mirror of
https://github.com/git/git
synced 2024-08-28 20:20:07 +00:00
![Nguyễn Thái Ngọc Duy](/assets/img/avatar_default.png)
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1257 lines
31 KiB
C
1257 lines
31 KiB
C
#include "git-compat-util.h"
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#include "line-range.h"
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#include "cache.h"
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#include "tag.h"
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#include "blob.h"
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#include "tree.h"
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#include "diff.h"
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#include "commit.h"
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#include "decorate.h"
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#include "revision.h"
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#include "xdiff-interface.h"
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#include "strbuf.h"
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#include "log-tree.h"
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#include "graph.h"
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#include "userdiff.h"
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#include "line-log.h"
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#include "argv-array.h"
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static void range_set_grow(struct range_set *rs, size_t extra)
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{
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ALLOC_GROW(rs->ranges, rs->nr + extra, rs->alloc);
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}
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/* Either initialization would be fine */
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#define RANGE_SET_INIT {0}
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void range_set_init(struct range_set *rs, size_t prealloc)
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{
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rs->alloc = rs->nr = 0;
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rs->ranges = NULL;
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if (prealloc)
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range_set_grow(rs, prealloc);
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}
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void range_set_release(struct range_set *rs)
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{
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FREE_AND_NULL(rs->ranges);
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rs->alloc = rs->nr = 0;
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}
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/* dst must be uninitialized! */
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static void range_set_copy(struct range_set *dst, struct range_set *src)
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{
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range_set_init(dst, src->nr);
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COPY_ARRAY(dst->ranges, src->ranges, src->nr);
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dst->nr = src->nr;
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}
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static void range_set_move(struct range_set *dst, struct range_set *src)
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{
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range_set_release(dst);
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dst->ranges = src->ranges;
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dst->nr = src->nr;
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dst->alloc = src->alloc;
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src->ranges = NULL;
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src->alloc = src->nr = 0;
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}
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/* tack on a _new_ range _at the end_ */
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void range_set_append_unsafe(struct range_set *rs, long a, long b)
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{
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assert(a <= b);
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range_set_grow(rs, 1);
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rs->ranges[rs->nr].start = a;
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rs->ranges[rs->nr].end = b;
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rs->nr++;
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}
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void range_set_append(struct range_set *rs, long a, long b)
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{
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assert(rs->nr == 0 || rs->ranges[rs->nr-1].end <= a);
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range_set_append_unsafe(rs, a, b);
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}
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static int range_cmp(const void *_r, const void *_s)
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{
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const struct range *r = _r;
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const struct range *s = _s;
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/* this could be simply 'return r.start-s.start', but for the types */
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if (r->start == s->start)
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return 0;
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if (r->start < s->start)
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return -1;
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return 1;
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}
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/*
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* Check that the ranges are non-empty, sorted and non-overlapping
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*/
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static void range_set_check_invariants(struct range_set *rs)
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{
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unsigned int i;
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if (!rs)
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return;
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if (rs->nr)
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assert(rs->ranges[0].start < rs->ranges[0].end);
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for (i = 1; i < rs->nr; i++) {
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assert(rs->ranges[i-1].end < rs->ranges[i].start);
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assert(rs->ranges[i].start < rs->ranges[i].end);
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}
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}
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/*
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* In-place pass of sorting and merging the ranges in the range set,
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* to establish the invariants when we get the ranges from the user
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*/
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void sort_and_merge_range_set(struct range_set *rs)
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{
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unsigned int i;
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unsigned int o = 0; /* output cursor */
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QSORT(rs->ranges, rs->nr, range_cmp);
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for (i = 0; i < rs->nr; i++) {
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if (rs->ranges[i].start == rs->ranges[i].end)
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continue;
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if (o > 0 && rs->ranges[i].start <= rs->ranges[o-1].end) {
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if (rs->ranges[o-1].end < rs->ranges[i].end)
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rs->ranges[o-1].end = rs->ranges[i].end;
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} else {
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rs->ranges[o].start = rs->ranges[i].start;
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rs->ranges[o].end = rs->ranges[i].end;
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o++;
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}
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}
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assert(o <= rs->nr);
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rs->nr = o;
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range_set_check_invariants(rs);
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}
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/*
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* Union of range sets (i.e., sets of line numbers). Used to merge
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* them when searches meet at a common ancestor.
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*
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* This is also where the ranges are consolidated into canonical form:
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* overlapping and adjacent ranges are merged, and empty ranges are
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* removed.
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*/
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static void range_set_union(struct range_set *out,
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struct range_set *a, struct range_set *b)
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{
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unsigned int i = 0, j = 0;
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struct range *ra = a->ranges;
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struct range *rb = b->ranges;
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/* cannot make an alias of out->ranges: it may change during grow */
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assert(out->nr == 0);
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while (i < a->nr || j < b->nr) {
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struct range *new_range;
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if (i < a->nr && j < b->nr) {
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if (ra[i].start < rb[j].start)
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new_range = &ra[i++];
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else if (ra[i].start > rb[j].start)
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new_range = &rb[j++];
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else if (ra[i].end < rb[j].end)
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new_range = &ra[i++];
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else
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new_range = &rb[j++];
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} else if (i < a->nr) /* b exhausted */
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new_range = &ra[i++];
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else /* a exhausted */
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new_range = &rb[j++];
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if (new_range->start == new_range->end)
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; /* empty range */
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else if (!out->nr || out->ranges[out->nr-1].end < new_range->start) {
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range_set_grow(out, 1);
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out->ranges[out->nr].start = new_range->start;
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out->ranges[out->nr].end = new_range->end;
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out->nr++;
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} else if (out->ranges[out->nr-1].end < new_range->end) {
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out->ranges[out->nr-1].end = new_range->end;
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}
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}
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}
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/*
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* Difference of range sets (out = a \ b). Pass the "interesting"
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* ranges as 'a' and the target side of the diff as 'b': it removes
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* the ranges for which the commit is responsible.
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*/
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static void range_set_difference(struct range_set *out,
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struct range_set *a, struct range_set *b)
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{
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unsigned int i, j = 0;
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for (i = 0; i < a->nr; i++) {
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long start = a->ranges[i].start;
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long end = a->ranges[i].end;
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while (start < end) {
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while (j < b->nr && start >= b->ranges[j].end)
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/*
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* a: |-------
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* b: ------|
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*/
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j++;
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if (j >= b->nr || end < b->ranges[j].start) {
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/*
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* b exhausted, or
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* a: ----|
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* b: |----
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*/
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range_set_append(out, start, end);
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break;
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}
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if (start >= b->ranges[j].start) {
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/*
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* a: |--????
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* b: |------|
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*/
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start = b->ranges[j].end;
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} else if (end > b->ranges[j].start) {
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/*
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* a: |-----|
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* b: |--?????
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*/
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if (start < b->ranges[j].start)
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range_set_append(out, start, b->ranges[j].start);
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start = b->ranges[j].end;
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}
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}
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}
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}
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static void diff_ranges_init(struct diff_ranges *diff)
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{
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range_set_init(&diff->parent, 0);
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range_set_init(&diff->target, 0);
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}
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static void diff_ranges_release(struct diff_ranges *diff)
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{
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range_set_release(&diff->parent);
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range_set_release(&diff->target);
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}
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static void line_log_data_init(struct line_log_data *r)
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{
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memset(r, 0, sizeof(struct line_log_data));
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range_set_init(&r->ranges, 0);
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}
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static void line_log_data_clear(struct line_log_data *r)
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{
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range_set_release(&r->ranges);
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if (r->pair)
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diff_free_filepair(r->pair);
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}
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static void free_line_log_data(struct line_log_data *r)
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{
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while (r) {
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struct line_log_data *next = r->next;
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line_log_data_clear(r);
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free(r);
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r = next;
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}
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}
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static struct line_log_data *
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search_line_log_data(struct line_log_data *list, const char *path,
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struct line_log_data **insertion_point)
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{
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struct line_log_data *p = list;
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if (insertion_point)
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*insertion_point = NULL;
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while (p) {
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int cmp = strcmp(p->path, path);
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if (!cmp)
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return p;
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if (insertion_point && cmp < 0)
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*insertion_point = p;
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p = p->next;
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}
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return NULL;
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}
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/*
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* Note: takes ownership of 'path', which happens to be what the only
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* caller needs.
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*/
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static void line_log_data_insert(struct line_log_data **list,
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char *path,
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long begin, long end)
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{
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struct line_log_data *ip;
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struct line_log_data *p = search_line_log_data(*list, path, &ip);
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if (p) {
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range_set_append_unsafe(&p->ranges, begin, end);
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free(path);
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return;
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}
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p = xcalloc(1, sizeof(struct line_log_data));
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p->path = path;
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range_set_append(&p->ranges, begin, end);
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if (ip) {
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p->next = ip->next;
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ip->next = p;
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} else {
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p->next = *list;
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*list = p;
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}
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}
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struct collect_diff_cbdata {
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struct diff_ranges *diff;
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};
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static int collect_diff_cb(long start_a, long count_a,
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long start_b, long count_b,
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void *data)
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{
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struct collect_diff_cbdata *d = data;
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if (count_a >= 0)
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range_set_append(&d->diff->parent, start_a, start_a + count_a);
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if (count_b >= 0)
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range_set_append(&d->diff->target, start_b, start_b + count_b);
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return 0;
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}
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static int collect_diff(mmfile_t *parent, mmfile_t *target, struct diff_ranges *out)
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{
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struct collect_diff_cbdata cbdata = {NULL};
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xpparam_t xpp;
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xdemitconf_t xecfg;
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xdemitcb_t ecb;
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memset(&xpp, 0, sizeof(xpp));
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memset(&xecfg, 0, sizeof(xecfg));
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xecfg.ctxlen = xecfg.interhunkctxlen = 0;
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cbdata.diff = out;
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xecfg.hunk_func = collect_diff_cb;
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memset(&ecb, 0, sizeof(ecb));
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ecb.priv = &cbdata;
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return xdi_diff(parent, target, &xpp, &xecfg, &ecb);
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}
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/*
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* These are handy for debugging. Removing them with #if 0 silences
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* the "unused function" warning.
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*/
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#if 0
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static void dump_range_set(struct range_set *rs, const char *desc)
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{
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int i;
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printf("range set %s (%d items):\n", desc, rs->nr);
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for (i = 0; i < rs->nr; i++)
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printf("\t[%ld,%ld]\n", rs->ranges[i].start, rs->ranges[i].end);
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}
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static void dump_line_log_data(struct line_log_data *r)
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{
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char buf[4096];
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while (r) {
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snprintf(buf, 4096, "file %s\n", r->path);
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dump_range_set(&r->ranges, buf);
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r = r->next;
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}
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}
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static void dump_diff_ranges(struct diff_ranges *diff, const char *desc)
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{
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int i;
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assert(diff->parent.nr == diff->target.nr);
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printf("diff ranges %s (%d items):\n", desc, diff->parent.nr);
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printf("\tparent\ttarget\n");
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for (i = 0; i < diff->parent.nr; i++) {
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printf("\t[%ld,%ld]\t[%ld,%ld]\n",
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diff->parent.ranges[i].start,
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diff->parent.ranges[i].end,
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diff->target.ranges[i].start,
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diff->target.ranges[i].end);
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}
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}
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#endif
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static int ranges_overlap(struct range *a, struct range *b)
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{
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return !(a->end <= b->start || b->end <= a->start);
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}
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/*
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* Given a diff and the set of interesting ranges, determine all hunks
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* of the diff which touch (overlap) at least one of the interesting
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* ranges in the target.
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*/
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static void diff_ranges_filter_touched(struct diff_ranges *out,
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struct diff_ranges *diff,
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struct range_set *rs)
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{
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unsigned int i, j = 0;
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assert(out->target.nr == 0);
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for (i = 0; i < diff->target.nr; i++) {
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while (diff->target.ranges[i].start > rs->ranges[j].end) {
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j++;
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if (j == rs->nr)
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return;
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}
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if (ranges_overlap(&diff->target.ranges[i], &rs->ranges[j])) {
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range_set_append(&out->parent,
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diff->parent.ranges[i].start,
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diff->parent.ranges[i].end);
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range_set_append(&out->target,
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diff->target.ranges[i].start,
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diff->target.ranges[i].end);
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}
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}
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}
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/*
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* Adjust the line counts in 'rs' to account for the lines
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* added/removed in the diff.
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*/
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static void range_set_shift_diff(struct range_set *out,
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struct range_set *rs,
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struct diff_ranges *diff)
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{
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unsigned int i, j = 0;
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long offset = 0;
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struct range *src = rs->ranges;
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struct range *target = diff->target.ranges;
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struct range *parent = diff->parent.ranges;
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for (i = 0; i < rs->nr; i++) {
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while (j < diff->target.nr && src[i].start >= target[j].start) {
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offset += (parent[j].end-parent[j].start)
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- (target[j].end-target[j].start);
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j++;
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}
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range_set_append(out, src[i].start+offset, src[i].end+offset);
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}
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}
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/*
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* Given a diff and the set of interesting ranges, map the ranges
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* across the diff. That is: observe that the target commit takes
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* blame for all the + (target-side) ranges. So for every pair of
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* ranges in the diff that was touched, we remove the latter and add
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* its parent side.
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*/
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static void range_set_map_across_diff(struct range_set *out,
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struct range_set *rs,
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struct diff_ranges *diff,
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struct diff_ranges **touched_out)
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{
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struct diff_ranges *touched = xmalloc(sizeof(*touched));
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struct range_set tmp1 = RANGE_SET_INIT;
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struct range_set tmp2 = RANGE_SET_INIT;
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diff_ranges_init(touched);
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diff_ranges_filter_touched(touched, diff, rs);
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range_set_difference(&tmp1, rs, &touched->target);
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range_set_shift_diff(&tmp2, &tmp1, diff);
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range_set_union(out, &tmp2, &touched->parent);
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range_set_release(&tmp1);
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range_set_release(&tmp2);
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*touched_out = touched;
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}
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static struct commit *check_single_commit(struct rev_info *revs)
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{
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struct object *commit = NULL;
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int found = -1;
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int i;
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for (i = 0; i < revs->pending.nr; i++) {
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struct object *obj = revs->pending.objects[i].item;
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if (obj->flags & UNINTERESTING)
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continue;
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obj = deref_tag(revs->repo, obj, NULL, 0);
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if (obj->type != OBJ_COMMIT)
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die("Non commit %s?", revs->pending.objects[i].name);
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if (commit)
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die("More than one commit to dig from: %s and %s?",
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revs->pending.objects[i].name,
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revs->pending.objects[found].name);
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commit = obj;
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found = i;
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}
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if (!commit)
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die("No commit specified?");
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return (struct commit *) commit;
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}
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static void fill_blob_sha1(struct repository *r, struct commit *commit,
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struct diff_filespec *spec)
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{
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unsigned short mode;
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struct object_id oid;
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if (get_tree_entry(r, &commit->object.oid, spec->path, &oid, &mode))
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die("There is no path %s in the commit", spec->path);
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fill_filespec(spec, &oid, 1, mode);
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return;
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|
}
|
|
|
|
static void fill_line_ends(struct repository *r,
|
|
struct diff_filespec *spec,
|
|
long *lines,
|
|
unsigned long **line_ends)
|
|
{
|
|
int num = 0, size = 50;
|
|
long cur = 0;
|
|
unsigned long *ends = NULL;
|
|
char *data = NULL;
|
|
|
|
if (diff_populate_filespec(r, spec, 0))
|
|
die("Cannot read blob %s", oid_to_hex(&spec->oid));
|
|
|
|
ALLOC_ARRAY(ends, size);
|
|
ends[cur++] = 0;
|
|
data = spec->data;
|
|
while (num < spec->size) {
|
|
if (data[num] == '\n' || num == spec->size - 1) {
|
|
ALLOC_GROW(ends, (cur + 1), size);
|
|
ends[cur++] = num;
|
|
}
|
|
num++;
|
|
}
|
|
|
|
/* shrink the array to fit the elements */
|
|
REALLOC_ARRAY(ends, cur);
|
|
*lines = cur-1;
|
|
*line_ends = ends;
|
|
}
|
|
|
|
struct nth_line_cb {
|
|
struct diff_filespec *spec;
|
|
long lines;
|
|
unsigned long *line_ends;
|
|
};
|
|
|
|
static const char *nth_line(void *data, long line)
|
|
{
|
|
struct nth_line_cb *d = data;
|
|
assert(d && line <= d->lines);
|
|
assert(d->spec && d->spec->data);
|
|
|
|
if (line == 0)
|
|
return (char *)d->spec->data;
|
|
else
|
|
return (char *)d->spec->data + d->line_ends[line] + 1;
|
|
}
|
|
|
|
static struct line_log_data *
|
|
parse_lines(struct repository *r, struct commit *commit,
|
|
const char *prefix, struct string_list *args)
|
|
{
|
|
long lines = 0;
|
|
unsigned long *ends = NULL;
|
|
struct nth_line_cb cb_data;
|
|
struct string_list_item *item;
|
|
struct line_log_data *ranges = NULL;
|
|
struct line_log_data *p;
|
|
|
|
for_each_string_list_item(item, args) {
|
|
const char *name_part, *range_part;
|
|
char *full_name;
|
|
struct diff_filespec *spec;
|
|
long begin = 0, end = 0;
|
|
long anchor;
|
|
|
|
name_part = skip_range_arg(item->string, r->index);
|
|
if (!name_part || *name_part != ':' || !name_part[1])
|
|
die("-L argument not 'start,end:file' or ':funcname:file': %s",
|
|
item->string);
|
|
range_part = xstrndup(item->string, name_part - item->string);
|
|
name_part++;
|
|
|
|
full_name = prefix_path(prefix, prefix ? strlen(prefix) : 0,
|
|
name_part);
|
|
|
|
spec = alloc_filespec(full_name);
|
|
fill_blob_sha1(r, commit, spec);
|
|
fill_line_ends(r, spec, &lines, &ends);
|
|
cb_data.spec = spec;
|
|
cb_data.lines = lines;
|
|
cb_data.line_ends = ends;
|
|
|
|
p = search_line_log_data(ranges, full_name, NULL);
|
|
if (p && p->ranges.nr)
|
|
anchor = p->ranges.ranges[p->ranges.nr - 1].end + 1;
|
|
else
|
|
anchor = 1;
|
|
|
|
if (parse_range_arg(range_part, nth_line, &cb_data,
|
|
lines, anchor, &begin, &end,
|
|
full_name, r->index))
|
|
die("malformed -L argument '%s'", range_part);
|
|
if ((!lines && (begin || end)) || lines < begin)
|
|
die("file %s has only %lu lines", name_part, lines);
|
|
if (begin < 1)
|
|
begin = 1;
|
|
if (end < 1 || lines < end)
|
|
end = lines;
|
|
begin--;
|
|
line_log_data_insert(&ranges, full_name, begin, end);
|
|
|
|
free_filespec(spec);
|
|
FREE_AND_NULL(ends);
|
|
}
|
|
|
|
for (p = ranges; p; p = p->next)
|
|
sort_and_merge_range_set(&p->ranges);
|
|
|
|
return ranges;
|
|
}
|
|
|
|
static struct line_log_data *line_log_data_copy_one(struct line_log_data *r)
|
|
{
|
|
struct line_log_data *ret = xmalloc(sizeof(*ret));
|
|
|
|
assert(r);
|
|
line_log_data_init(ret);
|
|
range_set_copy(&ret->ranges, &r->ranges);
|
|
|
|
ret->path = xstrdup(r->path);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct line_log_data *
|
|
line_log_data_copy(struct line_log_data *r)
|
|
{
|
|
struct line_log_data *ret = NULL;
|
|
struct line_log_data *tmp = NULL, *prev = NULL;
|
|
|
|
assert(r);
|
|
ret = tmp = prev = line_log_data_copy_one(r);
|
|
r = r->next;
|
|
while (r) {
|
|
tmp = line_log_data_copy_one(r);
|
|
prev->next = tmp;
|
|
prev = tmp;
|
|
r = r->next;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* merge two range sets across files */
|
|
static struct line_log_data *line_log_data_merge(struct line_log_data *a,
|
|
struct line_log_data *b)
|
|
{
|
|
struct line_log_data *head = NULL, **pp = &head;
|
|
|
|
while (a || b) {
|
|
struct line_log_data *src;
|
|
struct line_log_data *src2 = NULL;
|
|
struct line_log_data *d;
|
|
int cmp;
|
|
if (!a)
|
|
cmp = 1;
|
|
else if (!b)
|
|
cmp = -1;
|
|
else
|
|
cmp = strcmp(a->path, b->path);
|
|
if (cmp < 0) {
|
|
src = a;
|
|
a = a->next;
|
|
} else if (cmp == 0) {
|
|
src = a;
|
|
a = a->next;
|
|
src2 = b;
|
|
b = b->next;
|
|
} else {
|
|
src = b;
|
|
b = b->next;
|
|
}
|
|
d = xmalloc(sizeof(struct line_log_data));
|
|
line_log_data_init(d);
|
|
d->path = xstrdup(src->path);
|
|
*pp = d;
|
|
pp = &d->next;
|
|
if (src2)
|
|
range_set_union(&d->ranges, &src->ranges, &src2->ranges);
|
|
else
|
|
range_set_copy(&d->ranges, &src->ranges);
|
|
}
|
|
|
|
return head;
|
|
}
|
|
|
|
static void add_line_range(struct rev_info *revs, struct commit *commit,
|
|
struct line_log_data *range)
|
|
{
|
|
struct line_log_data *old_line = NULL;
|
|
struct line_log_data *new_line = NULL;
|
|
|
|
old_line = lookup_decoration(&revs->line_log_data, &commit->object);
|
|
if (old_line && range) {
|
|
new_line = line_log_data_merge(old_line, range);
|
|
free_line_log_data(old_line);
|
|
} else if (range)
|
|
new_line = line_log_data_copy(range);
|
|
|
|
if (new_line)
|
|
add_decoration(&revs->line_log_data, &commit->object, new_line);
|
|
}
|
|
|
|
static void clear_commit_line_range(struct rev_info *revs, struct commit *commit)
|
|
{
|
|
struct line_log_data *r;
|
|
r = lookup_decoration(&revs->line_log_data, &commit->object);
|
|
if (!r)
|
|
return;
|
|
free_line_log_data(r);
|
|
add_decoration(&revs->line_log_data, &commit->object, NULL);
|
|
}
|
|
|
|
static struct line_log_data *lookup_line_range(struct rev_info *revs,
|
|
struct commit *commit)
|
|
{
|
|
struct line_log_data *ret = NULL;
|
|
struct line_log_data *d;
|
|
|
|
ret = lookup_decoration(&revs->line_log_data, &commit->object);
|
|
|
|
for (d = ret; d; d = d->next)
|
|
range_set_check_invariants(&d->ranges);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void line_log_init(struct rev_info *rev, const char *prefix, struct string_list *args)
|
|
{
|
|
struct commit *commit = NULL;
|
|
struct line_log_data *range;
|
|
|
|
commit = check_single_commit(rev);
|
|
range = parse_lines(rev->diffopt.repo, commit, prefix, args);
|
|
add_line_range(rev, commit, range);
|
|
|
|
if (!rev->diffopt.detect_rename) {
|
|
struct line_log_data *r;
|
|
struct argv_array array = ARGV_ARRAY_INIT;
|
|
const char **paths;
|
|
|
|
for (r = range; r; r = r->next)
|
|
argv_array_push(&array, r->path);
|
|
paths = argv_array_detach(&array);
|
|
|
|
parse_pathspec(&rev->diffopt.pathspec, 0,
|
|
PATHSPEC_PREFER_FULL, "", paths);
|
|
/* strings are now owned by pathspec */
|
|
free(paths);
|
|
}
|
|
}
|
|
|
|
static void move_diff_queue(struct diff_queue_struct *dst,
|
|
struct diff_queue_struct *src)
|
|
{
|
|
assert(src != dst);
|
|
memcpy(dst, src, sizeof(struct diff_queue_struct));
|
|
DIFF_QUEUE_CLEAR(src);
|
|
}
|
|
|
|
static void filter_diffs_for_paths(struct line_log_data *range, int keep_deletions)
|
|
{
|
|
int i;
|
|
struct diff_queue_struct outq;
|
|
DIFF_QUEUE_CLEAR(&outq);
|
|
|
|
for (i = 0; i < diff_queued_diff.nr; i++) {
|
|
struct diff_filepair *p = diff_queued_diff.queue[i];
|
|
struct line_log_data *rg = NULL;
|
|
|
|
if (!DIFF_FILE_VALID(p->two)) {
|
|
if (keep_deletions)
|
|
diff_q(&outq, p);
|
|
else
|
|
diff_free_filepair(p);
|
|
continue;
|
|
}
|
|
for (rg = range; rg; rg = rg->next) {
|
|
if (!strcmp(rg->path, p->two->path))
|
|
break;
|
|
}
|
|
if (rg)
|
|
diff_q(&outq, p);
|
|
else
|
|
diff_free_filepair(p);
|
|
}
|
|
free(diff_queued_diff.queue);
|
|
diff_queued_diff = outq;
|
|
}
|
|
|
|
static inline int diff_might_be_rename(void)
|
|
{
|
|
int i;
|
|
for (i = 0; i < diff_queued_diff.nr; i++)
|
|
if (!DIFF_FILE_VALID(diff_queued_diff.queue[i]->one)) {
|
|
/* fprintf(stderr, "diff_might_be_rename found creation of: %s\n", */
|
|
/* diff_queued_diff.queue[i]->two->path); */
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void queue_diffs(struct line_log_data *range,
|
|
struct diff_options *opt,
|
|
struct diff_queue_struct *queue,
|
|
struct commit *commit, struct commit *parent)
|
|
{
|
|
assert(commit);
|
|
|
|
DIFF_QUEUE_CLEAR(&diff_queued_diff);
|
|
diff_tree_oid(parent ? get_commit_tree_oid(parent) : NULL,
|
|
get_commit_tree_oid(commit), "", opt);
|
|
if (opt->detect_rename) {
|
|
filter_diffs_for_paths(range, 1);
|
|
if (diff_might_be_rename())
|
|
diffcore_std(opt);
|
|
filter_diffs_for_paths(range, 0);
|
|
}
|
|
move_diff_queue(queue, &diff_queued_diff);
|
|
}
|
|
|
|
static char *get_nth_line(long line, unsigned long *ends, void *data)
|
|
{
|
|
if (line == 0)
|
|
return (char *)data;
|
|
else
|
|
return (char *)data + ends[line] + 1;
|
|
}
|
|
|
|
static void print_line(const char *prefix, char first,
|
|
long line, unsigned long *ends, void *data,
|
|
const char *color, const char *reset, FILE *file)
|
|
{
|
|
char *begin = get_nth_line(line, ends, data);
|
|
char *end = get_nth_line(line+1, ends, data);
|
|
int had_nl = 0;
|
|
|
|
if (end > begin && end[-1] == '\n') {
|
|
end--;
|
|
had_nl = 1;
|
|
}
|
|
|
|
fputs(prefix, file);
|
|
fputs(color, file);
|
|
putc(first, file);
|
|
fwrite(begin, 1, end-begin, file);
|
|
fputs(reset, file);
|
|
putc('\n', file);
|
|
if (!had_nl)
|
|
fputs("\\ No newline at end of file\n", file);
|
|
}
|
|
|
|
static char *output_prefix(struct diff_options *opt)
|
|
{
|
|
char *prefix = "";
|
|
|
|
if (opt->output_prefix) {
|
|
struct strbuf *sb = opt->output_prefix(opt, opt->output_prefix_data);
|
|
prefix = sb->buf;
|
|
}
|
|
|
|
return prefix;
|
|
}
|
|
|
|
static void dump_diff_hacky_one(struct rev_info *rev, struct line_log_data *range)
|
|
{
|
|
unsigned int i, j = 0;
|
|
long p_lines, t_lines;
|
|
unsigned long *p_ends = NULL, *t_ends = NULL;
|
|
struct diff_filepair *pair = range->pair;
|
|
struct diff_ranges *diff = &range->diff;
|
|
|
|
struct diff_options *opt = &rev->diffopt;
|
|
char *prefix = output_prefix(opt);
|
|
const char *c_reset = diff_get_color(opt->use_color, DIFF_RESET);
|
|
const char *c_frag = diff_get_color(opt->use_color, DIFF_FRAGINFO);
|
|
const char *c_meta = diff_get_color(opt->use_color, DIFF_METAINFO);
|
|
const char *c_old = diff_get_color(opt->use_color, DIFF_FILE_OLD);
|
|
const char *c_new = diff_get_color(opt->use_color, DIFF_FILE_NEW);
|
|
const char *c_context = diff_get_color(opt->use_color, DIFF_CONTEXT);
|
|
|
|
if (!pair || !diff)
|
|
return;
|
|
|
|
if (pair->one->oid_valid)
|
|
fill_line_ends(rev->diffopt.repo, pair->one, &p_lines, &p_ends);
|
|
fill_line_ends(rev->diffopt.repo, pair->two, &t_lines, &t_ends);
|
|
|
|
fprintf(opt->file, "%s%sdiff --git a/%s b/%s%s\n", prefix, c_meta, pair->one->path, pair->two->path, c_reset);
|
|
fprintf(opt->file, "%s%s--- %s%s%s\n", prefix, c_meta,
|
|
pair->one->oid_valid ? "a/" : "",
|
|
pair->one->oid_valid ? pair->one->path : "/dev/null",
|
|
c_reset);
|
|
fprintf(opt->file, "%s%s+++ b/%s%s\n", prefix, c_meta, pair->two->path, c_reset);
|
|
for (i = 0; i < range->ranges.nr; i++) {
|
|
long p_start, p_end;
|
|
long t_start = range->ranges.ranges[i].start;
|
|
long t_end = range->ranges.ranges[i].end;
|
|
long t_cur = t_start;
|
|
unsigned int j_last;
|
|
|
|
while (j < diff->target.nr && diff->target.ranges[j].end < t_start)
|
|
j++;
|
|
if (j == diff->target.nr || diff->target.ranges[j].start > t_end)
|
|
continue;
|
|
|
|
/* Scan ahead to determine the last diff that falls in this range */
|
|
j_last = j;
|
|
while (j_last < diff->target.nr && diff->target.ranges[j_last].start < t_end)
|
|
j_last++;
|
|
if (j_last > j)
|
|
j_last--;
|
|
|
|
/*
|
|
* Compute parent hunk headers: we know that the diff
|
|
* has the correct line numbers (but not all hunks).
|
|
* So it suffices to shift the start/end according to
|
|
* the line numbers of the first/last hunk(s) that
|
|
* fall in this range.
|
|
*/
|
|
if (t_start < diff->target.ranges[j].start)
|
|
p_start = diff->parent.ranges[j].start - (diff->target.ranges[j].start-t_start);
|
|
else
|
|
p_start = diff->parent.ranges[j].start;
|
|
if (t_end > diff->target.ranges[j_last].end)
|
|
p_end = diff->parent.ranges[j_last].end + (t_end-diff->target.ranges[j_last].end);
|
|
else
|
|
p_end = diff->parent.ranges[j_last].end;
|
|
|
|
if (!p_start && !p_end) {
|
|
p_start = -1;
|
|
p_end = -1;
|
|
}
|
|
|
|
/* Now output a diff hunk for this range */
|
|
fprintf(opt->file, "%s%s@@ -%ld,%ld +%ld,%ld @@%s\n",
|
|
prefix, c_frag,
|
|
p_start+1, p_end-p_start, t_start+1, t_end-t_start,
|
|
c_reset);
|
|
while (j < diff->target.nr && diff->target.ranges[j].start < t_end) {
|
|
int k;
|
|
for (; t_cur < diff->target.ranges[j].start; t_cur++)
|
|
print_line(prefix, ' ', t_cur, t_ends, pair->two->data,
|
|
c_context, c_reset, opt->file);
|
|
for (k = diff->parent.ranges[j].start; k < diff->parent.ranges[j].end; k++)
|
|
print_line(prefix, '-', k, p_ends, pair->one->data,
|
|
c_old, c_reset, opt->file);
|
|
for (; t_cur < diff->target.ranges[j].end && t_cur < t_end; t_cur++)
|
|
print_line(prefix, '+', t_cur, t_ends, pair->two->data,
|
|
c_new, c_reset, opt->file);
|
|
j++;
|
|
}
|
|
for (; t_cur < t_end; t_cur++)
|
|
print_line(prefix, ' ', t_cur, t_ends, pair->two->data,
|
|
c_context, c_reset, opt->file);
|
|
}
|
|
|
|
free(p_ends);
|
|
free(t_ends);
|
|
}
|
|
|
|
/*
|
|
* NEEDSWORK: manually building a diff here is not the Right
|
|
* Thing(tm). log -L should be built into the diff pipeline.
|
|
*/
|
|
static void dump_diff_hacky(struct rev_info *rev, struct line_log_data *range)
|
|
{
|
|
fprintf(rev->diffopt.file, "%s\n", output_prefix(&rev->diffopt));
|
|
while (range) {
|
|
dump_diff_hacky_one(rev, range);
|
|
range = range->next;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Unlike most other functions, this destructively operates on
|
|
* 'range'.
|
|
*/
|
|
static int process_diff_filepair(struct rev_info *rev,
|
|
struct diff_filepair *pair,
|
|
struct line_log_data *range,
|
|
struct diff_ranges **diff_out)
|
|
{
|
|
struct line_log_data *rg = range;
|
|
struct range_set tmp;
|
|
struct diff_ranges diff;
|
|
mmfile_t file_parent, file_target;
|
|
|
|
assert(pair->two->path);
|
|
while (rg) {
|
|
assert(rg->path);
|
|
if (!strcmp(rg->path, pair->two->path))
|
|
break;
|
|
rg = rg->next;
|
|
}
|
|
|
|
if (!rg)
|
|
return 0;
|
|
if (rg->ranges.nr == 0)
|
|
return 0;
|
|
|
|
assert(pair->two->oid_valid);
|
|
diff_populate_filespec(rev->diffopt.repo, pair->two, 0);
|
|
file_target.ptr = pair->two->data;
|
|
file_target.size = pair->two->size;
|
|
|
|
if (pair->one->oid_valid) {
|
|
diff_populate_filespec(rev->diffopt.repo, pair->one, 0);
|
|
file_parent.ptr = pair->one->data;
|
|
file_parent.size = pair->one->size;
|
|
} else {
|
|
file_parent.ptr = "";
|
|
file_parent.size = 0;
|
|
}
|
|
|
|
diff_ranges_init(&diff);
|
|
if (collect_diff(&file_parent, &file_target, &diff))
|
|
die("unable to generate diff for %s", pair->one->path);
|
|
|
|
/* NEEDSWORK should apply some heuristics to prevent mismatches */
|
|
free(rg->path);
|
|
rg->path = xstrdup(pair->one->path);
|
|
|
|
range_set_init(&tmp, 0);
|
|
range_set_map_across_diff(&tmp, &rg->ranges, &diff, diff_out);
|
|
range_set_release(&rg->ranges);
|
|
range_set_move(&rg->ranges, &tmp);
|
|
|
|
diff_ranges_release(&diff);
|
|
|
|
return ((*diff_out)->parent.nr > 0);
|
|
}
|
|
|
|
static struct diff_filepair *diff_filepair_dup(struct diff_filepair *pair)
|
|
{
|
|
struct diff_filepair *new_filepair = xmalloc(sizeof(struct diff_filepair));
|
|
new_filepair->one = pair->one;
|
|
new_filepair->two = pair->two;
|
|
new_filepair->one->count++;
|
|
new_filepair->two->count++;
|
|
return new_filepair;
|
|
}
|
|
|
|
static void free_diffqueues(int n, struct diff_queue_struct *dq)
|
|
{
|
|
int i, j;
|
|
for (i = 0; i < n; i++)
|
|
for (j = 0; j < dq[i].nr; j++)
|
|
diff_free_filepair(dq[i].queue[j]);
|
|
free(dq);
|
|
}
|
|
|
|
static int process_all_files(struct line_log_data **range_out,
|
|
struct rev_info *rev,
|
|
struct diff_queue_struct *queue,
|
|
struct line_log_data *range)
|
|
{
|
|
int i, changed = 0;
|
|
|
|
*range_out = line_log_data_copy(range);
|
|
|
|
for (i = 0; i < queue->nr; i++) {
|
|
struct diff_ranges *pairdiff = NULL;
|
|
struct diff_filepair *pair = queue->queue[i];
|
|
if (process_diff_filepair(rev, pair, *range_out, &pairdiff)) {
|
|
/*
|
|
* Store away the diff for later output. We
|
|
* tuck it in the ranges we got as _input_,
|
|
* since that's the commit that caused the
|
|
* diff.
|
|
*
|
|
* NEEDSWORK not enough when we get around to
|
|
* doing something interesting with merges;
|
|
* currently each invocation on a merge parent
|
|
* trashes the previous one's diff.
|
|
*
|
|
* NEEDSWORK tramples over data structures not owned here
|
|
*/
|
|
struct line_log_data *rg = range;
|
|
changed++;
|
|
while (rg && strcmp(rg->path, pair->two->path))
|
|
rg = rg->next;
|
|
assert(rg);
|
|
rg->pair = diff_filepair_dup(queue->queue[i]);
|
|
memcpy(&rg->diff, pairdiff, sizeof(struct diff_ranges));
|
|
}
|
|
free(pairdiff);
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
int line_log_print(struct rev_info *rev, struct commit *commit)
|
|
{
|
|
|
|
show_log(rev);
|
|
if (!(rev->diffopt.output_format & DIFF_FORMAT_NO_OUTPUT)) {
|
|
struct line_log_data *range = lookup_line_range(rev, commit);
|
|
dump_diff_hacky(rev, range);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int process_ranges_ordinary_commit(struct rev_info *rev, struct commit *commit,
|
|
struct line_log_data *range)
|
|
{
|
|
struct commit *parent = NULL;
|
|
struct diff_queue_struct queue;
|
|
struct line_log_data *parent_range;
|
|
int changed;
|
|
|
|
if (commit->parents)
|
|
parent = commit->parents->item;
|
|
|
|
queue_diffs(range, &rev->diffopt, &queue, commit, parent);
|
|
changed = process_all_files(&parent_range, rev, &queue, range);
|
|
if (parent)
|
|
add_line_range(rev, parent, parent_range);
|
|
free_line_log_data(parent_range);
|
|
return changed;
|
|
}
|
|
|
|
static int process_ranges_merge_commit(struct rev_info *rev, struct commit *commit,
|
|
struct line_log_data *range)
|
|
{
|
|
struct diff_queue_struct *diffqueues;
|
|
struct line_log_data **cand;
|
|
struct commit **parents;
|
|
struct commit_list *p;
|
|
int i;
|
|
int nparents = commit_list_count(commit->parents);
|
|
|
|
if (nparents > 1 && rev->first_parent_only)
|
|
nparents = 1;
|
|
|
|
ALLOC_ARRAY(diffqueues, nparents);
|
|
ALLOC_ARRAY(cand, nparents);
|
|
ALLOC_ARRAY(parents, nparents);
|
|
|
|
p = commit->parents;
|
|
for (i = 0; i < nparents; i++) {
|
|
parents[i] = p->item;
|
|
p = p->next;
|
|
queue_diffs(range, &rev->diffopt, &diffqueues[i], commit, parents[i]);
|
|
}
|
|
|
|
for (i = 0; i < nparents; i++) {
|
|
int changed;
|
|
cand[i] = NULL;
|
|
changed = process_all_files(&cand[i], rev, &diffqueues[i], range);
|
|
if (!changed) {
|
|
/*
|
|
* This parent can take all the blame, so we
|
|
* don't follow any other path in history
|
|
*/
|
|
add_line_range(rev, parents[i], cand[i]);
|
|
clear_commit_line_range(rev, commit);
|
|
commit_list_append(parents[i], &commit->parents);
|
|
free(parents);
|
|
free(cand);
|
|
free_diffqueues(nparents, diffqueues);
|
|
/* NEEDSWORK leaking like a sieve */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* No single parent took the blame. We add the candidates
|
|
* from the above loop to the parents.
|
|
*/
|
|
for (i = 0; i < nparents; i++) {
|
|
add_line_range(rev, parents[i], cand[i]);
|
|
}
|
|
|
|
clear_commit_line_range(rev, commit);
|
|
free(parents);
|
|
free(cand);
|
|
free_diffqueues(nparents, diffqueues);
|
|
return 1;
|
|
|
|
/* NEEDSWORK evil merge detection stuff */
|
|
/* NEEDSWORK leaking like a sieve */
|
|
}
|
|
|
|
static int process_ranges_arbitrary_commit(struct rev_info *rev, struct commit *commit)
|
|
{
|
|
struct line_log_data *range = lookup_line_range(rev, commit);
|
|
int changed = 0;
|
|
|
|
if (range) {
|
|
if (!commit->parents || !commit->parents->next)
|
|
changed = process_ranges_ordinary_commit(rev, commit, range);
|
|
else
|
|
changed = process_ranges_merge_commit(rev, commit, range);
|
|
}
|
|
|
|
if (!changed)
|
|
commit->object.flags |= TREESAME;
|
|
|
|
return changed;
|
|
}
|
|
|
|
static enum rewrite_result line_log_rewrite_one(struct rev_info *rev, struct commit **pp)
|
|
{
|
|
for (;;) {
|
|
struct commit *p = *pp;
|
|
if (p->parents && p->parents->next)
|
|
return rewrite_one_ok;
|
|
if (p->object.flags & UNINTERESTING)
|
|
return rewrite_one_ok;
|
|
if (!(p->object.flags & TREESAME))
|
|
return rewrite_one_ok;
|
|
if (!p->parents)
|
|
return rewrite_one_noparents;
|
|
*pp = p->parents->item;
|
|
}
|
|
}
|
|
|
|
int line_log_filter(struct rev_info *rev)
|
|
{
|
|
struct commit *commit;
|
|
struct commit_list *list = rev->commits;
|
|
struct commit_list *out = NULL, **pp = &out;
|
|
|
|
while (list) {
|
|
struct commit_list *to_free = NULL;
|
|
commit = list->item;
|
|
if (process_ranges_arbitrary_commit(rev, commit)) {
|
|
*pp = list;
|
|
pp = &list->next;
|
|
} else
|
|
to_free = list;
|
|
list = list->next;
|
|
free(to_free);
|
|
}
|
|
*pp = NULL;
|
|
|
|
for (list = out; list; list = list->next)
|
|
rewrite_parents(rev, list->item, line_log_rewrite_one);
|
|
|
|
rev->commits = out;
|
|
|
|
return 0;
|
|
}
|