diff options
Diffstat (limited to 'include/git2/diff.h')
| -rw-r--r-- | include/git2/diff.h | 794 |
1 files changed, 340 insertions, 454 deletions
diff --git a/include/git2/diff.h b/include/git2/diff.h index 43029c49c..61d288380 100644 --- a/include/git2/diff.h +++ b/include/git2/diff.h @@ -20,34 +20,38 @@ * Overview * -------- * - * Calculating diffs is generally done in two phases: building a diff list - * then traversing the diff list. This makes is easier to share logic - * across the various types of diffs (tree vs tree, workdir vs index, etc.), - * and also allows you to insert optional diff list post-processing phases, - * such as rename detected, in between the steps. When you are done with a - * diff list object, it must be freed. + * Calculating diffs is generally done in two phases: building a list of + * diffs then traversing it. This makes is easier to share logic across + * the various types of diffs (tree vs tree, workdir vs index, etc.), and + * also allows you to insert optional diff post-processing phases, + * such as rename detection, in between the steps. When you are done with + * a diff object, it must be freed. * * Terminology * ----------- * * To understand the diff APIs, you should know the following terms: * - * - A `diff` or `diff list` represents the cumulative list of differences - * between two snapshots of a repository (possibly filtered by a set of - * file name patterns). This is the `git_diff_list` object. + * - A `diff` represents the cumulative list of differences between two + * snapshots of a repository (possibly filtered by a set of file name + * patterns). This is the `git_diff` object. + * * - A `delta` is a file pair with an old and new revision. The old version * may be absent if the file was just created and the new version may be * absent if the file was deleted. A diff is mostly just a list of deltas. + * * - A `binary` file / delta is a file (or pair) for which no text diffs - * should be generated. A diff list can contain delta entries that are + * should be generated. A diff can contain delta entries that are * binary, but no diff content will be output for those files. There is * a base heuristic for binary detection and you can further tune the * behavior with git attributes or diff flags and option settings. + * * - A `hunk` is a span of modified lines in a delta along with some stable * surrounding context. You can configure the amount of context and other * properties of how hunks are generated. Each hunk also comes with a * header that described where it starts and ends in both the old and new * versions in the delta. + * * - A `line` is a range of characters inside a hunk. It could be a context * line (i.e. in both old and new versions), an added line (i.e. only in * the new version), or a removed line (i.e. only in the old version). @@ -68,100 +72,125 @@ GIT_BEGIN_DECL typedef enum { /** Normal diff, the default */ GIT_DIFF_NORMAL = 0, - /** Reverse the sides of the diff */ - GIT_DIFF_REVERSE = (1 << 0), - /** Treat all files as text, disabling binary attributes & detection */ - GIT_DIFF_FORCE_TEXT = (1 << 1), - /** Ignore all whitespace */ - GIT_DIFF_IGNORE_WHITESPACE = (1 << 2), - /** Ignore changes in amount of whitespace */ - GIT_DIFF_IGNORE_WHITESPACE_CHANGE = (1 << 3), - /** Ignore whitespace at end of line */ - GIT_DIFF_IGNORE_WHITESPACE_EOL = (1 << 4), - /** Exclude submodules from the diff completely */ - GIT_DIFF_IGNORE_SUBMODULES = (1 << 5), - /** Use the "patience diff" algorithm (currently unimplemented) */ - GIT_DIFF_PATIENCE = (1 << 6), - /** Include ignored files in the diff list */ - GIT_DIFF_INCLUDE_IGNORED = (1 << 7), - /** Include untracked files in the diff list */ - GIT_DIFF_INCLUDE_UNTRACKED = (1 << 8), - /** Include unmodified files in the diff list */ - GIT_DIFF_INCLUDE_UNMODIFIED = (1 << 9), - /** Even with GIT_DIFF_INCLUDE_UNTRACKED, an entire untracked - * directory will be marked with only a single entry in the diff list - * (a la what core Git does in `git status`); this flag adds *all* - * files under untracked directories as UNTRACKED entries, too. + /* + * Options controlling which files will be in the diff */ - GIT_DIFF_RECURSE_UNTRACKED_DIRS = (1 << 10), - /** If the pathspec is set in the diff options, this flags means to - * apply it as an exact match instead of as an fnmatch pattern. - */ - GIT_DIFF_DISABLE_PATHSPEC_MATCH = (1 << 11), + /** Reverse the sides of the diff */ + GIT_DIFF_REVERSE = (1u << 0), - /** Use case insensitive filename comparisons */ - GIT_DIFF_DELTAS_ARE_ICASE = (1 << 12), + /** Include ignored files in the diff */ + GIT_DIFF_INCLUDE_IGNORED = (1u << 1), - /** When generating patch text, include the content of untracked - * files. This automatically turns on GIT_DIFF_INCLUDE_UNTRACKED but - * it does not turn on GIT_DIFF_RECURSE_UNTRACKED_DIRS. Add that - * flag if you want the content of every single UNTRACKED file. + /** Even with GIT_DIFF_INCLUDE_IGNORED, an entire ignored directory + * will be marked with only a single entry in the diff; this flag + * adds all files under the directory as IGNORED entries, too. */ - GIT_DIFF_INCLUDE_UNTRACKED_CONTENT = (1 << 13), + GIT_DIFF_RECURSE_IGNORED_DIRS = (1u << 2), - /** Disable updating of the `binary` flag in delta records. This is - * useful when iterating over a diff if you don't need hunk and data - * callbacks and want to avoid having to load file completely. + /** Include untracked files in the diff */ + GIT_DIFF_INCLUDE_UNTRACKED = (1u << 3), + + /** Even with GIT_DIFF_INCLUDE_UNTRACKED, an entire untracked + * directory will be marked with only a single entry in the diff + * (a la what core Git does in `git status`); this flag adds *all* + * files under untracked directories as UNTRACKED entries, too. */ - GIT_DIFF_SKIP_BINARY_CHECK = (1 << 14), + GIT_DIFF_RECURSE_UNTRACKED_DIRS = (1u << 4), + + /** Include unmodified files in the diff */ + GIT_DIFF_INCLUDE_UNMODIFIED = (1u << 5), /** Normally, a type change between files will be converted into a * DELETED record for the old and an ADDED record for the new; this * options enabled the generation of TYPECHANGE delta records. */ - GIT_DIFF_INCLUDE_TYPECHANGE = (1 << 15), + GIT_DIFF_INCLUDE_TYPECHANGE = (1u << 6), /** Even with GIT_DIFF_INCLUDE_TYPECHANGE, blob->tree changes still * generally show as a DELETED blob. This flag tries to correctly * label blob->tree transitions as TYPECHANGE records with new_file's * mode set to tree. Note: the tree SHA will not be available. */ - GIT_DIFF_INCLUDE_TYPECHANGE_TREES = (1 << 16), + GIT_DIFF_INCLUDE_TYPECHANGE_TREES = (1u << 7), /** Ignore file mode changes */ - GIT_DIFF_IGNORE_FILEMODE = (1 << 17), + GIT_DIFF_IGNORE_FILEMODE = (1u << 8), - /** Even with GIT_DIFF_INCLUDE_IGNORED, an entire ignored directory - * will be marked with only a single entry in the diff list; this flag - * adds all files under the directory as IGNORED entries, too. + /** Treat all submodules as unmodified */ + GIT_DIFF_IGNORE_SUBMODULES = (1u << 9), + + /** Use case insensitive filename comparisons */ + GIT_DIFF_IGNORE_CASE = (1u << 10), + + /** If the pathspec is set in the diff options, this flags means to + * apply it as an exact match instead of as an fnmatch pattern. */ - GIT_DIFF_RECURSE_IGNORED_DIRS = (1 << 18), - - /** Core Git scans inside untracked directories, labeling them IGNORED - * if they are empty or only contain ignored files; a directory is - * consider UNTRACKED only if it has an actual untracked file in it. - * This scan is extra work for a case you often don't care about. This - * flag makes libgit2 immediately label an untracked directory as - * UNTRACKED without looking inside it (which differs from core Git). - * Of course, ignore rules are still checked for the directory itself. + GIT_DIFF_DISABLE_PATHSPEC_MATCH = (1u << 12), + + /** Disable updating of the `binary` flag in delta records. This is + * useful when iterating over a diff if you don't need hunk and data + * callbacks and want to avoid having to load file completely. + */ + GIT_DIFF_SKIP_BINARY_CHECK = (1u << 13), + + /** When diff finds an untracked directory, to match the behavior of + * core Git, it scans the contents for IGNORED and UNTRACKED files. + * If *all* contents are IGNORED, then the directory is IGNORED; if + * any contents are not IGNORED, then the directory is UNTRACKED. + * This is extra work that may not matter in many cases. This flag + * turns off that scan and immediately labels an untracked directory + * as UNTRACKED (changing the behavior to not match core Git). + */ + GIT_DIFF_ENABLE_FAST_UNTRACKED_DIRS = (1u << 14), + + /* + * Options controlling how output will be generated */ - GIT_DIFF_FAST_UNTRACKED_DIRS = (1 << 19), + /** Treat all files as text, disabling binary attributes & detection */ + GIT_DIFF_FORCE_TEXT = (1u << 20), /** Treat all files as binary, disabling text diffs */ - GIT_DIFF_FORCE_BINARY = (1 << 20), + GIT_DIFF_FORCE_BINARY = (1u << 21), + + /** Ignore all whitespace */ + GIT_DIFF_IGNORE_WHITESPACE = (1u << 22), + /** Ignore changes in amount of whitespace */ + GIT_DIFF_IGNORE_WHITESPACE_CHANGE = (1u << 23), + /** Ignore whitespace at end of line */ + GIT_DIFF_IGNORE_WHITESPACE_EOL = (1u << 24), + + /** When generating patch text, include the content of untracked + * files. This automatically turns on GIT_DIFF_INCLUDE_UNTRACKED but + * it does not turn on GIT_DIFF_RECURSE_UNTRACKED_DIRS. Add that + * flag if you want the content of every single UNTRACKED file. + */ + GIT_DIFF_SHOW_UNTRACKED_CONTENT = (1u << 25), + + /** When generating output, include the names of unmodified files if + * they are included in the git_diff. Normally these are skipped in + * the formats that list files (e.g. name-only, name-status, raw). + * Even with this, these will not be included in patch format. + */ + GIT_DIFF_SHOW_UNMODIFIED = (1u << 26), + + /** Use the "patience diff" algorithm */ + GIT_DIFF_PATIENCE = (1u << 28), + /** Take extra time to find minimal diff */ + GIT_DIFF_MINIMAL = (1 << 29), + } git_diff_option_t; /** - * The diff list object that contains all individual file deltas. + * The diff object that contains all individual file deltas. * * This is an opaque structure which will be allocated by one of the diff * generator functions below (such as `git_diff_tree_to_tree`). You are * responsible for releasing the object memory when done, using the - * `git_diff_list_free()` function. + * `git_diff_free()` function. */ -typedef struct git_diff_list git_diff_list; +typedef struct git_diff git_diff; /** * Flags for the delta object and the file objects on each side. @@ -172,16 +201,16 @@ typedef struct git_diff_list git_diff_list; * considered reserved for internal or future use. */ typedef enum { - GIT_DIFF_FLAG_BINARY = (1 << 0), /** file(s) treated as binary data */ - GIT_DIFF_FLAG_NOT_BINARY = (1 << 1), /** file(s) treated as text data */ - GIT_DIFF_FLAG_VALID_OID = (1 << 2), /** `oid` value is known correct */ + GIT_DIFF_FLAG_BINARY = (1u << 0), /** file(s) treated as binary data */ + GIT_DIFF_FLAG_NOT_BINARY = (1u << 1), /** file(s) treated as text data */ + GIT_DIFF_FLAG_VALID_OID = (1u << 2), /** `oid` value is known correct */ } git_diff_flag_t; /** * What type of change is described by a git_diff_delta? * * `GIT_DELTA_RENAMED` and `GIT_DELTA_COPIED` will only show up if you run - * `git_diff_find_similar()` on the diff list object. + * `git_diff_find_similar()` on the diff object. * * `GIT_DELTA_TYPECHANGE` only shows up given `GIT_DIFF_INCLUDE_TYPECHANGE` * in the option flags (otherwise type changes will be split into ADDED / @@ -200,11 +229,11 @@ typedef enum { } git_delta_t; /** - * Description of one side of a diff entry. + * Description of one side of a delta. * - * Although this is called a "file", it may actually represent a file, a - * symbolic link, a submodule commit id, or even a tree (although that only - * if you are tracking type changes or ignored/untracked directories). + * Although this is called a "file", it could represent a file, a symbolic + * link, a submodule commit id, or even a tree (although that only if you + * are tracking type changes or ignored/untracked directories). * * The `oid` is the `git_oid` of the item. If the entry represents an * absent side of a diff (e.g. the `old_file` of a `GIT_DELTA_ADDED` delta), @@ -231,9 +260,8 @@ typedef struct { /** * Description of changes to one entry. * - * When iterating over a diff list object, this will be passed to most - * callback functions and you can use the contents to understand exactly - * what has changed. + * When iterating over a diff, this will be passed to most callbacks and + * you can use the contents to understand exactly what has changed. * * The `old_file` represents the "from" side of the diff and the `new_file` * represents to "to" side of the diff. What those means depend on the @@ -266,28 +294,29 @@ typedef struct { * the score (a la `printf("M%03d", 100 - delta->similarity)`). */ typedef struct { + git_delta_t status; + uint32_t flags; /**< git_diff_flag_t values */ + uint16_t similarity; /**< for RENAMED and COPIED, value 0-100 */ + uint16_t nfiles; /**< number of files in this delta */ git_diff_file old_file; git_diff_file new_file; - git_delta_t status; - uint32_t similarity; /**< for RENAMED and COPIED, value 0-100 */ - uint32_t flags; } git_diff_delta; /** * Diff notification callback function. * * The callback will be called for each file, just before the `git_delta_t` - * gets inserted into the diff list. + * gets inserted into the diff. * * When the callback: * - returns < 0, the diff process will be aborted. - * - returns > 0, the delta will not be inserted into the diff list, but the + * - returns > 0, the delta will not be inserted into the diff, but the * diff process continues. - * - returns 0, the delta is inserted into the diff list, and the diff process + * - returns 0, the delta is inserted into the diff, and the diff process * continues. */ typedef int (*git_diff_notify_cb)( - const git_diff_list *diff_so_far, + const git_diff *diff_so_far, const git_diff_delta *delta_to_add, const char *matched_pathspec, void *payload); @@ -314,28 +343,44 @@ typedef int (*git_diff_notify_cb)( * - `notify_cb` is an optional callback function, notifying the consumer of * which files are being examined as the diff is generated * - `notify_payload` is the payload data to pass to the `notify_cb` function + * - `ignore_submodules` overrides the submodule ignore setting for all + * submodules in the diff. */ typedef struct { unsigned int version; /**< version for the struct */ uint32_t flags; /**< defaults to GIT_DIFF_NORMAL */ - uint16_t context_lines; /**< defaults to 3 */ - uint16_t interhunk_lines; /**< defaults to 0 */ - const char *old_prefix; /**< defaults to "a" */ - const char *new_prefix; /**< defaults to "b" */ - git_strarray pathspec; /**< defaults to include all paths */ - git_off_t max_size; /**< defaults to 512MB */ + + /* options controlling which files are in the diff */ + + git_submodule_ignore_t ignore_submodules; /**< submodule ignore rule */ + git_strarray pathspec; /**< defaults to include all paths */ git_diff_notify_cb notify_cb; - void *notify_payload; + void *notify_payload; + + /* options controlling how to diff text is generated */ + + uint16_t context_lines; /**< defaults to 3 */ + uint16_t interhunk_lines; /**< defaults to 0 */ + uint16_t oid_abbrev; /**< default 'core.abbrev' or 7 if unset */ + git_off_t max_size; /**< defaults to 512MB */ + const char *old_prefix; /**< defaults to "a" */ + const char *new_prefix; /**< defaults to "b" */ } git_diff_options; +/* The current version of the diff options structure */ #define GIT_DIFF_OPTIONS_VERSION 1 -#define GIT_DIFF_OPTIONS_INIT {GIT_DIFF_OPTIONS_VERSION, GIT_DIFF_NORMAL, 3} + +/* Stack initializer for diff options. Alternatively use + * `git_diff_options_init` programmatic initialization. + */ +#define GIT_DIFF_OPTIONS_INIT \ + {GIT_DIFF_OPTIONS_VERSION, 0, GIT_SUBMODULE_IGNORE_DEFAULT, {NULL,0}, NULL, NULL, 3} /** * When iterating over a diff, callback that will be made per file. * * @param delta A pointer to the delta data for the file - * @param progress Goes from 0 to 1 over the diff list + * @param progress Goes from 0 to 1 over the diff * @param payload User-specified pointer from foreach function */ typedef int (*git_diff_file_cb)( @@ -346,34 +391,35 @@ typedef int (*git_diff_file_cb)( /** * Structure describing a hunk of a diff. */ -typedef struct { - int old_start; /** Starting line number in old_file */ - int old_lines; /** Number of lines in old_file */ - int new_start; /** Starting line number in new_file */ - int new_lines; /** Number of lines in new_file */ -} git_diff_range; +typedef struct git_diff_hunk git_diff_hunk; +struct git_diff_hunk { + int old_start; /** Starting line number in old_file */ + int old_lines; /** Number of lines in old_file */ + int new_start; /** Starting line number in new_file */ + int new_lines; /** Number of lines in new_file */ + size_t header_len; /** Number of bytes in header text */ + char header[128]; /** Header text, NUL-byte terminated */ +}; /** * When iterating over a diff, callback that will be made per hunk. */ typedef int (*git_diff_hunk_cb)( const git_diff_delta *delta, - const git_diff_range *range, - const char *header, - size_t header_len, + const git_diff_hunk *hunk, void *payload); /** * Line origin constants. * * These values describe where a line came from and will be passed to - * the git_diff_data_cb when iterating over a diff. There are some + * the git_diff_line_cb when iterating over a diff. There are some * special origin constants at the end that are used for the text * output callbacks to demarcate lines that are actually part of * the file or hunk headers. */ typedef enum { - /* These values will be sent to `git_diff_data_cb` along with the line */ + /* These values will be sent to `git_diff_line_cb` along with the line */ GIT_DIFF_LINE_CONTEXT = ' ', GIT_DIFF_LINE_ADDITION = '+', GIT_DIFF_LINE_DELETION = '-', @@ -382,16 +428,29 @@ typedef enum { GIT_DIFF_LINE_ADD_EOFNL = '>', /**< Old has no LF at end, new does */ GIT_DIFF_LINE_DEL_EOFNL = '<', /**< Old has LF at end, new does not */ - /* The following values will only be sent to a `git_diff_data_cb` when - * the content of a diff is being formatted (eg. through - * git_diff_print_patch() or git_diff_print_compact(), for instance). + /* The following values will only be sent to a `git_diff_line_cb` when + * the content of a diff is being formatted through `git_diff_print`. */ GIT_DIFF_LINE_FILE_HDR = 'F', GIT_DIFF_LINE_HUNK_HDR = 'H', - GIT_DIFF_LINE_BINARY = 'B' + GIT_DIFF_LINE_BINARY = 'B' /**< For "Binary files x and y differ" */ } git_diff_line_t; /** + * Structure describing a line (or data span) of a diff. + */ +typedef struct git_diff_line git_diff_line; +struct git_diff_line { + char origin; /** A git_diff_line_t value */ + int old_lineno; /** Line number in old file or -1 for added line */ + int new_lineno; /** Line number in new file or -1 for deleted line */ + int num_lines; /** Number of newline characters in content */ + size_t content_len; /** Number of bytes of data */ + git_off_t content_offset; /** Offset in the original file to the content */ + const char *content; /** Pointer to diff text, not NUL-byte terminated */ +}; + +/** * When iterating over a diff, callback that will be made per text diff * line. In this context, the provided range will be NULL. * @@ -399,46 +458,36 @@ typedef enum { * of text. This uses some extra GIT_DIFF_LINE_... constants for output * of lines of file and hunk headers. */ -typedef int (*git_diff_data_cb)( +typedef int (*git_diff_line_cb)( const git_diff_delta *delta, /** delta that contains this data */ - const git_diff_range *range, /** range of lines containing this data */ - char line_origin, /** git_diff_list_t value from above */ - const char *content, /** diff data - not NUL terminated */ - size_t content_len, /** number of bytes of diff data */ + const git_diff_hunk *hunk, /** hunk containing this data */ + const git_diff_line *line, /** line data */ void *payload); /** user reference data */ /** - * The diff patch is used to store all the text diffs for a delta. - * - * You can easily loop over the content of patches and get information about - * them. - */ -typedef struct git_diff_patch git_diff_patch; - -/** * Flags to control the behavior of diff rename/copy detection. */ typedef enum { /** look for renames? (`--find-renames`) */ - GIT_DIFF_FIND_RENAMES = (1 << 0), + GIT_DIFF_FIND_RENAMES = (1u << 0), /** consider old side of modified for renames? (`--break-rewrites=N`) */ - GIT_DIFF_FIND_RENAMES_FROM_REWRITES = (1 << 1), + GIT_DIFF_FIND_RENAMES_FROM_REWRITES = (1u << 1), /** look for copies? (a la `--find-copies`) */ - GIT_DIFF_FIND_COPIES = (1 << 2), + GIT_DIFF_FIND_COPIES = (1u << 2), /** consider unmodified as copy sources? (`--find-copies-harder`) */ - GIT_DIFF_FIND_COPIES_FROM_UNMODIFIED = (1 << 3), + GIT_DIFF_FIND_COPIES_FROM_UNMODIFIED = (1u << 3), /** mark large rewrites for split (`--break-rewrites=/M`) */ - GIT_DIFF_FIND_REWRITES = (1 << 4), + GIT_DIFF_FIND_REWRITES = (1u << 4), /** actually split large rewrites into delete/add pairs */ - GIT_DIFF_BREAK_REWRITES = (1 << 5), + GIT_DIFF_BREAK_REWRITES = (1u << 5), /** mark rewrites for split and break into delete/add pairs */ GIT_DIFF_FIND_AND_BREAK_REWRITES = (GIT_DIFF_FIND_REWRITES | GIT_DIFF_BREAK_REWRITES), /** find renames/copies for untracked items in working directory */ - GIT_DIFF_FIND_FOR_UNTRACKED = (1 << 6), + GIT_DIFF_FIND_FOR_UNTRACKED = (1u << 6), /** turn on all finding features */ GIT_DIFF_FIND_ALL = (0x0ff), @@ -446,11 +495,14 @@ typedef enum { /** measure similarity ignoring leading whitespace (default) */ GIT_DIFF_FIND_IGNORE_LEADING_WHITESPACE = 0, /** measure similarity ignoring all whitespace */ - GIT_DIFF_FIND_IGNORE_WHITESPACE = (1 << 12), + GIT_DIFF_FIND_IGNORE_WHITESPACE = (1u << 12), /** measure similarity including all data */ - GIT_DIFF_FIND_DONT_IGNORE_WHITESPACE = (1 << 13), + GIT_DIFF_FIND_DONT_IGNORE_WHITESPACE = (1u << 13), /** measure similarity only by comparing SHAs (fast and cheap) */ - GIT_DIFF_FIND_EXACT_MATCH_ONLY = (1 << 14), + GIT_DIFF_FIND_EXACT_MATCH_ONLY = (1u << 14), + + /** do not break rewrites unless they contribute to a rename */ + GIT_DIFF_BREAK_REWRITES_FOR_RENAMES_ONLY = (1u << 15), } git_diff_find_t; /** @@ -515,22 +567,22 @@ typedef struct { #define GIT_DIFF_FIND_OPTIONS_VERSION 1 #define GIT_DIFF_FIND_OPTIONS_INIT {GIT_DIFF_FIND_OPTIONS_VERSION} -/** @name Diff List Generator Functions +/** @name Diff Generator Functions * * These are the functions you would use to create (or destroy) a - * git_diff_list from various objects in a repository. + * git_diff from various objects in a repository. */ /**@{*/ /** - * Deallocate a diff list. + * Deallocate a diff. * - * @param diff The previously created diff list; cannot be used after free. + * @param diff The previously created diff; cannot be used after free. */ -GIT_EXTERN(void) git_diff_list_free(git_diff_list *diff); +GIT_EXTERN(void) git_diff_free(git_diff *diff); /** - * Create a diff list with the difference between two tree objects. + * Create a diff with the difference between two tree objects. * * This is equivalent to `git diff <old-tree> <new-tree>` * @@ -539,21 +591,21 @@ GIT_EXTERN(void) git_diff_list_free(git_diff_list *diff); * pass NULL to indicate an empty tree, although it is an error to pass * NULL for both the `old_tree` and `new_tree`. * - * @param diff Output pointer to a git_diff_list pointer to be allocated. + * @param diff Output pointer to a git_diff pointer to be allocated. * @param repo The repository containing the trees. * @param old_tree A git_tree object to diff from, or NULL for empty tree. * @param new_tree A git_tree object to diff to, or NULL for empty tree. * @param opts Structure with options to influence diff or NULL for defaults. */ GIT_EXTERN(int) git_diff_tree_to_tree( - git_diff_list **diff, + git_diff **diff, git_repository *repo, git_tree *old_tree, git_tree *new_tree, const git_diff_options *opts); /**< can be NULL for defaults */ /** - * Create a diff list between a tree and repository index. + * Create a diff between a tree and repository index. * * This is equivalent to `git diff --cached <treeish>` or if you pass * the HEAD tree, then like `git diff --cached`. @@ -561,21 +613,25 @@ GIT_EXTERN(int) git_diff_tree_to_tree( * The tree you pass will be used for the "old_file" side of the delta, and * the index will be used for the "new_file" side of the delta. * - * @param diff Output pointer to a git_diff_list pointer to be allocated. + * If you pass NULL for the index, then the existing index of the `repo` + * will be used. In this case, the index will be refreshed from disk + * (if it has changed) before the diff is generated. + * + * @param diff Output pointer to a git_diff pointer to be allocated. * @param repo The repository containing the tree and index. * @param old_tree A git_tree object to diff from, or NULL for empty tree. * @param index The index to diff with; repo index used if NULL. * @param opts Structure with options to influence diff or NULL for defaults. */ GIT_EXTERN(int) git_diff_tree_to_index( - git_diff_list **diff, + git_diff **diff, git_repository *repo, git_tree *old_tree, git_index *index, const git_diff_options *opts); /**< can be NULL for defaults */ /** - * Create a diff list between the repository index and the workdir directory. + * Create a diff between the repository index and the workdir directory. * * This matches the `git diff` command. See the note below on * `git_diff_tree_to_workdir` for a discussion of the difference between @@ -585,19 +641,23 @@ GIT_EXTERN(int) git_diff_tree_to_index( * The index will be used for the "old_file" side of the delta, and the * working directory will be used for the "new_file" side of the delta. * - * @param diff Output pointer to a git_diff_list pointer to be allocated. + * If you pass NULL for the index, then the existing index of the `repo` + * will be used. In this case, the index will be refreshed from disk + * (if it has changed) before the diff is generated. + * + * @param diff Output pointer to a git_diff pointer to be allocated. * @param repo The repository. * @param index The index to diff from; repo index used if NULL. * @param opts Structure with options to influence diff or NULL for defaults. */ GIT_EXTERN(int) git_diff_index_to_workdir( - git_diff_list **diff, + git_diff **diff, git_repository *repo, git_index *index, const git_diff_options *opts); /**< can be NULL for defaults */ /** - * Create a diff list between a tree and the working directory. + * Create a diff between a tree and the working directory. * * The tree you provide will be used for the "old_file" side of the delta, * and the working directory will be used for the "new_file" side. @@ -611,31 +671,51 @@ GIT_EXTERN(int) git_diff_index_to_workdir( * files in the index. It may come as a surprise, but there is no direct * equivalent in core git. * - * To emulate `git diff <treeish>`, call both `git_diff_tree_to_index` and - * `git_diff_index_to_workdir`, then call `git_diff_merge` on the results. - * That will yield a `git_diff_list` that matches the git output. + * To emulate `git diff <tree>`, use `git_diff_tree_to_workdir_with_index` + * (or `git_diff_tree_to_index` and `git_diff_index_to_workdir`, then call + * `git_diff_merge` on the results). That will yield a `git_diff` that + * matches the git output. * * If this seems confusing, take the case of a file with a staged deletion * where the file has then been put back into the working dir and modified. * The tree-to-workdir diff for that file is 'modified', but core git would * show status 'deleted' since there is a pending deletion in the index. * - * @param diff A pointer to a git_diff_list pointer that will be allocated. + * @param diff A pointer to a git_diff pointer that will be allocated. * @param repo The repository containing the tree. * @param old_tree A git_tree object to diff from, or NULL for empty tree. * @param opts Structure with options to influence diff or NULL for defaults. */ GIT_EXTERN(int) git_diff_tree_to_workdir( - git_diff_list **diff, + git_diff **diff, + git_repository *repo, + git_tree *old_tree, + const git_diff_options *opts); /**< can be NULL for defaults */ + +/** + * Create a diff between a tree and the working directory using index data + * to account for staged deletes, tracked files, etc. + * + * This emulates `git diff <tree>` by diffing the tree to the index and + * the index to the working directory and blending the results into a + * single diff that includes staged deleted, etc. + * + * @param diff A pointer to a git_diff pointer that will be allocated. + * @param repo The repository containing the tree. + * @param old_tree A git_tree object to diff from, or NULL for empty tree. + * @param opts Structure with options to influence diff or NULL for defaults. + */ +GIT_EXTERN(int) git_diff_tree_to_workdir_with_index( + git_diff **diff, git_repository *repo, git_tree *old_tree, const git_diff_options *opts); /**< can be NULL for defaults */ /** - * Merge one diff list into another. + * Merge one diff into another. * * This merges items from the "from" list into the "onto" list. The - * resulting diff list will have all items that appear in either list. + * resulting diff will have all items that appear in either list. * If an item appears in both lists, then it will be "merged" to appear * as if the old version was from the "onto" list and the new version * is from the "from" list (with the exception that if the item has a @@ -645,320 +725,176 @@ GIT_EXTERN(int) git_diff_tree_to_workdir( * @param from Diff to merge. */ GIT_EXTERN(int) git_diff_merge( - git_diff_list *onto, - const git_diff_list *from); + git_diff *onto, + const git_diff *from); /** - * Transform a diff list marking file renames, copies, etc. + * Transform a diff marking file renames, copies, etc. * - * This modifies a diff list in place, replacing old entries that look + * This modifies a diff in place, replacing old entries that look * like renames or copies with new entries reflecting those changes. * This also will, if requested, break modified files into add/remove * pairs if the amount of change is above a threshold. * - * @param diff Diff list to run detection algorithms on + * @param diff diff to run detection algorithms on * @param options Control how detection should be run, NULL for defaults * @return 0 on success, -1 on failure */ GIT_EXTERN(int) git_diff_find_similar( - git_diff_list *diff, - git_diff_find_options *options); - -/**@}*/ - - -/** @name Diff List Processor Functions - * - * These are the functions you apply to a diff list to process it - * or read it in some way. - */ -/**@{*/ + git_diff *diff, + const git_diff_find_options *options); /** - * Loop over all deltas in a diff list issuing callbacks. + * Initialize diff options structure * - * This will iterate through all of the files described in a diff. You - * should provide a file callback to learn about each file. + * In most cases, you can probably just use `GIT_DIFF_OPTIONS_INIT` to + * initialize the diff options structure, but in some cases that is not + * going to work. You can call this function instead. Note that you + * must pass both a pointer to the structure to be initialized and the + * `GIT_DIFF_OPTIONS_VERSION` value from the header you compiled with. * - * The "hunk" and "line" callbacks are optional, and the text diff of the - * files will only be calculated if they are not NULL. Of course, these - * callbacks will not be invoked for binary files on the diff list or for - * files whose only changed is a file mode change. - * - * Returning a non-zero value from any of the callbacks will terminate - * the iteration and cause this return `GIT_EUSER`. - * - * @param diff A git_diff_list generated by one of the above functions. - * @param file_cb Callback function to make per file in the diff. - * @param hunk_cb Optional callback to make per hunk of text diff. This - * callback is called to describe a range of lines in the - * diff. It will not be issued for binary files. - * @param line_cb Optional callback to make per line of diff text. This - * same callback will be made for context lines, added, and - * removed lines, and even for a deleted trailing newline. - * @param payload Reference pointer that will be passed to your callbacks. - * @return 0 on success, GIT_EUSER on non-zero callback, or error code + * @param options Pointer to git_diff_options memory to be initialized + * @param version Should be `GIT_DIFF_OPTIONS_VERSION` + * @return 0 on success, negative on failure (such as unsupported version) */ -GIT_EXTERN(int) git_diff_foreach( - git_diff_list *diff, - git_diff_file_cb file_cb, - git_diff_hunk_cb hunk_cb, - git_diff_data_cb line_cb, - void *payload); +GIT_EXTERN(int) git_diff_options_init( + git_diff_options *options, + unsigned int version); -/** - * Iterate over a diff generating text output like "git diff --name-status". - * - * Returning a non-zero value from the callbacks will terminate the - * iteration and cause this return `GIT_EUSER`. - * - * @param diff A git_diff_list generated by one of the above functions. - * @param print_cb Callback to make per line of diff text. - * @param payload Reference pointer that will be passed to your callback. - * @return 0 on success, GIT_EUSER on non-zero callback, or error code - */ -GIT_EXTERN(int) git_diff_print_compact( - git_diff_list *diff, - git_diff_data_cb print_cb, - void *payload); +/**@}*/ -/** - * Iterate over a diff generating text output like "git diff --raw". - * - * Returning a non-zero value from the callbacks will terminate the - * iteration and cause this return `GIT_EUSER`. - * - * @param diff A git_diff_list generated by one of the above functions. - * @param print_cb Callback to make per line of diff text. - * @param payload Reference pointer that will be passed to your callback. - * @return 0 on success, GIT_EUSER on non-zero callback, or error code - */ -GIT_EXTERN(int) git_diff_print_raw( - git_diff_list *diff, - git_diff_data_cb print_cb, - void *payload); -/** - * Look up the single character abbreviation for a delta status code. - * - * When you call `git_diff_print_compact` it prints single letter codes into - * the output such as 'A' for added, 'D' for deleted, 'M' for modified, etc. - * It is sometimes convenient to convert a git_delta_t value into these - * letters for your own purposes. This function does just that. By the - * way, unmodified will return a space (i.e. ' '). +/** @name Diff Processor Functions * - * @param status The git_delta_t value to look up - * @return The single character label for that code - */ -GIT_EXTERN(char) git_diff_status_char(git_delta_t status); - -/** - * Iterate over a diff generating text output like "git diff". - * - * This is a super easy way to generate a patch from a diff. - * - * Returning a non-zero value from the callbacks will terminate the - * iteration and cause this return `GIT_EUSER`. - * - * @param diff A git_diff_list generated by one of the above functions. - * @param payload Reference pointer that will be passed to your callbacks. - * @param print_cb Callback function to output lines of the diff. This - * same function will be called for file headers, hunk - * headers, and diff lines. Fortunately, you can probably - * use various GIT_DIFF_LINE constants to determine what - * text you are given. - * @return 0 on success, GIT_EUSER on non-zero callback, or error code + * These are the functions you apply to a diff to process it + * or read it in some way. */ -GIT_EXTERN(int) git_diff_print_patch( - git_diff_list *diff, - git_diff_data_cb print_cb, - void *payload); +/**@{*/ /** - * Query how many diff records are there in a diff list. + * Query how many diff records are there in a diff. * - * @param diff A git_diff_list generated by one of the above functions + * @param diff A git_diff generated by one of the above functions * @return Count of number of deltas in the list */ -GIT_EXTERN(size_t) git_diff_num_deltas(git_diff_list *diff); +GIT_EXTERN(size_t) git_diff_num_deltas(const git_diff *diff); /** - * Query how many diff deltas are there in a diff list filtered by type. + * Query how many diff deltas are there in a diff filtered by type. * * This works just like `git_diff_entrycount()` with an extra parameter * that is a `git_delta_t` and returns just the count of how many deltas * match that particular type. * - * @param diff A git_diff_list generated by one of the above functions + * @param diff A git_diff generated by one of the above functions * @param type A git_delta_t value to filter the count * @return Count of number of deltas matching delta_t type */ GIT_EXTERN(size_t) git_diff_num_deltas_of_type( - git_diff_list *diff, - git_delta_t type); + const git_diff *diff, git_delta_t type); /** - * Return the diff delta and patch for an entry in the diff list. - * - * The `git_diff_patch` is a newly created object contains the text diffs - * for the delta. You have to call `git_diff_patch_free()` when you are - * done with it. You can use the patch object to loop over all the hunks - * and lines in the diff of the one delta. + * Return the diff delta for an entry in the diff list. * - * For an unchanged file or a binary file, no `git_diff_patch` will be - * created, the output will be set to NULL, and the `binary` flag will be - * set true in the `git_diff_delta` structure. - * - * The `git_diff_delta` pointer points to internal data and you do not have + * The `git_delta` pointer points to internal data and you do not have * to release it when you are done with it. It will go away when the - * `git_diff_list` and `git_diff_patch` go away. + * `git_diff` (or any associated `git_patch`) goes away. * - * It is okay to pass NULL for either of the output parameters; if you pass - * NULL for the `git_diff_patch`, then the text diff will not be calculated. + * Note that the flags on the delta related to whether it has binary + * content or not may not be set if there are no attributes set for the + * file and there has been no reason to load the file data at this point. + * For now, if you need those flags to be up to date, your only option is + * to either use `git_diff_foreach` or create a `git_patch`. * - * @param patch_out Output parameter for the delta patch object - * @param delta_out Output parameter for the delta object * @param diff Diff list object * @param idx Index into diff list - * @return 0 on success, other value < 0 on error + * @return Pointer to git_diff_delta (or NULL if `idx` out of range) */ -GIT_EXTERN(int) git_diff_get_patch( - git_diff_patch **patch_out, - const git_diff_delta **delta_out, - git_diff_list *diff, - size_t idx); +GIT_EXTERN(const git_diff_delta *) git_diff_get_delta( + const git_diff *diff, size_t idx); /** - * Free a git_diff_patch object. - */ -GIT_EXTERN(void) git_diff_patch_free( - git_diff_patch *patch); - -/** - * Get the delta associated with a patch - */ -GIT_EXTERN(const git_diff_delta *) git_diff_patch_delta( - git_diff_patch *patch); - -/** - * Get the number of hunks in a patch + * Check if deltas are sorted case sensitively or insensitively. + * + * @param diff diff to check + * @return 0 if case sensitive, 1 if case is ignored */ -GIT_EXTERN(size_t) git_diff_patch_num_hunks( - git_diff_patch *patch); +GIT_EXTERN(int) git_diff_is_sorted_icase(const git_diff *diff); /** - * Get line counts of each type in a patch. + * Loop over all deltas in a diff issuing callbacks. * - * This helps imitate a diff --numstat type of output. For that purpose, - * you only need the `total_additions` and `total_deletions` values, but we - * include the `total_context` line count in case you want the total number - * of lines of diff output that will be generated. + * This will iterate through all of the files described in a diff. You + * should provide a file callback to learn about each file. * - * All outputs are optional. Pass NULL if you don't need a particular count. + * The "hunk" and "line" callbacks are optional, and the text diff of the + * files will only be calculated if they are not NULL. Of course, these + * callbacks will not be invoked for binary files on the diff or for + * files whose only changed is a file mode change. * - * @param total_context Count of context lines in output, can be NULL. - * @param total_additions Count of addition lines in output, can be NULL. - * @param total_deletions Count of deletion lines in output, can be NULL. - * @param patch The git_diff_patch object - * @return 0 on success, <0 on error - */ -GIT_EXTERN(int) git_diff_patch_line_stats( - size_t *total_context, - size_t *total_additions, - size_t *total_deletions, - const git_diff_patch *patch); - -/** - * Get the information about a hunk in a patch - * - * Given a patch and a hunk index into the patch, this returns detailed - * information about that hunk. Any of the output pointers can be passed - * as NULL if you don't care about that particular piece of information. - * - * @param range Output pointer to git_diff_range of hunk - * @param header Output pointer to header string for hunk. Unlike the - * content pointer for each line, this will be NUL-terminated - * @param header_len Output value of characters in header string - * @param lines_in_hunk Output count of total lines in this hunk - * @param patch Input pointer to patch object - * @param hunk_idx Input index of hunk to get information about - * @return 0 on success, GIT_ENOTFOUND if hunk_idx out of range, <0 on error + * Returning a non-zero value from any of the callbacks will terminate + * the iteration and cause this return `GIT_EUSER`. + * + * @param diff A git_diff generated by one of the above functions. + * @param file_cb Callback function to make per file in the diff. + * @param hunk_cb Optional callback to make per hunk of text diff. This + * callback is called to describe a range of lines in the + * diff. It will not be issued for binary files. + * @param line_cb Optional callback to make per line of diff text. This + * same callback will be made for context lines, added, and + * removed lines, and even for a deleted trailing newline. + * @param payload Reference pointer that will be passed to your callbacks. + * @return 0 on success, GIT_EUSER on non-zero callback, or error code */ -GIT_EXTERN(int) git_diff_patch_get_hunk( - const git_diff_range **range, - const char **header, - size_t *header_len, - size_t *lines_in_hunk, - git_diff_patch *patch, - size_t hunk_idx); +GIT_EXTERN(int) git_diff_foreach( + git_diff *diff, + git_diff_file_cb file_cb, + git_diff_hunk_cb hunk_cb, + git_diff_line_cb line_cb, + void *payload); /** - * Get the number of lines in a hunk. + * Look up the single character abbreviation for a delta status code. + * + * When you run `git diff --name-status` it uses single letter codes in + * the output such as 'A' for added, 'D' for deleted, 'M' for modified, + * etc. This function converts a git_delta_t value into these letters for + * your own purposes. GIT_DELTA_UNTRACKED will return a space (i.e. ' '). * - * @param patch The git_diff_patch object - * @param hunk_idx Index of the hunk - * @return Number of lines in hunk or -1 if invalid hunk index + * @param status The git_delta_t value to look up + * @return The single character label for that code */ -GIT_EXTERN(int) git_diff_patch_num_lines_in_hunk( - git_diff_patch *patch, - size_t hunk_idx); +GIT_EXTERN(char) git_diff_status_char(git_delta_t status); /** - * Get data about a line in a hunk of a patch. - * - * Given a patch, a hunk index, and a line index in the hunk, this - * will return a lot of details about that line. If you pass a hunk - * index larger than the number of hunks or a line index larger than - * the number of lines in the hunk, this will return -1. - * - * @param line_origin A GIT_DIFF_LINE constant from above - * @param content Pointer to content of diff line, not NUL-terminated - * @param content_len Number of characters in content - * @param old_lineno Line number in old file or -1 if line is added - * @param new_lineno Line number in new file or -1 if line is deleted - * @param patch The patch to look in - * @param hunk_idx The index of the hunk - * @param line_of_hunk The index of the line in the hunk - * @return 0 on success, <0 on failure + * Possible output formats for diff data */ -GIT_EXTERN(int) git_diff_patch_get_line_in_hunk( - char *line_origin, - const char **content, - size_t *content_len, - int *old_lineno, - int *new_lineno, - git_diff_patch *patch, - size_t hunk_idx, - size_t line_of_hunk); +typedef enum { + GIT_DIFF_FORMAT_PATCH = 1u, /**< full git diff */ + GIT_DIFF_FORMAT_PATCH_HEADER = 2u, /**< just the file headers of patch */ + GIT_DIFF_FORMAT_RAW = 3u, /**< like git diff --raw */ + GIT_DIFF_FORMAT_NAME_ONLY = 4u, /**< like git diff --name-only */ + GIT_DIFF_FORMAT_NAME_STATUS = 5u, /**< like git diff --name-status */ +} git_diff_format_t; /** - * Serialize the patch to text via callback. + * Iterate over a diff generating formatted text output. * - * Returning a non-zero value from the callback will terminate the iteration - * and cause this return `GIT_EUSER`. + * Returning a non-zero value from the callbacks will terminate the + * iteration and cause this return `GIT_EUSER`. * - * @param patch A git_diff_patch representing changes to one file - * @param print_cb Callback function to output lines of the patch. Will be - * called for file headers, hunk headers, and diff lines. - * @param payload Reference pointer that will be passed to your callbacks. + * @param diff A git_diff generated by one of the above functions. + * @param format A git_diff_format_t value to pick the text format. + * @param print_cb Callback to make per line of diff text. + * @param payload Reference pointer that will be passed to your callback. * @return 0 on success, GIT_EUSER on non-zero callback, or error code */ -GIT_EXTERN(int) git_diff_patch_print( - git_diff_patch *patch, - git_diff_data_cb print_cb, +GIT_EXTERN(int) git_diff_print( + git_diff *diff, + git_diff_format_t format, + git_diff_line_cb print_cb, void *payload); -/** - * Get the content of a patch as a single diff text. - * - * @param string Allocated string; caller must free. - * @param patch A git_diff_patch representing changes to one file - * @return 0 on success, <0 on failure. - */ -GIT_EXTERN(int) git_diff_patch_to_str( - char **string, - git_diff_patch *patch); - /**@}*/ @@ -1001,34 +937,10 @@ GIT_EXTERN(int) git_diff_blobs( const git_diff_options *options, git_diff_file_cb file_cb, git_diff_hunk_cb hunk_cb, - git_diff_data_cb line_cb, + git_diff_line_cb line_cb, void *payload); /** - * Directly generate a patch from the difference between two blobs. - * - * This is just like `git_diff_blobs()` except it generates a patch object - * for the difference instead of directly making callbacks. You can use the - * standard `git_diff_patch` accessor functions to read the patch data, and - * you must call `git_diff_patch_free()` on the patch when done. - * - * @param out The generated patch; NULL on error - * @param old_blob Blob for old side of diff, or NULL for empty blob - * @param old_as_path Treat old blob as if it had this filename; can be NULL - * @param new_blob Blob for new side of diff, or NULL for empty blob - * @param new_as_path Treat new blob as if it had this filename; can be NULL - * @param opts Options for diff, or NULL for default options - * @return 0 on success or error code < 0 - */ -GIT_EXTERN(int) git_diff_patch_from_blobs( - git_diff_patch **out, - const git_blob *old_blob, - const char *old_as_path, - const git_blob *new_blob, - const char *new_as_path, - const git_diff_options *opts); - -/** * Directly run a diff between a blob and a buffer. * * As with `git_diff_blobs`, comparing a blob and buffer lacks some context, @@ -1048,7 +960,7 @@ GIT_EXTERN(int) git_diff_patch_from_blobs( * @param options Options for diff, or NULL for default options * @param file_cb Callback for "file"; made once if there is a diff; can be NULL * @param hunk_cb Callback for each hunk in diff; can be NULL - * @param data_cb Callback for each line in diff; can be NULL + * @param line_cb Callback for each line in diff; can be NULL * @param payload Payload passed to each callback function * @return 0 on success, GIT_EUSER on non-zero callback return, or error code */ @@ -1061,35 +973,9 @@ GIT_EXTERN(int) git_diff_blob_to_buffer( const git_diff_options *options, git_diff_file_cb file_cb, git_diff_hunk_cb hunk_cb, - git_diff_data_cb data_cb, + git_diff_line_cb line_cb, void *payload); -/** - * Directly generate a patch from the difference between a blob and a buffer. - * - * This is just like `git_diff_blob_to_buffer()` except it generates a patch - * object for the difference instead of directly making callbacks. You can - * use the standard `git_diff_patch` accessor functions to read the patch - * data, and you must call `git_diff_patch_free()` on the patch when done. - * - * @param out The generated patch; NULL on error - * @param old_blob Blob for old side of diff, or NULL for empty blob - * @param old_as_path Treat old blob as if it had this filename; can be NULL - * @param buffer Raw data for new side of diff, or NULL for empty - * @param buffer_len Length of raw data for new side of diff - * @param buffer_as_path Treat buffer as if it had this filename; can be NULL - * @param opts Options for diff, or NULL for default options - * @return 0 on success or error code < 0 - */ -GIT_EXTERN(int) git_diff_patch_from_blob_and_buffer( - git_diff_patch **out, - const git_blob *old_blob, - const char *old_as_path, - const char *buffer, - size_t buffer_len, - const char *buffer_as_path, - const git_diff_options *opts); - GIT_END_DECL |