mirror of
https://github.com/git/git
synced 2024-08-27 11:39:22 +00:00
![Adam Simpkins](/assets/img/avatar_default.png)
Previously, the graphing code printed lines coming out of a merge commit for all of its parents, even if some of them were uninteresting. Now it only prints lines for interesting commits. For example, for a merge commit where only the first parent is interesting, the code now prints: * merge commit * interesting child instead of: M merge commit |\ * interesting child Signed-off-by: Adam Simpkins <adam@adamsimpkins.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
980 lines
24 KiB
C
980 lines
24 KiB
C
#include "cache.h"
|
|
#include "commit.h"
|
|
#include "graph.h"
|
|
#include "diff.h"
|
|
#include "revision.h"
|
|
|
|
/*
|
|
* TODO:
|
|
* - Add colors to the graph.
|
|
* Pick a color for each column, and print all characters
|
|
* in that column with the specified color.
|
|
*
|
|
* - Limit the number of columns, similar to the way gitk does.
|
|
* If we reach more than a specified number of columns, omit
|
|
* sections of some columns.
|
|
*
|
|
* - The output during the GRAPH_PRE_COMMIT and GRAPH_COLLAPSING states
|
|
* could be made more compact by printing horizontal lines, instead of
|
|
* long diagonal lines. For example, during collapsing, something like
|
|
* this: instead of this:
|
|
* | | | | | | | | | |
|
|
* | |_|_|/ | | | |/
|
|
* |/| | | | | |/|
|
|
* | | | | | |/| |
|
|
* |/| | |
|
|
* | | | |
|
|
*
|
|
* If there are several parallel diagonal lines, they will need to be
|
|
* replaced with horizontal lines on subsequent rows.
|
|
*/
|
|
|
|
struct column {
|
|
/*
|
|
* The parent commit of this column.
|
|
*/
|
|
struct commit *commit;
|
|
/*
|
|
* XXX: Once we add support for colors, struct column could also
|
|
* contain the color of its branch line.
|
|
*/
|
|
};
|
|
|
|
enum graph_state {
|
|
GRAPH_PADDING,
|
|
GRAPH_SKIP,
|
|
GRAPH_PRE_COMMIT,
|
|
GRAPH_COMMIT,
|
|
GRAPH_POST_MERGE,
|
|
GRAPH_COLLAPSING
|
|
};
|
|
|
|
struct git_graph {
|
|
/*
|
|
* The commit currently being processed
|
|
*/
|
|
struct commit *commit;
|
|
/*
|
|
* The number of interesting parents that this commit has.
|
|
*
|
|
* Note that this is not the same as the actual number of parents.
|
|
* This count excludes parents that won't be printed in the graph
|
|
* output, as determined by graph_is_interesting().
|
|
*/
|
|
int num_parents;
|
|
/*
|
|
* The width of the graph output for this commit.
|
|
* All rows for this commit are padded to this width, so that
|
|
* messages printed after the graph output are aligned.
|
|
*/
|
|
int width;
|
|
/*
|
|
* The next expansion row to print
|
|
* when state is GRAPH_PRE_COMMIT
|
|
*/
|
|
int expansion_row;
|
|
/*
|
|
* The current output state.
|
|
* This tells us what kind of line graph_next_line() should output.
|
|
*/
|
|
enum graph_state state;
|
|
/*
|
|
* The maximum number of columns that can be stored in the columns
|
|
* and new_columns arrays. This is also half the number of entries
|
|
* that can be stored in the mapping and new_mapping arrays.
|
|
*/
|
|
int column_capacity;
|
|
/*
|
|
* The number of columns (also called "branch lines" in some places)
|
|
*/
|
|
int num_columns;
|
|
/*
|
|
* The number of columns in the new_columns array
|
|
*/
|
|
int num_new_columns;
|
|
/*
|
|
* The number of entries in the mapping array
|
|
*/
|
|
int mapping_size;
|
|
/*
|
|
* The column state before we output the current commit.
|
|
*/
|
|
struct column *columns;
|
|
/*
|
|
* The new column state after we output the current commit.
|
|
* Only valid when state is GRAPH_COLLAPSING.
|
|
*/
|
|
struct column *new_columns;
|
|
/*
|
|
* An array that tracks the current state of each
|
|
* character in the output line during state GRAPH_COLLAPSING.
|
|
* Each entry is -1 if this character is empty, or a non-negative
|
|
* integer if the character contains a branch line. The value of
|
|
* the integer indicates the target position for this branch line.
|
|
* (I.e., this array maps the current column positions to their
|
|
* desired positions.)
|
|
*
|
|
* The maximum capacity of this array is always
|
|
* sizeof(int) * 2 * column_capacity.
|
|
*/
|
|
int *mapping;
|
|
/*
|
|
* A temporary array for computing the next mapping state
|
|
* while we are outputting a mapping line. This is stored as part
|
|
* of the git_graph simply so we don't have to allocate a new
|
|
* temporary array each time we have to output a collapsing line.
|
|
*/
|
|
int *new_mapping;
|
|
};
|
|
|
|
struct git_graph *graph_init(void)
|
|
{
|
|
struct git_graph *graph = xmalloc(sizeof(struct git_graph));
|
|
graph->commit = NULL;
|
|
graph->num_parents = 0;
|
|
graph->expansion_row = 0;
|
|
graph->state = GRAPH_PADDING;
|
|
graph->num_columns = 0;
|
|
graph->num_new_columns = 0;
|
|
graph->mapping_size = 0;
|
|
|
|
/*
|
|
* Allocate a reasonably large default number of columns
|
|
* We'll automatically grow columns later if we need more room.
|
|
*/
|
|
graph->column_capacity = 30;
|
|
graph->columns = xmalloc(sizeof(struct column) *
|
|
graph->column_capacity);
|
|
graph->new_columns = xmalloc(sizeof(struct column) *
|
|
graph->column_capacity);
|
|
graph->mapping = xmalloc(sizeof(int) * 2 * graph->column_capacity);
|
|
graph->new_mapping = xmalloc(sizeof(int) * 2 * graph->column_capacity);
|
|
|
|
return graph;
|
|
}
|
|
|
|
void graph_release(struct git_graph *graph)
|
|
{
|
|
free(graph->columns);
|
|
free(graph->new_columns);
|
|
free(graph->mapping);
|
|
free(graph);
|
|
}
|
|
|
|
static void graph_ensure_capacity(struct git_graph *graph, int num_columns)
|
|
{
|
|
if (graph->column_capacity >= num_columns)
|
|
return;
|
|
|
|
do {
|
|
graph->column_capacity *= 2;
|
|
} while (graph->column_capacity < num_columns);
|
|
|
|
graph->columns = xrealloc(graph->columns,
|
|
sizeof(struct column) *
|
|
graph->column_capacity);
|
|
graph->new_columns = xrealloc(graph->new_columns,
|
|
sizeof(struct column) *
|
|
graph->column_capacity);
|
|
graph->mapping = xrealloc(graph->mapping,
|
|
sizeof(int) * 2 * graph->column_capacity);
|
|
graph->new_mapping = xrealloc(graph->new_mapping,
|
|
sizeof(int) * 2 * graph->column_capacity);
|
|
}
|
|
|
|
/*
|
|
* Returns 1 if the commit will be printed in the graph output,
|
|
* and 0 otherwise.
|
|
*/
|
|
static int graph_is_interesting(struct commit *commit)
|
|
{
|
|
/*
|
|
* Uninteresting and pruned commits won't be printed
|
|
*/
|
|
return (commit->object.flags & (UNINTERESTING | TREESAME)) ? 0 : 1;
|
|
}
|
|
|
|
static void graph_insert_into_new_columns(struct git_graph *graph,
|
|
struct commit *commit,
|
|
int *mapping_index)
|
|
{
|
|
int i;
|
|
|
|
/*
|
|
* Ignore uinteresting commits
|
|
*/
|
|
if (!graph_is_interesting(commit))
|
|
return;
|
|
|
|
/*
|
|
* If the commit is already in the new_columns list, we don't need to
|
|
* add it. Just update the mapping correctly.
|
|
*/
|
|
for (i = 0; i < graph->num_new_columns; i++) {
|
|
if (graph->new_columns[i].commit == commit) {
|
|
graph->mapping[*mapping_index] = i;
|
|
*mapping_index += 2;
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This commit isn't already in new_columns. Add it.
|
|
*/
|
|
graph->new_columns[graph->num_new_columns].commit = commit;
|
|
graph->mapping[*mapping_index] = graph->num_new_columns;
|
|
*mapping_index += 2;
|
|
graph->num_new_columns++;
|
|
}
|
|
|
|
static void graph_update_width(struct git_graph *graph,
|
|
int is_commit_in_existing_columns)
|
|
{
|
|
/*
|
|
* Compute the width needed to display the graph for this commit.
|
|
* This is the maximum width needed for any row. All other rows
|
|
* will be padded to this width.
|
|
*
|
|
* Compute the number of columns in the widest row:
|
|
* Count each existing column (graph->num_columns), and each new
|
|
* column added by this commit.
|
|
*/
|
|
int max_cols = graph->num_columns + graph->num_parents;
|
|
|
|
/*
|
|
* Even if the current commit has no parents to be printed, it
|
|
* still takes up a column for itself.
|
|
*/
|
|
if (graph->num_parents < 1)
|
|
max_cols++;
|
|
|
|
/*
|
|
* We added a column for the the current commit as part of
|
|
* graph->num_parents. If the current commit was already in
|
|
* graph->columns, then we have double counted it.
|
|
*/
|
|
if (is_commit_in_existing_columns)
|
|
max_cols--;
|
|
|
|
/*
|
|
* Each column takes up 2 spaces
|
|
*/
|
|
graph->width = max_cols * 2;
|
|
}
|
|
|
|
static void graph_update_columns(struct git_graph *graph)
|
|
{
|
|
struct commit_list *parent;
|
|
struct column *tmp_columns;
|
|
int max_new_columns;
|
|
int mapping_idx;
|
|
int i, seen_this, is_commit_in_columns;
|
|
|
|
/*
|
|
* Swap graph->columns with graph->new_columns
|
|
* graph->columns contains the state for the previous commit,
|
|
* and new_columns now contains the state for our commit.
|
|
*
|
|
* We'll re-use the old columns array as storage to compute the new
|
|
* columns list for the commit after this one.
|
|
*/
|
|
tmp_columns = graph->columns;
|
|
graph->columns = graph->new_columns;
|
|
graph->num_columns = graph->num_new_columns;
|
|
|
|
graph->new_columns = tmp_columns;
|
|
graph->num_new_columns = 0;
|
|
|
|
/*
|
|
* Now update new_columns and mapping with the information for the
|
|
* commit after this one.
|
|
*
|
|
* First, make sure we have enough room. At most, there will
|
|
* be graph->num_columns + graph->num_parents columns for the next
|
|
* commit.
|
|
*/
|
|
max_new_columns = graph->num_columns + graph->num_parents;
|
|
graph_ensure_capacity(graph, max_new_columns);
|
|
|
|
/*
|
|
* Clear out graph->mapping
|
|
*/
|
|
graph->mapping_size = 2 * max_new_columns;
|
|
for (i = 0; i < graph->mapping_size; i++)
|
|
graph->mapping[i] = -1;
|
|
|
|
/*
|
|
* Populate graph->new_columns and graph->mapping
|
|
*
|
|
* Some of the parents of this commit may already be in
|
|
* graph->columns. If so, graph->new_columns should only contain a
|
|
* single entry for each such commit. graph->mapping should
|
|
* contain information about where each current branch line is
|
|
* supposed to end up after the collapsing is performed.
|
|
*/
|
|
seen_this = 0;
|
|
mapping_idx = 0;
|
|
is_commit_in_columns = 1;
|
|
for (i = 0; i <= graph->num_columns; i++) {
|
|
struct commit *col_commit;
|
|
if (i == graph->num_columns) {
|
|
if (seen_this)
|
|
break;
|
|
is_commit_in_columns = 0;
|
|
col_commit = graph->commit;
|
|
} else {
|
|
col_commit = graph->columns[i].commit;
|
|
}
|
|
|
|
if (col_commit == graph->commit) {
|
|
int old_mapping_idx = mapping_idx;
|
|
seen_this = 1;
|
|
for (parent = graph->commit->parents;
|
|
parent;
|
|
parent = parent->next) {
|
|
graph_insert_into_new_columns(graph,
|
|
parent->item,
|
|
&mapping_idx);
|
|
}
|
|
/*
|
|
* We always need to increment mapping_idx by at
|
|
* least 2, even if it has no interesting parents.
|
|
* The current commit always takes up at least 2
|
|
* spaces.
|
|
*/
|
|
if (mapping_idx == old_mapping_idx)
|
|
mapping_idx += 2;
|
|
} else {
|
|
graph_insert_into_new_columns(graph, col_commit,
|
|
&mapping_idx);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Shrink mapping_size to be the minimum necessary
|
|
*/
|
|
while (graph->mapping_size > 1 &&
|
|
graph->mapping[graph->mapping_size - 1] < 0)
|
|
graph->mapping_size--;
|
|
|
|
/*
|
|
* Compute graph->width for this commit
|
|
*/
|
|
graph_update_width(graph, is_commit_in_columns);
|
|
}
|
|
|
|
void graph_update(struct git_graph *graph, struct commit *commit)
|
|
{
|
|
struct commit_list *parent;
|
|
|
|
/*
|
|
* Set the new commit
|
|
*/
|
|
graph->commit = commit;
|
|
|
|
/*
|
|
* Count how many interesting parents this commit has
|
|
*/
|
|
graph->num_parents = 0;
|
|
for (parent = commit->parents; parent; parent = parent->next) {
|
|
if (graph_is_interesting(parent->item))
|
|
graph->num_parents++;
|
|
}
|
|
|
|
/*
|
|
* Call graph_update_columns() to update
|
|
* columns, new_columns, and mapping.
|
|
*/
|
|
graph_update_columns(graph);
|
|
|
|
graph->expansion_row = 0;
|
|
|
|
/*
|
|
* Update graph->state.
|
|
*
|
|
* If the previous commit didn't get to the GRAPH_PADDING state,
|
|
* it never finished its output. Goto GRAPH_SKIP, to print out
|
|
* a line to indicate that portion of the graph is missing.
|
|
*
|
|
* Otherwise, if there are 3 or more parents, we need to print
|
|
* extra rows before the commit, to expand the branch lines around
|
|
* it and make room for it.
|
|
*
|
|
* If there are less than 3 parents, we can immediately print the
|
|
* commit line.
|
|
*/
|
|
if (graph->state != GRAPH_PADDING)
|
|
graph->state = GRAPH_SKIP;
|
|
else if (graph->num_parents >= 3)
|
|
graph->state = GRAPH_PRE_COMMIT;
|
|
else
|
|
graph->state = GRAPH_COMMIT;
|
|
}
|
|
|
|
static int graph_is_mapping_correct(struct git_graph *graph)
|
|
{
|
|
int i;
|
|
|
|
/*
|
|
* The mapping is up to date if each entry is at its target,
|
|
* or is 1 greater than its target.
|
|
* (If it is 1 greater than the target, '/' will be printed, so it
|
|
* will look correct on the next row.)
|
|
*/
|
|
for (i = 0; i < graph->mapping_size; i++) {
|
|
int target = graph->mapping[i];
|
|
if (target < 0)
|
|
continue;
|
|
if (target == (i / 2))
|
|
continue;
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void graph_pad_horizontally(struct git_graph *graph, struct strbuf *sb)
|
|
{
|
|
/*
|
|
* Add additional spaces to the end of the strbuf, so that all
|
|
* lines for a particular commit have the same width.
|
|
*
|
|
* This way, fields printed to the right of the graph will remain
|
|
* aligned for the entire commit.
|
|
*/
|
|
int extra;
|
|
if (sb->len >= graph->width)
|
|
return;
|
|
|
|
extra = graph->width - sb->len;
|
|
strbuf_addf(sb, "%*s", (int) extra, "");
|
|
}
|
|
|
|
static void graph_output_padding_line(struct git_graph *graph,
|
|
struct strbuf *sb)
|
|
{
|
|
int i;
|
|
|
|
/*
|
|
* We could conceivable be called with a NULL commit
|
|
* if our caller has a bug, and invokes graph_next_line()
|
|
* immediately after graph_init(), without first calling
|
|
* graph_update(). Return without outputting anything in this
|
|
* case.
|
|
*/
|
|
if (!graph->commit)
|
|
return;
|
|
|
|
/*
|
|
* Output a padding row, that leaves all branch lines unchanged
|
|
*/
|
|
for (i = 0; i < graph->num_new_columns; i++) {
|
|
strbuf_addstr(sb, "| ");
|
|
}
|
|
|
|
graph_pad_horizontally(graph, sb);
|
|
}
|
|
|
|
static void graph_output_skip_line(struct git_graph *graph, struct strbuf *sb)
|
|
{
|
|
/*
|
|
* Output an ellipsis to indicate that a portion
|
|
* of the graph is missing.
|
|
*/
|
|
strbuf_addstr(sb, "...");
|
|
graph_pad_horizontally(graph, sb);
|
|
|
|
if (graph->num_parents >= 3)
|
|
graph->state = GRAPH_PRE_COMMIT;
|
|
else
|
|
graph->state = GRAPH_COMMIT;
|
|
}
|
|
|
|
static void graph_output_pre_commit_line(struct git_graph *graph,
|
|
struct strbuf *sb)
|
|
{
|
|
int num_expansion_rows;
|
|
int i, seen_this;
|
|
|
|
/*
|
|
* This function formats a row that increases the space around a commit
|
|
* with multiple parents, to make room for it. It should only be
|
|
* called when there are 3 or more parents.
|
|
*
|
|
* We need 2 extra rows for every parent over 2.
|
|
*/
|
|
assert(graph->num_parents >= 3);
|
|
num_expansion_rows = (graph->num_parents - 2) * 2;
|
|
|
|
/*
|
|
* graph->expansion_row tracks the current expansion row we are on.
|
|
* It should be in the range [0, num_expansion_rows - 1]
|
|
*/
|
|
assert(0 <= graph->expansion_row &&
|
|
graph->expansion_row < num_expansion_rows);
|
|
|
|
/*
|
|
* Output the row
|
|
*/
|
|
seen_this = 0;
|
|
for (i = 0; i < graph->num_columns; i++) {
|
|
struct column *col = &graph->columns[i];
|
|
if (col->commit == graph->commit) {
|
|
seen_this = 1;
|
|
strbuf_addf(sb, "| %*s", graph->expansion_row, "");
|
|
} else if (seen_this) {
|
|
strbuf_addstr(sb, "\\ ");
|
|
} else {
|
|
strbuf_addstr(sb, "| ");
|
|
}
|
|
}
|
|
|
|
graph_pad_horizontally(graph, sb);
|
|
|
|
/*
|
|
* Increment graph->expansion_row,
|
|
* and move to state GRAPH_COMMIT if necessary
|
|
*/
|
|
graph->expansion_row++;
|
|
if (graph->expansion_row >= num_expansion_rows)
|
|
graph->state = GRAPH_COMMIT;
|
|
}
|
|
|
|
void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb)
|
|
{
|
|
int seen_this = 0;
|
|
int i, j;
|
|
|
|
/*
|
|
* Output the row containing this commit
|
|
* Iterate up to and including graph->num_columns,
|
|
* since the current commit may not be in any of the existing
|
|
* columns. (This happens when the current commit doesn't have any
|
|
* children that we have already processed.)
|
|
*/
|
|
seen_this = 0;
|
|
for (i = 0; i <= graph->num_columns; i++) {
|
|
struct commit *col_commit;
|
|
if (i == graph->num_columns) {
|
|
if (seen_this)
|
|
break;
|
|
col_commit = graph->commit;
|
|
} else {
|
|
col_commit = graph->columns[i].commit;
|
|
}
|
|
|
|
if (col_commit == graph->commit) {
|
|
seen_this = 1;
|
|
/*
|
|
* If the commit has more than 1 interesting
|
|
* parent, print 'M' to indicate that it is a
|
|
* merge. Otherwise, print '*'.
|
|
*
|
|
* Note that even if this is actually a merge
|
|
* commit, we still print '*' if less than 2 of its
|
|
* parents are interesting.
|
|
*/
|
|
if (graph->num_parents > 1)
|
|
strbuf_addch(sb, 'M');
|
|
else
|
|
strbuf_addch(sb, '*');
|
|
|
|
if (graph->num_parents < 2)
|
|
strbuf_addch(sb, ' ');
|
|
else if (graph->num_parents == 2)
|
|
strbuf_addstr(sb, " ");
|
|
else {
|
|
int num_dashes =
|
|
((graph->num_parents - 2) * 2) - 1;
|
|
for (j = 0; j < num_dashes; j++)
|
|
strbuf_addch(sb, '-');
|
|
strbuf_addstr(sb, ". ");
|
|
}
|
|
} else if (seen_this && (graph->num_parents > 1)) {
|
|
strbuf_addstr(sb, "\\ ");
|
|
} else {
|
|
strbuf_addstr(sb, "| ");
|
|
}
|
|
}
|
|
|
|
graph_pad_horizontally(graph, sb);
|
|
|
|
/*
|
|
* Update graph->state
|
|
*/
|
|
if (graph->num_parents > 1)
|
|
graph->state = GRAPH_POST_MERGE;
|
|
else if (graph_is_mapping_correct(graph))
|
|
graph->state = GRAPH_PADDING;
|
|
else
|
|
graph->state = GRAPH_COLLAPSING;
|
|
}
|
|
|
|
void graph_output_post_merge_line(struct git_graph *graph, struct strbuf *sb)
|
|
{
|
|
int seen_this = 0;
|
|
int i, j;
|
|
|
|
/*
|
|
* Output the post-merge row
|
|
*/
|
|
for (i = 0; i <= graph->num_columns; i++) {
|
|
struct commit *col_commit;
|
|
if (i == graph->num_columns) {
|
|
if (seen_this)
|
|
break;
|
|
col_commit = graph->commit;
|
|
} else {
|
|
col_commit = graph->columns[i].commit;
|
|
}
|
|
|
|
if (col_commit == graph->commit) {
|
|
seen_this = 1;
|
|
strbuf_addch(sb, '|');
|
|
for (j = 0; j < graph->num_parents - 1; j++)
|
|
strbuf_addstr(sb, "\\ ");
|
|
if (graph->num_parents == 2)
|
|
strbuf_addch(sb, ' ');
|
|
} else if (seen_this && (graph->num_parents > 2)) {
|
|
strbuf_addstr(sb, "\\ ");
|
|
} else {
|
|
strbuf_addstr(sb, "| ");
|
|
}
|
|
}
|
|
|
|
graph_pad_horizontally(graph, sb);
|
|
|
|
/*
|
|
* Update graph->state
|
|
*/
|
|
if (graph_is_mapping_correct(graph))
|
|
graph->state = GRAPH_PADDING;
|
|
else
|
|
graph->state = GRAPH_COLLAPSING;
|
|
}
|
|
|
|
void graph_output_collapsing_line(struct git_graph *graph, struct strbuf *sb)
|
|
{
|
|
int i;
|
|
int *tmp_mapping;
|
|
|
|
/*
|
|
* Clear out the new_mapping array
|
|
*/
|
|
for (i = 0; i < graph->mapping_size; i++)
|
|
graph->new_mapping[i] = -1;
|
|
|
|
for (i = 0; i < graph->mapping_size; i++) {
|
|
int target = graph->mapping[i];
|
|
if (target < 0)
|
|
continue;
|
|
|
|
/*
|
|
* Since update_columns() always inserts the leftmost
|
|
* column first, each branch's target location should
|
|
* always be either its current location or to the left of
|
|
* its current location.
|
|
*
|
|
* We never have to move branches to the right. This makes
|
|
* the graph much more legible, since whenever branches
|
|
* cross, only one is moving directions.
|
|
*/
|
|
assert(target * 2 <= i);
|
|
|
|
if (target * 2 == i) {
|
|
/*
|
|
* This column is already in the
|
|
* correct place
|
|
*/
|
|
assert(graph->new_mapping[i] == -1);
|
|
graph->new_mapping[i] = target;
|
|
} else if (graph->new_mapping[i - 1] < 0) {
|
|
/*
|
|
* Nothing is to the left.
|
|
* Move to the left by one
|
|
*/
|
|
graph->new_mapping[i - 1] = target;
|
|
} else if (graph->new_mapping[i - 1] == target) {
|
|
/*
|
|
* There is a branch line to our left
|
|
* already, and it is our target. We
|
|
* combine with this line, since we share
|
|
* the same parent commit.
|
|
*
|
|
* We don't have to add anything to the
|
|
* output or new_mapping, since the
|
|
* existing branch line has already taken
|
|
* care of it.
|
|
*/
|
|
} else {
|
|
/*
|
|
* There is a branch line to our left,
|
|
* but it isn't our target. We need to
|
|
* cross over it.
|
|
*
|
|
* The space just to the left of this
|
|
* branch should always be empty.
|
|
*/
|
|
assert(graph->new_mapping[i - 1] > target);
|
|
assert(graph->new_mapping[i - 2] < 0);
|
|
graph->new_mapping[i - 2] = target;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The new mapping may be 1 smaller than the old mapping
|
|
*/
|
|
if (graph->new_mapping[graph->mapping_size - 1] < 0)
|
|
graph->mapping_size--;
|
|
|
|
/*
|
|
* Output out a line based on the new mapping info
|
|
*/
|
|
for (i = 0; i < graph->mapping_size; i++) {
|
|
int target = graph->new_mapping[i];
|
|
if (target < 0)
|
|
strbuf_addch(sb, ' ');
|
|
else if (target * 2 == i)
|
|
strbuf_addch(sb, '|');
|
|
else
|
|
strbuf_addch(sb, '/');
|
|
}
|
|
|
|
graph_pad_horizontally(graph, sb);
|
|
|
|
/*
|
|
* Swap mapping and new_mapping
|
|
*/
|
|
tmp_mapping = graph->mapping;
|
|
graph->mapping = graph->new_mapping;
|
|
graph->new_mapping = tmp_mapping;
|
|
|
|
/*
|
|
* If graph->mapping indicates that all of the branch lines
|
|
* are already in the correct positions, we are done.
|
|
* Otherwise, we need to collapse some branch lines together.
|
|
*/
|
|
if (graph_is_mapping_correct(graph))
|
|
graph->state = GRAPH_PADDING;
|
|
}
|
|
|
|
int graph_next_line(struct git_graph *graph, struct strbuf *sb)
|
|
{
|
|
switch (graph->state) {
|
|
case GRAPH_PADDING:
|
|
graph_output_padding_line(graph, sb);
|
|
return 0;
|
|
case GRAPH_SKIP:
|
|
graph_output_skip_line(graph, sb);
|
|
return 0;
|
|
case GRAPH_PRE_COMMIT:
|
|
graph_output_pre_commit_line(graph, sb);
|
|
return 0;
|
|
case GRAPH_COMMIT:
|
|
graph_output_commit_line(graph, sb);
|
|
return 1;
|
|
case GRAPH_POST_MERGE:
|
|
graph_output_post_merge_line(graph, sb);
|
|
return 0;
|
|
case GRAPH_COLLAPSING:
|
|
graph_output_collapsing_line(graph, sb);
|
|
return 0;
|
|
}
|
|
|
|
assert(0);
|
|
return 0;
|
|
}
|
|
|
|
void graph_padding_line(struct git_graph *graph, struct strbuf *sb)
|
|
{
|
|
int i, j;
|
|
|
|
if (graph->state != GRAPH_COMMIT) {
|
|
graph_next_line(graph, sb);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Output the row containing this commit
|
|
* Iterate up to and including graph->num_columns,
|
|
* since the current commit may not be in any of the existing
|
|
* columns. (This happens when the current commit doesn't have any
|
|
* children that we have already processed.)
|
|
*/
|
|
for (i = 0; i < graph->num_columns; i++) {
|
|
struct commit *col_commit = graph->columns[i].commit;
|
|
if (col_commit == graph->commit) {
|
|
strbuf_addch(sb, '|');
|
|
|
|
if (graph->num_parents < 3)
|
|
strbuf_addch(sb, ' ');
|
|
else {
|
|
int num_spaces = ((graph->num_parents - 2) * 2);
|
|
for (j = 0; j < num_spaces; j++)
|
|
strbuf_addch(sb, ' ');
|
|
}
|
|
} else {
|
|
strbuf_addstr(sb, "| ");
|
|
}
|
|
}
|
|
|
|
graph_pad_horizontally(graph, sb);
|
|
}
|
|
|
|
int graph_is_commit_finished(struct git_graph const *graph)
|
|
{
|
|
return (graph->state == GRAPH_PADDING);
|
|
}
|
|
|
|
void graph_show_commit(struct git_graph *graph)
|
|
{
|
|
struct strbuf msgbuf;
|
|
int shown_commit_line = 0;
|
|
|
|
if (!graph)
|
|
return;
|
|
|
|
strbuf_init(&msgbuf, 0);
|
|
|
|
while (!shown_commit_line) {
|
|
shown_commit_line = graph_next_line(graph, &msgbuf);
|
|
fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
|
|
if (!shown_commit_line)
|
|
putchar('\n');
|
|
strbuf_setlen(&msgbuf, 0);
|
|
}
|
|
|
|
strbuf_release(&msgbuf);
|
|
}
|
|
|
|
void graph_show_oneline(struct git_graph *graph)
|
|
{
|
|
struct strbuf msgbuf;
|
|
|
|
if (!graph)
|
|
return;
|
|
|
|
strbuf_init(&msgbuf, 0);
|
|
graph_next_line(graph, &msgbuf);
|
|
fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
|
|
strbuf_release(&msgbuf);
|
|
}
|
|
|
|
void graph_show_padding(struct git_graph *graph)
|
|
{
|
|
struct strbuf msgbuf;
|
|
|
|
if (!graph)
|
|
return;
|
|
|
|
strbuf_init(&msgbuf, 0);
|
|
graph_padding_line(graph, &msgbuf);
|
|
fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
|
|
strbuf_release(&msgbuf);
|
|
}
|
|
|
|
int graph_show_remainder(struct git_graph *graph)
|
|
{
|
|
struct strbuf msgbuf;
|
|
int shown = 0;
|
|
|
|
if (!graph)
|
|
return 0;
|
|
|
|
if (graph_is_commit_finished(graph))
|
|
return 0;
|
|
|
|
strbuf_init(&msgbuf, 0);
|
|
for (;;) {
|
|
graph_next_line(graph, &msgbuf);
|
|
fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout);
|
|
strbuf_setlen(&msgbuf, 0);
|
|
shown = 1;
|
|
|
|
if (!graph_is_commit_finished(graph))
|
|
putchar('\n');
|
|
else
|
|
break;
|
|
}
|
|
strbuf_release(&msgbuf);
|
|
|
|
return shown;
|
|
}
|
|
|
|
|
|
void graph_show_strbuf(struct git_graph *graph, struct strbuf const *sb)
|
|
{
|
|
char *p;
|
|
|
|
if (!graph) {
|
|
fwrite(sb->buf, sizeof(char), sb->len, stdout);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Print the strbuf line by line,
|
|
* and display the graph info before each line but the first.
|
|
*/
|
|
p = sb->buf;
|
|
while (p) {
|
|
size_t len;
|
|
char *next_p = strchr(p, '\n');
|
|
if (next_p) {
|
|
next_p++;
|
|
len = next_p - p;
|
|
} else {
|
|
len = (sb->buf + sb->len) - p;
|
|
}
|
|
fwrite(p, sizeof(char), len, stdout);
|
|
if (next_p && *next_p != '\0')
|
|
graph_show_oneline(graph);
|
|
p = next_p;
|
|
}
|
|
}
|
|
|
|
void graph_show_commit_msg(struct git_graph *graph,
|
|
struct strbuf const *sb)
|
|
{
|
|
int newline_terminated;
|
|
|
|
if (!graph) {
|
|
/*
|
|
* If there's no graph, just print the message buffer.
|
|
*
|
|
* The message buffer for CMIT_FMT_ONELINE and
|
|
* CMIT_FMT_USERFORMAT are already missing a terminating
|
|
* newline. All of the other formats should have it.
|
|
*/
|
|
fwrite(sb->buf, sizeof(char), sb->len, stdout);
|
|
return;
|
|
}
|
|
|
|
newline_terminated = (sb->len && sb->buf[sb->len - 1] == '\n');
|
|
|
|
/*
|
|
* Show the commit message
|
|
*/
|
|
graph_show_strbuf(graph, sb);
|
|
|
|
/*
|
|
* If there is more output needed for this commit, show it now
|
|
*/
|
|
if (!graph_is_commit_finished(graph)) {
|
|
/*
|
|
* If sb doesn't have a terminating newline, print one now,
|
|
* so we can start the remainder of the graph output on a
|
|
* new line.
|
|
*/
|
|
if (!newline_terminated)
|
|
putchar('\n');
|
|
|
|
graph_show_remainder(graph);
|
|
|
|
/*
|
|
* If sb ends with a newline, our output should too.
|
|
*/
|
|
if (newline_terminated)
|
|
putchar('\n');
|
|
}
|
|
}
|