apply.c:update_pre_post_images(): the preimage can be truncated

diff --git a/builtin/diff.c b/builtin/diff.c
index 0fe638fc45c780e53901b8be22d3b4d715be3c30..9650be2c50e6f79dbe033fae39f490d49c6318da 100644 (file)
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -14,6 +14,7 @@
 #include "log-tree.h"
 #include "builtin.h"
 #include "submodule.h"
+#include "sha1-array.h"
 
 struct blobinfo {
        unsigned char sha1[20];
@@ -28,6 +29,8 @@ static void stuff_change(struct diff_options *opt,
                         unsigned old_mode, unsigned new_mode,
                         const unsigned char *old_sha1,
                         const unsigned char *new_sha1,
+                        int old_sha1_valid,
+                        int new_sha1_valid,
                         const char *old_name,
                         const char *new_name)
 {
@@ -53,8 +56,8 @@ static void stuff_change(struct diff_options *opt,
 
        one = alloc_filespec(old_name);
        two = alloc_filespec(new_name);
-       fill_filespec(one, old_sha1, old_mode);
-       fill_filespec(two, new_sha1, new_mode);
+       fill_filespec(one, old_sha1, old_sha1_valid, old_mode);
+       fill_filespec(two, new_sha1, new_sha1_valid, new_mode);
 
        diff_queue(&diff_queued_diff, one, two);
 }
@@ -83,6 +86,7 @@ static int builtin_diff_b_f(struct rev_info *revs,
        stuff_change(&revs->diffopt,
                     blob[0].mode, canon_mode(st.st_mode),
                     blob[0].sha1, null_sha1,
+                    1, 0,
                     path, path);
        diffcore_std(&revs->diffopt);
        diff_flush(&revs->diffopt);
@@ -107,6 +111,7 @@ static int builtin_diff_blobs(struct rev_info *revs,
        stuff_change(&revs->diffopt,
                     blob[0].mode, blob[1].mode,
                     blob[0].sha1, blob[1].sha1,
+                    1, 1,
                     blob[0].name, blob[1].name);
        diffcore_std(&revs->diffopt);
        diff_flush(&revs->diffopt);
@@ -169,7 +174,7 @@ static int builtin_diff_combined(struct rev_info *revs,
                                 struct object_array_entry *ent,
                                 int ents)
 {
-       const unsigned char (*parent)[20];
+       struct sha1_array parents = SHA1_ARRAY_INIT;
        int i;
 
        if (argc > 1)
@@ -177,12 +182,11 @@ static int builtin_diff_combined(struct rev_info *revs,
 
        if (!revs->dense_combined_merges && !revs->combine_merges)
                revs->dense_combined_merges = revs->combine_merges = 1;
-       parent = xmalloc(ents * sizeof(*parent));
-       for (i = 0; i < ents; i++)
-               hashcpy((unsigned char *)(parent + i), ent[i].item->sha1);
-       diff_tree_combined(parent[0], parent + 1, ents - 1,
+       for (i = 1; i < ents; i++)
+               sha1_array_append(&parents, ent[i].item->sha1);
+       diff_tree_combined(ent[0].item->sha1, &parents,
                           revs->dense_combined_merges, revs);
-       free((void *)parent);
+       sha1_array_clear(&parents);
        return 0;
 }
 
@@ -285,6 +289,10 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
        /* Otherwise, we are doing the usual "git" diff */
        rev.diffopt.skip_stat_unmatch = !!diff_auto_refresh_index;
 
+       /* Scale to real terminal size and respect statGraphWidth config */
+       rev.diffopt.stat_width = -1;
+       rev.diffopt.stat_graph_width = -1;
+
        /* Default to let external and textconv be used */
        DIFF_OPT_SET(&rev.diffopt, ALLOW_EXTERNAL);
        DIFF_OPT_SET(&rev.diffopt, ALLOW_TEXTCONV);
@@ -294,19 +302,12 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
        argc = setup_revisions(argc, argv, &rev, NULL);
        if (!rev.diffopt.output_format) {
                rev.diffopt.output_format = DIFF_FORMAT_PATCH;
-               if (diff_setup_done(&rev.diffopt) < 0)
-                       die(_("diff_setup_done failed"));
+               diff_setup_done(&rev.diffopt);
        }
 
        DIFF_OPT_SET(&rev.diffopt, RECURSIVE);
 
-       /*
-        * If the user asked for our exit code then don't start a
-        * pager or we would end up reporting its exit code instead.
-        */
-       if (!DIFF_OPT_TST(&rev.diffopt, EXIT_WITH_STATUS) &&
-           check_pager_config("diff") != 0)
-               setup_pager();
+       setup_diff_pager(&rev.diffopt);
 
        /*
         * Do we have --cached and not have a pending object, then
@@ -323,7 +324,7 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
                                add_head_to_pending(&rev);
                                if (!rev.pending.nr) {
                                        struct tree *tree;
-                                       tree = lookup_tree((const unsigned char*)EMPTY_TREE_SHA1_BIN);
+                                       tree = lookup_tree(EMPTY_TREE_SHA1_BIN);
                                        add_pending_object(&rev, &tree->object, "HEAD");
                                }
                                break;
@@ -417,3 +418,19 @@ int cmd_diff(int argc, const char **argv, const char *prefix)
                refresh_index_quietly();
        return result;
 }
+
+void setup_diff_pager(struct diff_options *opt)
+{
+       /*
+        * If the user asked for our exit code, then either they want --quiet
+        * or --exit-code. We should definitely not bother with a pager in the
+        * former case, as we will generate no output. Since we still properly
+        * report our exit code even when a pager is run, we _could_ run a
+        * pager with --exit-code. But since we have not done so historically,
+        * and because it is easy to find people oneline advising "git diff
+        * --exit-code" in hooks and other scripts, we do not do so.
+        */
+       if (!DIFF_OPT_TST(opt, EXIT_WITH_STATUS) &&
+           check_pager_config("diff") != 0)
+               setup_pager();
+}