merge-recursive: get rid of the index_only global variable

struct merge_options already has a call_depth member, and index_only
global variable always equals to !!call_depth.

We always use index_only as a condition, so we can just
use call_depth instead of index_only.

Signed-off-by: Miklos Vajna <vmiklos@frugalware.org>

diff --git a/merge-recursive.c b/merge-recursive.c
index 5bb20aa..c426589 100644 (file)
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -165,17 +165,6 @@ static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
        return add_cache_entry(ce, options);
 }
 
-/*
- * This is a global variable which is used in a number of places but
- * only written to in the 'merge' function.
- *
- * index_only == 1    => Don't leave any non-stage 0 entries in the cache and
- *                       don't update the working directory.
- *               0    => Leave unmerged entries in the cache and update
- *                       the working directory.
- */
-static int index_only = 0;
-
 static void init_tree_desc_from_tree(struct tree_desc *desc, struct tree *tree)
 {
        parse_tree(tree);
@@ -428,10 +417,11 @@ static int remove_path(const char *name)
        return ret;
 }
 
-static int remove_file(int clean, const char *path, int no_wd)
+static int remove_file(struct merge_options *o, int clean,
+                      const char *path, int no_wd)
 {
-       int update_cache = index_only || clean;
-       int update_working_directory = !index_only && !no_wd;
+       int update_cache = o->call_depth || clean;
+       int update_working_directory = !o->call_depth && !no_wd;
 
        if (update_cache) {
                if (remove_file_from_cache(path))
@@ -509,13 +499,14 @@ static int make_room_for_path(const char *path)
        return error(msg, path, ": perhaps a D/F conflict?");
 }
 
-static void update_file_flags(const unsigned char *sha,
+static void update_file_flags(struct merge_options *o,
+                             const unsigned char *sha,
                              unsigned mode,
                              const char *path,
                              int update_cache,
                              int update_wd)
 {
-       if (index_only)
+       if (o->call_depth)
                update_wd = 0;
 
        if (update_wd) {
@@ -574,12 +565,13 @@ static void update_file_flags(const unsigned char *sha,
                add_cacheinfo(mode, sha, path, 0, update_wd, ADD_CACHE_OK_TO_ADD);
 }
 
-static void update_file(int clean,
+static void update_file(struct merge_options *o,
+                       int clean,
                        const unsigned char *sha,
                        unsigned mode,
                        const char *path)
 {
-       update_file_flags(sha, mode, path, index_only || clean, !index_only);
+       update_file_flags(o, sha, mode, path, o->call_depth || clean, !o->call_depth);
 }
 
 /* Low level file merging, update and removal */
@@ -609,8 +601,9 @@ static void fill_mm(const unsigned char *sha1, mmfile_t *mm)
        mm->size = size;
 }
 
-static int merge_3way(mmbuffer_t *result_buf,
-                     struct diff_filespec *o,
+static int merge_3way(struct merge_options *o,
+                     mmbuffer_t *result_buf,
+                     struct diff_filespec *one,
                      struct diff_filespec *a,
                      struct diff_filespec *b,
                      const char *branch1,
@@ -623,13 +616,13 @@ static int merge_3way(mmbuffer_t *result_buf,
        name1 = xstrdup(mkpath("%s:%s", branch1, a->path));
        name2 = xstrdup(mkpath("%s:%s", branch2, b->path));
 
-       fill_mm(o->sha1, &orig);
+       fill_mm(one->sha1, &orig);
        fill_mm(a->sha1, &src1);
        fill_mm(b->sha1, &src2);
 
        merge_status = ll_merge(result_buf, a->path, &orig,
                                &src1, name1, &src2, name2,
-                               index_only);
+                               o->call_depth);
 
        free(name1);
        free(name2);
@@ -639,9 +632,12 @@ static int merge_3way(mmbuffer_t *result_buf,
        return merge_status;
 }
 
-static struct merge_file_info merge_file(struct diff_filespec *o,
-               struct diff_filespec *a, struct diff_filespec *b,
-               const char *branch1, const char *branch2)
+static struct merge_file_info merge_file(struct merge_options *o,
+                                        struct diff_filespec *one,
+                                        struct diff_filespec *a,
+                                        struct diff_filespec *b,
+                                        const char *branch1,
+                                        const char *branch2)
 {
        struct merge_file_info result;
        result.merge = 0;
@@ -657,31 +653,31 @@ static struct merge_file_info merge_file(struct diff_filespec *o,
                        hashcpy(result.sha, b->sha1);
                }
        } else {
-               if (!sha_eq(a->sha1, o->sha1) && !sha_eq(b->sha1, o->sha1))
+               if (!sha_eq(a->sha1, one->sha1) && !sha_eq(b->sha1, one->sha1))
                        result.merge = 1;
 
                /*
                 * Merge modes
                 */
-               if (a->mode == b->mode || a->mode == o->mode)
+               if (a->mode == b->mode || a->mode == one->mode)
                        result.mode = b->mode;
                else {
                        result.mode = a->mode;
-                       if (b->mode != o->mode) {
+                       if (b->mode != one->mode) {
                                result.clean = 0;
                                result.merge = 1;
                        }
                }
 
-               if (sha_eq(a->sha1, b->sha1) || sha_eq(a->sha1, o->sha1))
+               if (sha_eq(a->sha1, b->sha1) || sha_eq(a->sha1, one->sha1))
                        hashcpy(result.sha, b->sha1);
-               else if (sha_eq(b->sha1, o->sha1))
+               else if (sha_eq(b->sha1, one->sha1))
                        hashcpy(result.sha, a->sha1);
                else if (S_ISREG(a->mode)) {
                        mmbuffer_t result_buf;
                        int merge_status;
 
-                       merge_status = merge_3way(&result_buf, o, a, b,
+                       merge_status = merge_3way(o, &result_buf, one, a, b,
                                                  branch1, branch2);
 
                        if ((merge_status < 0) || !result_buf.ptr)
@@ -726,22 +722,22 @@ static void conflict_rename_rename(struct merge_options *o,
                dst_name1 = del[delp++] = unique_path(ren1_dst, branch1);
                output(o, 1, "%s is a directory in %s adding as %s instead",
                       ren1_dst, branch2, dst_name1);
-               remove_file(0, ren1_dst, 0);
+               remove_file(o, 0, ren1_dst, 0);
        }
        if (string_list_has_string(&current_directory_set, ren2_dst)) {
                dst_name2 = del[delp++] = unique_path(ren2_dst, branch2);
                output(o, 1, "%s is a directory in %s adding as %s instead",
                       ren2_dst, branch1, dst_name2);
-               remove_file(0, ren2_dst, 0);
+               remove_file(o, 0, ren2_dst, 0);
        }
-       if (index_only) {
+       if (o->call_depth) {
                remove_file_from_cache(dst_name1);
                remove_file_from_cache(dst_name2);
                /*
                 * Uncomment to leave the conflicting names in the resulting tree
                 *
-                * update_file(0, ren1->pair->two->sha1, ren1->pair->two->mode, dst_name1);
-                * update_file(0, ren2->pair->two->sha1, ren2->pair->two->mode, dst_name2);
+                * update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, dst_name1);
+                * update_file(o, 0, ren2->pair->two->sha1, ren2->pair->two->mode, dst_name2);
                 */
        } else {
                update_stages(dst_name1, NULL, ren1->pair->two, NULL, 1);
@@ -757,8 +753,8 @@ static void conflict_rename_dir(struct merge_options *o,
 {
        char *new_path = unique_path(ren1->pair->two->path, branch1);
        output(o, 1, "Renaming %s to %s instead", ren1->pair->one->path, new_path);
-       remove_file(0, ren1->pair->two->path, 0);
-       update_file(0, ren1->pair->two->sha1, ren1->pair->two->mode, new_path);
+       remove_file(o, 0, ren1->pair->two->path, 0);
+       update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, new_path);
        free(new_path);
 }
 
@@ -773,9 +769,9 @@ static void conflict_rename_rename_2(struct merge_options *o,
        output(o, 1, "Renaming %s to %s and %s to %s instead",
               ren1->pair->one->path, new_path1,
               ren2->pair->one->path, new_path2);
-       remove_file(0, ren1->pair->two->path, 0);
-       update_file(0, ren1->pair->two->sha1, ren1->pair->two->mode, new_path1);
-       update_file(0, ren2->pair->two->sha1, ren2->pair->two->mode, new_path2);
+       remove_file(o, 0, ren1->pair->two->path, 0);
+       update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, new_path1);
+       update_file(o, 0, ren2->pair->two->sha1, ren2->pair->two->mode, new_path2);
        free(new_path2);
        free(new_path1);
 }
@@ -867,17 +863,18 @@ static int process_renames(struct merge_options *o,
                                       "rename \"%s\"->\"%s\" in \"%s\"%s",
                                       src, ren1_dst, branch1,
                                       src, ren2_dst, branch2,
-                                      index_only ? " (left unresolved)": "");
-                               if (index_only) {
+                                      o->call_depth ? " (left unresolved)": "");
+                               if (o->call_depth) {
                                        remove_file_from_cache(src);
-                                       update_file(0, ren1->pair->one->sha1,
+                                       update_file(o, 0, ren1->pair->one->sha1,
                                                    ren1->pair->one->mode, src);
                                }
                                conflict_rename_rename(o, ren1, branch1, ren2, branch2);
                        } else {
                                struct merge_file_info mfi;
-                               remove_file(1, ren1_src, 1);
-                               mfi = merge_file(ren1->pair->one,
+                               remove_file(o, 1, ren1_src, 1);
+                               mfi = merge_file(o,
+                                                ren1->pair->one,
                                                 ren1->pair->two,
                                                 ren2->pair->two,
                                                 branch1,
@@ -893,14 +890,14 @@ static int process_renames(struct merge_options *o,
                                               ren1_dst);
                                        clean_merge = 0;
 
-                                       if (!index_only)
+                                       if (!o->call_depth)
                                                update_stages(ren1_dst,
                                                              ren1->pair->one,
                                                              ren1->pair->two,
                                                              ren2->pair->two,
                                                              1 /* clear */);
                                }
-                               update_file(mfi.clean, mfi.sha, mfi.mode, ren1_dst);
+                               update_file(o, mfi.clean, mfi.sha, mfi.mode, ren1_dst);
                        }
                } else {
                        /* Renamed in 1, maybe changed in 2 */
@@ -909,7 +906,7 @@ static int process_renames(struct merge_options *o,
                        struct diff_filespec src_other, dst_other;
                        int try_merge, stage = a_renames == renames1 ? 3: 2;
 
-                       remove_file(1, ren1_src, index_only || stage == 3);
+                       remove_file(o, 1, ren1_src, o->call_depth || stage == 3);
 
                        hashcpy(src_other.sha1, ren1->src_entry->stages[stage].sha);
                        src_other.mode = ren1->src_entry->stages[stage].mode;
@@ -931,7 +928,7 @@ static int process_renames(struct merge_options *o,
                                       "and deleted in %s",
                                       ren1_src, ren1_dst, branch1,
                                       branch2);
-                               update_file(0, ren1->pair->two->sha1, ren1->pair->two->mode, ren1_dst);
+                               update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, ren1_dst);
                        } else if (!sha_eq(dst_other.sha1, null_sha1)) {
                                const char *new_path;
                                clean_merge = 0;
@@ -942,7 +939,7 @@ static int process_renames(struct merge_options *o,
                                       ren1_dst, branch2);
                                new_path = unique_path(ren1_dst, branch2);
                                output(o, 1, "Adding as %s instead", new_path);
-                               update_file(0, dst_other.sha1, dst_other.mode, new_path);
+                               update_file(o, 0, dst_other.sha1, dst_other.mode, new_path);
                        } else if ((item = string_list_lookup(ren1_dst, renames2Dst))) {
                                ren2 = item->util;
                                clean_merge = 0;
@@ -969,7 +966,7 @@ static int process_renames(struct merge_options *o,
                                        b = ren1->pair->two;
                                        a = &src_other;
                                }
-                               mfi = merge_file(one, a, b,
+                               mfi = merge_file(o, one, a, b,
                                                o->branch1, o->branch2);
 
                                if (mfi.clean &&
@@ -991,11 +988,11 @@ static int process_renames(struct merge_options *o,
                                                       ren1_dst);
                                                clean_merge = 0;
 
-                                               if (!index_only)
+                                               if (!o->call_depth)
                                                        update_stages(ren1_dst,
                                                                      one, a, b, 1);
                                        }
-                                       update_file(mfi.clean, mfi.sha, mfi.mode, ren1_dst);
+                                       update_file(o, mfi.clean, mfi.sha, mfi.mode, ren1_dst);
                                }
                        }
                }
@@ -1037,7 +1034,7 @@ static int process_entry(struct merge_options *o,
                        if (a_sha)
                                output(o, 2, "Removing %s", path);
                        /* do not touch working file if it did not exist */
-                       remove_file(1, path, !a_sha);
+                       remove_file(o, 1, path, !a_sha);
                } else {
                        /* Deleted in one and changed in the other */
                        clean_merge = 0;
@@ -1046,13 +1043,13 @@ static int process_entry(struct merge_options *o,
                                       "and modified in %s. Version %s of %s left in tree.",
                                       path, o->branch1,
                                       o->branch2, o->branch2, path);
-                               update_file(0, b_sha, b_mode, path);
+                               update_file(o, 0, b_sha, b_mode, path);
                        } else {
                                output(o, 1, "CONFLICT (delete/modify): %s deleted in %s "
                                       "and modified in %s. Version %s of %s left in tree.",
                                       path, o->branch2,
                                       o->branch1, o->branch1, path);
-                               update_file(0, a_sha, a_mode, path);
+                               update_file(o, 0, a_sha, a_mode, path);
                        }
                }
 
@@ -1084,11 +1081,11 @@ static int process_entry(struct merge_options *o,
                        output(o, 1, "CONFLICT (%s): There is a directory with name %s in %s. "
                               "Adding %s as %s",
                               conf, path, other_branch, path, new_path);
-                       remove_file(0, path, 0);
-                       update_file(0, sha, mode, new_path);
+                       remove_file(o, 0, path, 0);
+                       update_file(o, 0, sha, mode, new_path);
                } else {
                        output(o, 2, "Adding %s", path);
-                       update_file(1, sha, mode, path);
+                       update_file(o, 1, sha, mode, path);
                }
        } else if (a_sha && b_sha) {
                /* Case C: Added in both (check for same permissions) and */
@@ -1110,12 +1107,12 @@ static int process_entry(struct merge_options *o,
                hashcpy(b.sha1, b_sha);
                b.mode = b_mode;
 
-               mfi = merge_file(&one, &a, &b,
+               mfi = merge_file(o, &one, &a, &b,
                                 o->branch1, o->branch2);
 
                clean_merge = mfi.clean;
                if (mfi.clean)
-                       update_file(1, mfi.sha, mfi.mode, path);
+                       update_file(o, 1, mfi.sha, mfi.mode, path);
                else if (S_ISGITLINK(mfi.mode))
                        output(o, 1, "CONFLICT (submodule): Merge conflict in %s "
                               "- needs %s", path, sha1_to_hex(b.sha1));
@@ -1123,10 +1120,10 @@ static int process_entry(struct merge_options *o,
                        output(o, 1, "CONFLICT (%s): Merge conflict in %s",
                                        reason, path);
 
-                       if (index_only)
-                               update_file(0, mfi.sha, mfi.mode, path);
+                       if (o->call_depth)
+                               update_file(o, 0, mfi.sha, mfi.mode, path);
                        else
-                               update_file_flags(mfi.sha, mfi.mode, path,
+                               update_file_flags(o, mfi.sha, mfi.mode, path,
                                              0 /* update_cache */, 1 /* update_working_directory */);
                }
        } else if (!o_sha && !a_sha && !b_sha) {
@@ -1134,7 +1131,7 @@ static int process_entry(struct merge_options *o,
                 * this entry was deleted altogether. a_mode == 0 means
                 * we had that path and want to actively remove it.
                 */
-               remove_file(1, path, !a_mode);
+               remove_file(o, 1, path, !a_mode);
        } else
                die("Fatal merge failure, shouldn't happen.");
 
@@ -1160,7 +1157,7 @@ int merge_trees(struct merge_options *o,
                return 1;
        }
 
-       code = git_merge_trees(index_only, common, head, merge);
+       code = git_merge_trees(o->call_depth, common, head, merge);
 
        if (code != 0)
                die("merging of trees %s and %s failed",
@@ -1195,7 +1192,7 @@ int merge_trees(struct merge_options *o,
        else
                clean = 1;
 
-       if (index_only)
+       if (o->call_depth)
                *result = write_tree_from_memory(o);
 
        return clean;
@@ -1281,16 +1278,13 @@ int merge_recursive(struct merge_options *o,
        }
 
        discard_cache();
-       if (!o->call_depth) {
+       if (!o->call_depth)
                read_cache();
-               index_only = 0;
-       } else
-               index_only = 1;
 
        clean = merge_trees(o, h1->tree, h2->tree, merged_common_ancestors->tree,
                            &mrtree);
 
-       if (index_only) {
+       if (o->call_depth) {
                *result = make_virtual_commit(mrtree, "merged tree");
                commit_list_insert(h1, &(*result)->parents);
                commit_list_insert(h2, &(*result)->parents->next);