]> asedeno.scripts.mit.edu Git - git.git/blobdiff - diff-lib.c
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[git.git] / diff-lib.c
index ae96c64ca209f4df9008198e8a04b160bed618c7..d7e13cb177a3c345eb076a9ffede87c6e6afa367 100644 (file)
@@ -10,6 +10,7 @@
 #include "cache-tree.h"
 #include "unpack-trees.h"
 #include "refs.h"
+#include "submodule.h"
 
 /*
  * diff-files
@@ -31,7 +32,7 @@ static int check_removed(const struct cache_entry *ce, struct stat *st)
                        return -1;
                return 1;
        }
-       if (has_symlink_leading_path(ce_namelen(ce), ce->name))
+       if (has_symlink_leading_path(ce->name, ce_namelen(ce)))
                return 1;
        if (S_ISDIR(st->st_mode)) {
                unsigned char sub[20];
@@ -61,21 +62,20 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
        int silent_on_removed = option & DIFF_SILENT_ON_REMOVED;
        unsigned ce_option = ((option & DIFF_RACY_IS_MODIFIED)
                              ? CE_MATCH_RACY_IS_DIRTY : 0);
-       char symcache[PATH_MAX];
 
        diff_set_mnemonic_prefix(&revs->diffopt, "i/", "w/");
 
        if (diff_unmerged_stage < 0)
                diff_unmerged_stage = 2;
        entries = active_nr;
-       symcache[0] = '\0';
        for (i = 0; i < entries; i++) {
                struct stat st;
                unsigned int oldmode, newmode;
                struct cache_entry *ce = active_cache[i];
                int changed;
+               unsigned dirty_submodule = 0;
 
-               if (DIFF_OPT_TST(&revs->diffopt, QUIET) &&
+               if (DIFF_OPT_TST(&revs->diffopt, QUICK) &&
                        DIFF_OPT_TST(&revs->diffopt, HAS_CHANGES))
                        break;
 
@@ -161,10 +161,11 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                                continue;
                }
 
-               if (ce_uptodate(ce))
+               if (ce_uptodate(ce) || ce_skip_worktree(ce))
                        continue;
 
-               changed = check_removed(ce, &st);
+               /* If CE_VALID is set, don't look at workdir for file removal */
+               changed = (ce->ce_flags & CE_VALID) ? 0 : check_removed(ce, &st);
                if (changed) {
                        if (changed < 0) {
                                perror(ce->name);
@@ -173,10 +174,17 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                        if (silent_on_removed)
                                continue;
                        diff_addremove(&revs->diffopt, '-', ce->ce_mode,
-                                      ce->sha1, ce->name);
+                                      ce->sha1, ce->name, 0);
                        continue;
                }
                changed = ce_match_stat(ce, &st, ce_option);
+               if (S_ISGITLINK(ce->ce_mode)
+                   && !DIFF_OPT_TST(&revs->diffopt, IGNORE_SUBMODULES)
+                   && (!changed || (revs->diffopt.output_format & DIFF_FORMAT_PATCH))
+                   && is_submodule_modified(ce->name)) {
+                       changed = 1;
+                       dirty_submodule = 1;
+               }
                if (!changed) {
                        ce_mark_uptodate(ce);
                        if (!DIFF_OPT_TST(&revs->diffopt, FIND_COPIES_HARDER))
@@ -186,7 +194,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                newmode = ce_mode_from_stat(ce, st.st_mode);
                diff_change(&revs->diffopt, oldmode, newmode,
                            ce->sha1, (changed ? null_sha1 : ce->sha1),
-                           ce->name);
+                           ce->name, 0, dirty_submodule);
 
        }
        diffcore_std(&revs->diffopt);
@@ -198,31 +206,27 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
  * diff-index
  */
 
-struct oneway_unpack_data {
-       struct rev_info *revs;
-       char symcache[PATH_MAX];
-};
-
 /* A file entry went away or appeared */
 static void diff_index_show_file(struct rev_info *revs,
                                 const char *prefix,
                                 struct cache_entry *ce,
-                                const unsigned char *sha1, unsigned int mode)
+                                const unsigned char *sha1, unsigned int mode,
+                                unsigned dirty_submodule)
 {
        diff_addremove(&revs->diffopt, prefix[0], mode,
-                      sha1, ce->name);
+                      sha1, ce->name, dirty_submodule);
 }
 
 static int get_stat_data(struct cache_entry *ce,
                         const unsigned char **sha1p,
                         unsigned int *modep,
                         int cached, int match_missing,
-                        struct oneway_unpack_data *cbdata)
+                        unsigned *dirty_submodule, struct diff_options *diffopt)
 {
        const unsigned char *sha1 = ce->sha1;
        unsigned int mode = ce->ce_mode;
 
-       if (!cached) {
+       if (!cached && !ce_uptodate(ce)) {
                int changed;
                struct stat st;
                changed = check_removed(ce, &st);
@@ -237,6 +241,13 @@ static int get_stat_data(struct cache_entry *ce,
                        return -1;
                }
                changed = ce_match_stat(ce, &st, 0);
+               if (S_ISGITLINK(ce->ce_mode)
+                   && !DIFF_OPT_TST(diffopt, IGNORE_SUBMODULES)
+                   && (!changed || (diffopt->output_format & DIFF_FORMAT_PATCH))
+                   && is_submodule_modified(ce->name)) {
+                       changed = 1;
+                       *dirty_submodule = 1;
+               }
                if (changed) {
                        mode = ce_mode_from_stat(ce, st.st_mode);
                        sha1 = null_sha1;
@@ -248,25 +259,26 @@ static int get_stat_data(struct cache_entry *ce,
        return 0;
 }
 
-static void show_new_file(struct oneway_unpack_data *cbdata,
+static void show_new_file(struct rev_info *revs,
                          struct cache_entry *new,
                          int cached, int match_missing)
 {
        const unsigned char *sha1;
        unsigned int mode;
-       struct rev_info *revs = cbdata->revs;
+       unsigned dirty_submodule = 0;
 
        /*
         * New file in the index: it might actually be different in
         * the working copy.
         */
-       if (get_stat_data(new, &sha1, &mode, cached, match_missing, cbdata) < 0)
+       if (get_stat_data(new, &sha1, &mode, cached, match_missing,
+           &dirty_submodule, &revs->diffopt) < 0)
                return;
 
-       diff_index_show_file(revs, "+", new, sha1, mode);
+       diff_index_show_file(revs, "+", new, sha1, mode, dirty_submodule);
 }
 
-static int show_modified(struct oneway_unpack_data *cbdata,
+static int show_modified(struct rev_info *revs,
                         struct cache_entry *old,
                         struct cache_entry *new,
                         int report_missing,
@@ -274,12 +286,13 @@ static int show_modified(struct oneway_unpack_data *cbdata,
 {
        unsigned int mode, oldmode;
        const unsigned char *sha1;
-       struct rev_info *revs = cbdata->revs;
+       unsigned dirty_submodule = 0;
 
-       if (get_stat_data(new, &sha1, &mode, cached, match_missing, cbdata) < 0) {
+       if (get_stat_data(new, &sha1, &mode, cached, match_missing,
+                         &dirty_submodule, &revs->diffopt) < 0) {
                if (report_missing)
                        diff_index_show_file(revs, "-", old,
-                                            old->sha1, old->ce_mode);
+                                            old->sha1, old->ce_mode, 0);
                return -1;
        }
 
@@ -314,26 +327,10 @@ static int show_modified(struct oneway_unpack_data *cbdata,
                return 0;
 
        diff_change(&revs->diffopt, oldmode, mode,
-                   old->sha1, sha1, old->name);
+                   old->sha1, sha1, old->name, 0, dirty_submodule);
        return 0;
 }
 
-/*
- * This turns all merge entries into "stage 3". That guarantees that
- * when we read in the new tree (into "stage 1"), we won't lose sight
- * of the fact that we had unmerged entries.
- */
-static void mark_merge_entries(void)
-{
-       int i;
-       for (i = 0; i < active_nr; i++) {
-               struct cache_entry *ce = active_cache[i];
-               if (!ce_stage(ce))
-                       continue;
-               ce->ce_flags |= CE_STAGEMASK;
-       }
-}
-
 /*
  * This gets a mix of an existing index and a tree, one pathname entry
  * at a time. The index entry may be a single stage-0 one, but it could
@@ -344,10 +341,12 @@ static void do_oneway_diff(struct unpack_trees_options *o,
        struct cache_entry *idx,
        struct cache_entry *tree)
 {
-       struct oneway_unpack_data *cbdata = o->unpack_data;
-       struct rev_info *revs = cbdata->revs;
+       struct rev_info *revs = o->unpack_data;
        int match_missing, cached;
 
+       /* if the entry is not checked out, don't examine work tree */
+       cached = o->index_only ||
+               (idx && ((idx->ce_flags & CE_VALID) || ce_skip_worktree(idx)));
        /*
         * Backward compatibility wart - "diff-index -m" does
         * not mean "do not ignore merges", but "match_missing".
@@ -355,12 +354,11 @@ static void do_oneway_diff(struct unpack_trees_options *o,
         * But with the revision flag parsing, that's found in
         * "!revs->ignore_merges".
         */
-       cached = o->index_only;
        match_missing = !revs->ignore_merges;
 
        if (cached && idx && ce_stage(idx)) {
-               if (tree)
-                       diff_unmerge(&revs->diffopt, idx->name, idx->ce_mode, idx->sha1);
+               diff_unmerge(&revs->diffopt, idx->name, idx->ce_mode,
+                            idx->sha1);
                return;
        }
 
@@ -368,7 +366,7 @@ static void do_oneway_diff(struct unpack_trees_options *o,
         * Something added to the tree?
         */
        if (!tree) {
-               show_new_file(cbdata, idx, cached, match_missing);
+               show_new_file(revs, idx, cached, match_missing);
                return;
        }
 
@@ -376,27 +374,12 @@ static void do_oneway_diff(struct unpack_trees_options *o,
         * Something removed from the tree?
         */
        if (!idx) {
-               diff_index_show_file(revs, "-", tree, tree->sha1, tree->ce_mode);
+               diff_index_show_file(revs, "-", tree, tree->sha1, tree->ce_mode, 0);
                return;
        }
 
        /* Show difference between old and new */
-       show_modified(cbdata, tree, idx, 1, cached, match_missing);
-}
-
-static inline void skip_same_name(struct cache_entry *ce, struct unpack_trees_options *o)
-{
-       int len = ce_namelen(ce);
-       const struct index_state *index = o->src_index;
-
-       while (o->pos < index->cache_nr) {
-               struct cache_entry *next = index->cache[o->pos];
-               if (len != ce_namelen(next))
-                       break;
-               if (memcmp(ce->name, next->name, len))
-                       break;
-               o->pos++;
-       }
+       show_modified(revs, tree, idx, 1, cached, match_missing);
 }
 
 /*
@@ -408,7 +391,7 @@ static inline void skip_same_name(struct cache_entry *ce, struct unpack_trees_op
  * For diffing, the index is more important, and we only have a
  * single tree.
  *
- * We're supposed to return how many index entries we want to skip.
+ * We're supposed to advance o->pos to skip what we have already processed.
  *
  * This wrapper makes it all more readable, and takes care of all
  * the fairly complex unpack_trees() semantic requirements, including
@@ -418,11 +401,7 @@ static int oneway_diff(struct cache_entry **src, struct unpack_trees_options *o)
 {
        struct cache_entry *idx = src[0];
        struct cache_entry *tree = src[1];
-       struct oneway_unpack_data *cbdata = o->unpack_data;
-       struct rev_info *revs = cbdata->revs;
-
-       if (idx && ce_stage(idx))
-               skip_same_name(idx, o);
+       struct rev_info *revs = o->unpack_data;
 
        /*
         * Unpack-trees generates a DF/conflict entry if
@@ -446,9 +425,6 @@ int run_diff_index(struct rev_info *revs, int cached)
        const char *tree_name;
        struct unpack_trees_options opts;
        struct tree_desc t;
-       struct oneway_unpack_data unpack_cb;
-
-       mark_merge_entries();
 
        ent = revs->pending.objects[0].item;
        tree_name = revs->pending.objects[0].name;
@@ -456,14 +432,14 @@ int run_diff_index(struct rev_info *revs, int cached)
        if (!tree)
                return error("bad tree object %s", tree_name);
 
-       unpack_cb.revs = revs;
-       unpack_cb.symcache[0] = '\0';
        memset(&opts, 0, sizeof(opts));
        opts.head_idx = 1;
        opts.index_only = cached;
+       opts.diff_index_cached = (cached &&
+                                 !DIFF_OPT_TST(&revs->diffopt, FIND_COPIES_HARDER));
        opts.merge = 1;
        opts.fn = oneway_diff;
-       opts.unpack_data = &unpack_cb;
+       opts.unpack_data = revs;
        opts.src_index = &the_index;
        opts.dst_index = NULL;
 
@@ -472,6 +448,7 @@ int run_diff_index(struct rev_info *revs, int cached)
                exit(128);
 
        diff_set_mnemonic_prefix(&revs->diffopt, "c/", cached ? "i/" : "w/");
+       diffcore_fix_diff_index(&revs->diffopt);
        diffcore_std(&revs->diffopt);
        diff_flush(&revs->diffopt);
        return 0;
@@ -486,7 +463,6 @@ int do_diff_cache(const unsigned char *tree_sha1, struct diff_options *opt)
        struct cache_entry *last = NULL;
        struct unpack_trees_options opts;
        struct tree_desc t;
-       struct oneway_unpack_data unpack_cb;
 
        /*
         * This is used by git-blame to run diff-cache internally;
@@ -515,14 +491,13 @@ int do_diff_cache(const unsigned char *tree_sha1, struct diff_options *opt)
        if (!tree)
                die("bad tree object %s", sha1_to_hex(tree_sha1));
 
-       unpack_cb.revs = &revs;
-       unpack_cb.symcache[0] = '\0';
        memset(&opts, 0, sizeof(opts));
        opts.head_idx = 1;
        opts.index_only = 1;
+       opts.diff_index_cached = !DIFF_OPT_TST(opt, FIND_COPIES_HARDER);
        opts.merge = 1;
        opts.fn = oneway_diff;
-       opts.unpack_data = &unpack_cb;
+       opts.unpack_data = &revs;
        opts.src_index = &the_index;
        opts.dst_index = &the_index;
 
@@ -531,3 +506,18 @@ int do_diff_cache(const unsigned char *tree_sha1, struct diff_options *opt)
                exit(128);
        return 0;
 }
+
+int index_differs_from(const char *def, int diff_flags)
+{
+       struct rev_info rev;
+
+       init_revisions(&rev, NULL);
+       setup_revisions(0, NULL, &rev, def);
+       DIFF_OPT_SET(&rev.diffopt, QUICK);
+       DIFF_OPT_SET(&rev.diffopt, EXIT_WITH_STATUS);
+       rev.diffopt.flags |= diff_flags;
+       run_diff_index(&rev, 1);
+       if (rev.pending.alloc)
+               free(rev.pending.objects);
+       return (DIFF_OPT_TST(&rev.diffopt, HAS_CHANGES) != 0);
+}