.

           What you chose are then highlighted with *, like this:

                          staged     unstaged path
                 1:       binary      nothing foo.png
               * 2:     +403/-35        +1/-1 git-add--interactive.perl

           To remove selection, prefix the input with - like this:

               Update>> -2

           After making the selection, answer with an empty line to stage the contents of working tree files for selected paths in the index.

       revert
           This has a very similar UI to update, and the staged information for selected paths are reverted to that of the HEAD version. Reverting new
           paths makes them untracked.

       add untracked
           This has a very similar UI to update and revert, and lets you add untracked paths to the index.

       patch
           This lets you choose one path out of a status like selection. After choosing the path, it presents the diff between the index and the working
           tree file and asks you if you want to stage the change of each hunk. You can select one of the following options and type return:

               y - stage this hunk
               n - do not stage this hunk
               q - quit; do not stage this hunk nor any of the remaining ones
               a - stage this hunk and all later hunks in the file
               d - do not stage this hunk nor any of the later hunks in the file
               g - select a hunk to go to
               / - search for a hunk matching the given regex
               j - leave this hunk undecided, see next undecided hunk
               J - leave this hunk undecided, see next hunk
               k - leave this hunk undecided, see previous undecided hunk
               K - leave this hunk undecided, see previous hunk
               s - split the current hunk into smaller hunks
               e - manually edit the current hunk
               ? - print help

           After deciding the fate for all hunks, if there is any hunk that was chosen, the index is updated with the selected hunks.

           You can omit having to type return here, by setting the configuration variable interactive.singlekey to true.

       diff
           This lets you review what will be committed (i.e. between HEAD and index).

EDITING PATCHES
       Invoking git add -e or selecting e from the interactive hunk selector will open a patch in your editor; after the editor exits, the result is
       applied to the index. You are free to make arbitrary changes to the patch, but note that some changes may have confusing results, or even result in
       a patch that cannot be applied. If you want to abort the operation entirely (i.e., stage nothing new in the index), simply delete all lines of the
       patch. The list below describes some common things you may see in a patch, and which editing operations make sense on them.

       added content
           Added content is represented by lines beginning with "+". You can prevent staging any addition lines by deleting them.

       removed content
           Removed content is represented by lines beginning with "-". You can prevent staging their removal by converting the "-" to a " " (space).

       modified content
           Modified content is represented by "-" lines (removing the old content) followed by "+" lines (adding the replacement content). You can prevent
           staging the modification by converting "-" lines to " ", and removing "+" lines. Beware that modifying only half of the pair is likely to
           introduce confusing changes to the index.

       There are also more complex operations that can be performed. But beware that because the patch is applied only to the index and not the working
       tree, the working tree will appear to "undo" the change in the index. For example, introducing a new line into the index that is in neither the
       HEAD nor the working tree will stage the new line for commit, but the line will appear to be reverted in the working tree.

       Avoid using these constructs, or do so with extreme caution.

       removing untouched content
           Content which does not differ between the index and working tree may be shown on context lines, beginning with a " " (space). You can stage
           context lines for removal by converting the space to a "-". The resulting working tree file will appear to re-add the content.

       modifying existing content
           One can also modify context lines by staging them for removal (by converting " " to "-") and adding a "+" line with the new content. Similarly,
           one can modify "+" lines for existing additions or modifications. In all cases, the new modification will appear reverted in the working tree.

       new content
           You may also add new content that does not exist in the patch; simply add new lines, each starting with "+". The addition will appear reverted
           in the working tree.

       There are also several operations which should be avoided entirely, as they will make the patch impossible to apply:

       ·   adding context (" ") or removal ("-") lines

       ·   deleting context or removal lines

       ·   modifying the contents of context or removal lines

SEE ALSO
       git-status(1) git-rm(1) git-reset(1) git-mv(1) git-commit(1) git-update-index(1)

GIT
       Part of the git(1) suite

Git 1.7.9                                                               02/13/2012                                                              GIT-ADD(1)
(END)

 

【总结】

git add .

的含义是:

其符合:

git add [<filepattern>]

的语法

而.表示当前文件夹,所以是:

添加当前文件夹内所有的文件,并且是递归式地添加(包括其子文件内的文件)



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