mirror of
https://github.com/git/git
synced 2024-11-05 04:53:18 +00:00
35f6967161
Since some callers may want to send warning messages to somewhere other than stdout/stderr, stop printing "warning: Cannot merge binary files" from ll-merge and instead modify the return status of ll_merge() to indicate when a merge of binary files has occurred. Message printing probably does not belong in a "low-level merge" anyway. This commit continues printing the message as-is, just from the callers instead of within ll_merge(). Future changes will start handling the message differently in the merge-ort codepath. There was one special case here: the callers in rerere.c do NOT check for and print such a message; since those code paths explicitly skip over binary files, there is no reason to check for a return status of LL_MERGE_BINARY_CONFLICT or print the related message. Note that my methodology included first modifying ll_merge() to return a struct, so that the compiler would catch all the callers for me and ensure I had modified all of them. After modifying all of them, I then changed the struct to an enum. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
/*
|
||
* Low level 3-way in-core file merge.
|
||
*/
|
||
|
||
#ifndef LL_MERGE_H
|
||
#define LL_MERGE_H
|
||
|
||
#include "xdiff/xdiff.h"
|
||
|
||
/**
|
||
*
|
||
* Calling sequence:
|
||
* ----------------
|
||
*
|
||
* - Prepare a `struct ll_merge_options` to record options.
|
||
* If you have no special requests, skip this and pass `NULL`
|
||
* as the `opts` parameter to use the default options.
|
||
*
|
||
* - Allocate an mmbuffer_t variable for the result.
|
||
*
|
||
* - Allocate and fill variables with the file's original content
|
||
* and two modified versions (using `read_mmfile`, for example).
|
||
*
|
||
* - Call `ll_merge()`.
|
||
*
|
||
* - Read the merged content from `result_buf.ptr` and `result_buf.size`.
|
||
*
|
||
* - Release buffers when finished. A simple
|
||
* `free(ancestor.ptr); free(ours.ptr); free(theirs.ptr);
|
||
* free(result_buf.ptr);` will do.
|
||
*
|
||
* If the modifications do not merge cleanly, `ll_merge` will return a
|
||
* nonzero value and `result_buf` will generally include a description of
|
||
* the conflict bracketed by markers such as the traditional `<<<<<<<`
|
||
* and `>>>>>>>`.
|
||
*
|
||
* The `ancestor_label`, `our_label`, and `their_label` parameters are
|
||
* used to label the different sides of a conflict if the merge driver
|
||
* supports this.
|
||
*/
|
||
|
||
|
||
struct index_state;
|
||
|
||
/**
|
||
* This describes the set of options the calling program wants to affect
|
||
* the operation of a low-level (single file) merge.
|
||
*/
|
||
struct ll_merge_options {
|
||
|
||
/**
|
||
* Behave as though this were part of a merge between common ancestors in
|
||
* a recursive merge (merges of binary files may need to be handled
|
||
* differently in such cases, for example). If a helper program is
|
||
* specified by the `[merge "<driver>"] recursive` configuration, it will
|
||
* be used.
|
||
*/
|
||
unsigned virtual_ancestor : 1;
|
||
|
||
/**
|
||
* Resolve local conflicts automatically in favor of one side or the other
|
||
* (as in 'git merge-file' `--ours`/`--theirs`/`--union`). Can be `0`,
|
||
* `XDL_MERGE_FAVOR_OURS`, `XDL_MERGE_FAVOR_THEIRS`,
|
||
* or `XDL_MERGE_FAVOR_UNION`.
|
||
*/
|
||
unsigned variant : 2;
|
||
|
||
/**
|
||
* Resmudge and clean the "base", "theirs" and "ours" files before merging.
|
||
* Use this when the merge is likely to have overlapped with a change in
|
||
* smudge/clean or end-of-line normalization rules.
|
||
*/
|
||
unsigned renormalize : 1;
|
||
|
||
/**
|
||
* Increase the length of conflict markers so that nested conflicts
|
||
* can be differentiated.
|
||
*/
|
||
unsigned extra_marker_size;
|
||
|
||
/* Extra xpparam_t flags as defined in xdiff/xdiff.h. */
|
||
long xdl_opts;
|
||
};
|
||
|
||
enum ll_merge_result {
|
||
LL_MERGE_ERROR = -1,
|
||
LL_MERGE_OK = 0,
|
||
LL_MERGE_CONFLICT,
|
||
LL_MERGE_BINARY_CONFLICT,
|
||
};
|
||
|
||
/**
|
||
* Perform a three-way single-file merge in core. This is a thin wrapper
|
||
* around `xdl_merge` that takes the path and any merge backend specified in
|
||
* `.gitattributes` or `.git/info/attributes` into account.
|
||
* Returns 0 for a clean merge.
|
||
*/
|
||
enum ll_merge_result ll_merge(mmbuffer_t *result_buf,
|
||
const char *path,
|
||
mmfile_t *ancestor, const char *ancestor_label,
|
||
mmfile_t *ours, const char *our_label,
|
||
mmfile_t *theirs, const char *their_label,
|
||
struct index_state *istate,
|
||
const struct ll_merge_options *opts);
|
||
|
||
int ll_merge_marker_size(struct index_state *istate, const char *path);
|
||
void reset_merge_attributes(void);
|
||
|
||
#endif
|