mirror of
https://git.proxmox.com/git/libgit2
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60b9d3fcef
This adds support to diff and status for running filters (a la crlf) on blobs in the workdir before computing SHAs and before generating text diffs. This ended up being a bit more code change than I had thought since I had to reorganize some of the diff logic to minimize peak memory use when filtering blobs in a diff. This also adds a cap on the maximum size of data that will be loaded to diff. I set it at 512Mb which should match core git. Right now it is a #define in src/diff.h but it could be moved into the public API if desired.
268 lines
7.8 KiB
C
268 lines
7.8 KiB
C
/*
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* Copyright (C) 2009-2012 the libgit2 contributors
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*
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* This file is part of libgit2, distributed under the GNU GPL v2 with
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* a Linking Exception. For full terms see the included COPYING file.
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*/
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#ifndef INCLUDE_fileops_h__
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#define INCLUDE_fileops_h__
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#include "common.h"
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#include "map.h"
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#include "posix.h"
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#include "path.h"
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/**
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* Filebuffer methods
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*
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* Read whole files into an in-memory buffer for processing
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*/
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extern int git_futils_readbuffer(git_buf *obj, const char *path);
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extern int git_futils_readbuffer_updated(git_buf *obj, const char *path, time_t *mtime, int *updated);
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extern int git_futils_readbuffer_fd(git_buf *obj, git_file fd, size_t len);
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/**
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* File utils
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*
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* These are custom filesystem-related helper methods. They are
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* rather high level, and wrap the underlying POSIX methods
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*
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* All these methods return 0 on success,
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* or an error code on failure and an error message is set.
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*/
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/**
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* Create and open a file, while also
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* creating all the folders in its path
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*/
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extern int git_futils_creat_withpath(const char *path, const mode_t dirmode, const mode_t mode);
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/**
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* Create an open a process-locked file
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*/
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extern int git_futils_creat_locked(const char *path, const mode_t mode);
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/**
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* Create an open a process-locked file, while
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* also creating all the folders in its path
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*/
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extern int git_futils_creat_locked_withpath(const char *path, const mode_t dirmode, const mode_t mode);
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/**
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* Create a path recursively
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*
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* If a base parameter is being passed, it's expected to be valued with a
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* path pointing to an already existing directory.
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*/
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extern int git_futils_mkdir_r(const char *path, const char *base, const mode_t mode);
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/**
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* Flags to pass to `git_futils_mkdir`.
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*
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* * GIT_MKDIR_EXCL is "exclusive" - i.e. generate an error if dir exists.
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* * GIT_MKDIR_PATH says to make all components in the path.
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* * GIT_MKDIR_CHMOD says to chmod the final directory entry after creation
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* * GIT_MKDIR_CHMOD_PATH says to chmod each directory component in the path
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* * GIT_MKDIR_SKIP_LAST says to leave off the last element of the path
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*
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* Note that the chmod options will be executed even if the directory already
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* exists, unless GIT_MKDIR_EXCL is given.
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*/
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typedef enum {
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GIT_MKDIR_EXCL = 1,
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GIT_MKDIR_PATH = 2,
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GIT_MKDIR_CHMOD = 4,
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GIT_MKDIR_CHMOD_PATH = 8,
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GIT_MKDIR_SKIP_LAST = 16
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} git_futils_mkdir_flags;
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/**
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* Create a directory or entire path.
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*
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* This makes a directory (and the entire path leading up to it if requested),
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* and optionally chmods the directory immediately after (or each part of the
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* path if requested).
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*
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* @param path The path to create.
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* @param base Root for relative path. These directories will never be made.
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* @param mode The mode to use for created directories.
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* @param flags Combination of the mkdir flags above.
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* @return 0 on success, else error code
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*/
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extern int git_futils_mkdir(const char *path, const char *base, mode_t mode, uint32_t flags);
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/**
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* Create all the folders required to contain
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* the full path of a file
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*/
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extern int git_futils_mkpath2file(const char *path, const mode_t mode);
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typedef enum {
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GIT_DIRREMOVAL_EMPTY_HIERARCHY = 0,
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GIT_DIRREMOVAL_FILES_AND_DIRS = 1,
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GIT_DIRREMOVAL_ONLY_EMPTY_DIRS = 2,
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} git_directory_removal_type;
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/**
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* Remove path and any files and directories beneath it.
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*
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* @param path Path to to top level directory to process.
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*
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* @param removal_type GIT_DIRREMOVAL_EMPTY_HIERARCHY to remove a hierarchy
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* of empty directories (will fail if any file is found), GIT_DIRREMOVAL_FILES_AND_DIRS
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* to remove a hierarchy of files and folders, GIT_DIRREMOVAL_ONLY_EMPTY_DIRS to only remove
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* empty directories (no failure on file encounter).
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*
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* @return 0 on success; -1 on error.
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*/
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extern int git_futils_rmdir_r(const char *path, git_directory_removal_type removal_type);
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/**
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* Create and open a temporary file with a `_git2_` suffix.
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* Writes the filename into path_out.
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* @return On success, an open file descriptor, else an error code < 0.
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*/
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extern int git_futils_mktmp(git_buf *path_out, const char *filename);
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/**
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* Move a file on the filesystem, create the
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* destination path if it doesn't exist
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*/
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extern int git_futils_mv_withpath(const char *from, const char *to, const mode_t dirmode);
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/**
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* Copy a file
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*
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* The filemode will be used for the newly created file.
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*/
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extern int git_futils_cp(
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const char *from,
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const char *to,
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mode_t filemode);
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/**
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* Flags that can be passed to `git_futils_cp_r`.
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*/
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typedef enum {
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GIT_CPDIR_CREATE_EMPTY_DIRS = 1,
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GIT_CPDIR_COPY_SYMLINKS = 2,
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GIT_CPDIR_COPY_DOTFILES = 4,
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GIT_CPDIR_OVERWRITE = 8,
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GIT_CPDIR_CHMOD = 16
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} git_futils_cpdir_flags;
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/**
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* Copy a directory tree.
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*
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* This copies directories and files from one root to another. You can
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* pass a combinationof GIT_CPDIR flags as defined above.
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*
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* If you pass the CHMOD flag, then the dirmode will be applied to all
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* directories that are created during the copy, overiding the natural
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* permissions. If you do not pass the CHMOD flag, then the dirmode
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* will actually be copied from the source files and the `dirmode` arg
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* will be ignored.
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*/
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extern int git_futils_cp_r(
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const char *from,
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const char *to,
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uint32_t flags,
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mode_t dirmode);
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/**
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* Open a file readonly and set error if needed.
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*/
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extern int git_futils_open_ro(const char *path);
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/**
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* Get the filesize in bytes of a file
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*/
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extern git_off_t git_futils_filesize(git_file fd);
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#define GIT_MODE_PERMS_MASK 0777
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#define GIT_CANONICAL_PERMS(MODE) (((MODE) & 0100) ? 0755 : 0644)
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#define GIT_MODE_TYPE(MODE) ((MODE) & ~GIT_MODE_PERMS_MASK)
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/**
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* Convert a mode_t from the OS to a legal git mode_t value.
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*/
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extern mode_t git_futils_canonical_mode(mode_t raw_mode);
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/**
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* Read-only map all or part of a file into memory.
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* When possible this function should favor a virtual memory
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* style mapping over some form of malloc()+read(), as the
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* data access will be random and is not likely to touch the
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* majority of the region requested.
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*
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* @param out buffer to populate with the mapping information.
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* @param fd open descriptor to configure the mapping from.
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* @param begin first byte to map, this should be page aligned.
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* @param end number of bytes to map.
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* @return
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* - 0 on success;
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* - -1 on error.
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*/
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extern int git_futils_mmap_ro(
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git_map *out,
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git_file fd,
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git_off_t begin,
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size_t len);
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/**
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* Read-only map an entire file.
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*
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* @param out buffer to populate with the mapping information.
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* @param path path to file to be opened.
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* @return
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* - 0 on success;
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* - GIT_ENOTFOUND if not found;
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* - -1 on an unspecified OS related error.
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*/
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extern int git_futils_mmap_ro_file(
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git_map *out,
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const char *path);
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/**
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* Release the memory associated with a previous memory mapping.
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* @param map the mapping description previously configured.
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*/
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extern void git_futils_mmap_free(git_map *map);
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/**
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* Find a "global" file (i.e. one in a user's home directory).
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*
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* @param pathbuf buffer to write the full path into
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* @param filename name of file to find in the home directory
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* @return
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* - 0 if found;
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* - GIT_ENOTFOUND if not found;
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* - -1 on an unspecified OS related error.
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*/
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extern int git_futils_find_global_file(git_buf *path, const char *filename);
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/**
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* Find a "system" file (i.e. one shared for all users of the system).
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*
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* @param pathbuf buffer to write the full path into
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* @param filename name of file to find in the home directory
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* @return
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* - 0 if found;
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* - GIT_ENOTFOUND if not found;
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* - -1 on an unspecified OS related error.
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*/
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extern int git_futils_find_system_file(git_buf *path, const char *filename);
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/**
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* Create a "fake" symlink (text file containing the target path).
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*
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* @param new symlink file to be created
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* @param old original symlink target
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* @return 0 on success, -1 on error
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*/
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extern int git_futils_fake_symlink(const char *new, const char *old);
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#endif /* INCLUDE_fileops_h__ */
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