tree-diff: do not assume we use only one pathspec

The way tree-diff was set up assumed we would use only one set
of pathspec during the entire life of the program.  Move the
pathspec related static variables out to diff_options structure
so that we can filter commits with one set of paths while show
the actual diffs using different set of paths.

I suspect this breaks blame.c, and makes "git log paths..." to
default to the --full-diff, the latter of which is dealt with
the next commit.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/diff-tree.c b/diff-tree.c
index 2a088d1..2b79dd0 100644 (file)
--- a/diff-tree.c
+++ b/diff-tree.c
@@ -120,7 +120,7 @@ int main(int argc, const char **argv)
        if (opt->diffopt.output_format == DIFF_FORMAT_PATCH)
                opt->diffopt.recursive = 1;
 
-       diff_tree_setup_paths(get_pathspec(prefix, argv));
+       diff_tree_setup_paths(get_pathspec(prefix, argv), opt);
        diff_setup_done(&opt->diffopt);
 
        switch (nr_sha1) {

diff --git a/diff.h b/diff.h
index a02ef28..cc7cc62 100644 (file)
--- a/diff.h
+++ b/diff.h
@@ -38,11 +38,15 @@ struct diff_options {
        int setup;
        int abbrev;
 
+       int nr_paths;
+       const char **paths;
+       int *pathlens;
        change_fn_t change;
        add_remove_fn_t add_remove;
 };
 
-extern void diff_tree_setup_paths(const char **paths);
+extern void diff_tree_setup_paths(const char **paths, struct diff_options *);
+extern void diff_tree_release_paths(struct diff_options *);
 extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
                     const char *base, struct diff_options *opt);
 extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,

diff --git a/revision.c b/revision.c
index fe26562..634f9a5 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -707,7 +707,7 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, const ch
                revs->limited = 1;
 
        if (revs->prune_data) {
-               diff_tree_setup_paths(revs->prune_data);
+               diff_tree_setup_paths(revs->prune_data, &diff_opt);
                revs->prune_fn = try_to_simplify_commit;
        }
 

diff --git a/tree-diff.c b/tree-diff.c
index 701fbba..1cdf8aa 100644 (file)
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -5,11 +5,6 @@
 #include "diff.h"
 #include "tree.h"
 
-// What paths are we interested in?
-static int nr_paths = 0;
-static const char **paths = NULL;
-static int *pathlens = NULL;
-
 static char *malloc_base(const char *base, const char *path, int pathlen)
 {
        int baselen = strlen(base);
@@ -72,14 +67,14 @@ static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2, const
        return 0;
 }
 
-static int interesting(struct tree_desc *desc, const char *base)
+static int interesting(struct tree_desc *desc, const char *base, struct diff_options *opt)
 {
        const char *path;
        unsigned mode;
        int i;
        int baselen, pathlen;
 
-       if (!nr_paths)
+       if (!opt->nr_paths)
                return 1;
 
        (void)tree_entry_extract(desc, &path, &mode);
@@ -87,9 +82,9 @@ static int interesting(struct tree_desc *desc, const char *base)
        pathlen = strlen(path);
        baselen = strlen(base);
 
-       for (i=0; i < nr_paths; i++) {
-               const char *match = paths[i];
-               int matchlen = pathlens[i];
+       for (i=0; i < opt->nr_paths; i++) {
+               const char *match = opt->paths[i];
+               int matchlen = opt->pathlens[i];
 
                if (baselen >= matchlen) {
                        /* If it doesn't match, move along... */
@@ -129,7 +124,7 @@ static int interesting(struct tree_desc *desc, const char *base)
 static void show_tree(struct diff_options *opt, const char *prefix, struct tree_desc *desc, const char *base)
 {
        while (desc->size) {
-               if (interesting(desc, base))
+               if (interesting(desc, base, opt))
                        show_entry(opt, prefix, desc, base);
                update_tree_entry(desc);
        }
@@ -167,11 +162,11 @@ static int show_entry(struct diff_options *opt, const char *prefix, struct tree_
 int diff_tree(struct tree_desc *t1, struct tree_desc *t2, const char *base, struct diff_options *opt)
 {
        while (t1->size | t2->size) {
-               if (nr_paths && t1->size && !interesting(t1, base)) {
+               if (opt->nr_paths && t1->size && !interesting(t1, base, opt)) {
                        update_tree_entry(t1);
                        continue;
                }
-               if (nr_paths && t2->size && !interesting(t2, base)) {
+               if (opt->nr_paths && t2->size && !interesting(t2, base, opt)) {
                        update_tree_entry(t2);
                        continue;
                }
@@ -229,19 +224,28 @@ static int count_paths(const char **paths)
        return i;
 }
 
-void diff_tree_setup_paths(const char **p)
+void diff_tree_release_paths(struct diff_options *opt)
 {
+       free(opt->pathlens);
+}
+
+void diff_tree_setup_paths(const char **p, struct diff_options *opt)
+{
+       opt->nr_paths = 0;
+       opt->pathlens = NULL;
+       opt->paths = NULL;
+
        if (p) {
                int i;
 
-               paths = p;
-               nr_paths = count_paths(paths);
-               if (nr_paths == 0) {
-                       pathlens = NULL;
+               opt->paths = p;
+               opt->nr_paths = count_paths(p);
+               if (opt->nr_paths == 0) {
+                       opt->pathlens = NULL;
                        return;
                }
-               pathlens = xmalloc(nr_paths * sizeof(int));
-               for (i=0; i<nr_paths; i++)
-                       pathlens[i] = strlen(paths[i]);
+               opt->pathlens = xmalloc(opt->nr_paths * sizeof(int));
+               for (i=0; i < opt->nr_paths; i++)
+                       opt->pathlens[i] = strlen(p[i]);
        }
 }