diff options
| -rw-r--r-- | graph.c | 63 | ||||
| -rwxr-xr-x | t/t4215-log-skewed-merges.sh | 147 |
2 files changed, 203 insertions, 7 deletions
@@ -217,6 +217,46 @@ struct git_graph { */ int merge_layout; /* + * The number of columns added to the graph by the current commit. For + * 2-way and octopus merges, this is is usually one less than the + * number of parents: + * + * | | | | | \ + * | * | | *---. \ + * | |\ \ | |\ \ \ \ + * | | | | | | | | | | + * + * num_parents: 2 num_parents: 4 + * edges_added: 1 edges_added: 3 + * + * For left-skewed merges, the first parent fuses with its neighbor and + * so one less column is added: + * + * | | | | | \ + * | * | | *-. \ + * |/| | |/|\ \ \ + * | | | | | | | | + * + * num_parents: 2 num_parents: 4 + * edges_added: 0 edges_added: 2 + * + * This number determines how edges to the right of the merge are + * displayed in commit and post-merge lines; if no columns have been + * added then a vertical line should be used where a right-tracking + * line would otherwise be used. + * + * | * \ | * | + * | |\ \ |/| | + * | | * \ | * | + */ + int edges_added; + /* + * The number of columns added by the previous commit, which is used to + * smooth edges appearing to the right of a commit in a commit line + * following a post-merge line. + */ + int prev_edges_added; + /* * 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. @@ -328,6 +368,8 @@ struct git_graph *graph_init(struct rev_info *opt) graph->commit_index = 0; graph->prev_commit_index = 0; graph->merge_layout = 0; + graph->edges_added = 0; + graph->prev_edges_added = 0; graph->num_columns = 0; graph->num_new_columns = 0; graph->mapping_size = 0; @@ -689,6 +731,9 @@ void graph_update(struct git_graph *graph, struct commit *commit) */ graph_update_columns(graph); + graph->prev_edges_added = graph->edges_added; + graph->edges_added = graph->num_parents + graph->merge_layout - 2; + graph->expansion_row = 0; /* @@ -947,12 +992,13 @@ static void graph_output_commit_line(struct git_graph *graph, struct graph_line if (graph->num_parents > 2) graph_draw_octopus_merge(graph, line); - } else if (seen_this && (graph->num_parents > 2)) { + } else if (seen_this && (graph->edges_added > 1)) { graph_line_write_column(line, col, '\\'); - } else if (seen_this && (graph->num_parents == 2)) { + } else if (seen_this && (graph->edges_added == 1)) { /* - * This is a 2-way merge commit. - * There is no GRAPH_PRE_COMMIT stage for 2-way + * This is either a right-skewed 2-way merge + * commit, or a left-skewed 3-way merge. + * There is no GRAPH_PRE_COMMIT stage for such * merges, so this is the first line of output * for this commit. Check to see what the previous * line of output was. @@ -964,6 +1010,7 @@ static void graph_output_commit_line(struct git_graph *graph, struct graph_line * makes the output look nicer. */ if (graph->prev_state == GRAPH_POST_MERGE && + graph->prev_edges_added > 0 && graph->prev_commit_index < i) graph_line_write_column(line, col, '\\'); else @@ -1033,8 +1080,14 @@ static void graph_output_post_merge_line(struct git_graph *graph, struct graph_l else idx++; } + if (graph->edges_added == 0) + graph_line_addch(line, ' '); + } else if (seen_this) { - graph_line_write_column(line, col, '\\'); + if (graph->edges_added > 0) + graph_line_write_column(line, col, '\\'); + else + graph_line_write_column(line, col, '|'); graph_line_addch(line, ' '); } else { graph_line_write_column(line, col, '|'); diff --git a/t/t4215-log-skewed-merges.sh b/t/t4215-log-skewed-merges.sh index dc187b5caf..e673cdb6f7 100755 --- a/t/t4215-log-skewed-merges.sh +++ b/t/t4215-log-skewed-merges.sh @@ -11,7 +11,7 @@ test_expect_success 'log --graph with merge fusing with its left and right neigh | * G | |\ | | * F - | * \ E + | * | E |/|\ \ | | |/ | | * D @@ -43,7 +43,7 @@ test_expect_success 'log --graph with left-skewed merge' ' | | | | * 0_G | |_|_|/| |/| | | | - | | | * \ 0_F + | | | * | 0_F | |_|/|\ \ |/| | | |/ | | | | * 0_E @@ -73,4 +73,147 @@ test_expect_success 'log --graph with left-skewed merge' ' test_cmp expect actual ' +test_expect_success 'log --graph with nested left-skewed merge' ' + cat >expect <<-\EOF && + * 1_H + |\ + | * 1_G + | |\ + | | * 1_F + | * | 1_E + |/| | + | * | 1_D + * | | 1_C + |/ / + * | 1_B + |/ + * 1_A + EOF + + git checkout --orphan 1_p && + test_commit 1_A && + test_commit 1_B && + test_commit 1_C && + git checkout -b 1_q @^ && test_commit 1_D && + git checkout 1_p && git merge --no-ff 1_q -m 1_E && + git checkout -b 1_r @~3 && test_commit 1_F && + git checkout 1_p && git merge --no-ff 1_r -m 1_G && + git checkout @^^ && git merge --no-ff 1_p -m 1_H && + + git log --graph --pretty=tformat:%s | sed "s/ *$//" >actual && + test_cmp expect actual +' + +test_expect_success 'log --graph with nested left-skewed merge following normal merge' ' + cat >expect <<-\EOF && + * 2_K + |\ + | * 2_J + | |\ + | | * 2_H + | | |\ + | | * | 2_G + | |/| | + | | * | 2_F + | * | | 2_E + | |/ / + | * | 2_D + * | | 2_C + | |/ + |/| + * | 2_B + |/ + * 2_A + EOF + + git checkout --orphan 2_p && + test_commit 2_A && + test_commit 2_B && + test_commit 2_C && + git checkout -b 2_q @^^ && + test_commit 2_D && + test_commit 2_E && + git checkout -b 2_r @^ && test_commit 2_F && + git checkout 2_q && + git merge --no-ff 2_r -m 2_G && + git merge --no-ff 2_p^ -m 2_H && + git checkout -b 2_s @^^ && git merge --no-ff 2_q -m 2_J && + git checkout 2_p && git merge --no-ff 2_s -m 2_K && + + git log --graph --pretty=tformat:%s | sed "s/ *$//" >actual && + test_cmp expect actual +' + +test_expect_success 'log --graph with nested right-skewed merge following left-skewed merge' ' + cat >expect <<-\EOF && + * 3_J + |\ + | * 3_H + | |\ + | | * 3_G + | * | 3_F + |/| | + | * | 3_E + | |\ \ + | | |/ + | | * 3_D + | * | 3_C + | |/ + | * 3_B + |/ + * 3_A + EOF + + git checkout --orphan 3_p && + test_commit 3_A && + git checkout -b 3_q && + test_commit 3_B && + test_commit 3_C && + git checkout -b 3_r @^ && + test_commit 3_D && + git checkout 3_q && git merge --no-ff 3_r -m 3_E && + git checkout 3_p && git merge --no-ff 3_q -m 3_F && + git checkout 3_r && test_commit 3_G && + git checkout 3_p && git merge --no-ff 3_r -m 3_H && + git checkout @^^ && git merge --no-ff 3_p -m 3_J && + + git log --graph --pretty=tformat:%s | sed "s/ *$//" >actual && + test_cmp expect actual +' + +test_expect_success 'log --graph with right-skewed merge following a left-skewed one' ' + cat >expect <<-\EOF && + * 4_H + |\ + | * 4_G + | |\ + | * | 4_F + |/| | + | * | 4_E + | |\ \ + | | * | 4_D + | |/ / + |/| | + | | * 4_C + | |/ + | * 4_B + |/ + * 4_A + EOF + + git checkout --orphan 4_p && + test_commit 4_A && + test_commit 4_B && + test_commit 4_C && + git checkout -b 4_q @^^ && test_commit 4_D && + git checkout -b 4_r 4_p^ && git merge --no-ff 4_q -m 4_E && + git checkout -b 4_s 4_p^^ && + git merge --no-ff 4_r -m 4_F && + git merge --no-ff 4_p -m 4_G && + git checkout @^^ && git merge --no-ff 4_s -m 4_H && + + git log --graph --date-order --pretty=tformat:%s | sed "s/ *$//" >actual && + test_cmp expect actual +' + test_done |