builtin-help: fallback to GIT_MAN_VIEWER before man

diff --git a/combine-diff.c b/combine-diff.c
index f1e7a4d5d98f8705b6a1a7a420dccc9ecad69d63..0cf2a830b5dad5c82d8a127cd57c8a8cba195631 100644 (file)
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -84,6 +84,7 @@ struct sline {
        /* bit 0 up to (N-1) are on if the parent has this line (i.e.
         * we did not change it).
         * bit N is used for "interesting" lines, including context.
+        * bit (N+1) is used for "do not show deletion before this".
         */
        unsigned long flag;
        unsigned long *p_lno;
@@ -142,8 +143,6 @@ static void append_lost(struct sline *sline, int n, const char *line, int len)
 }
 
 struct combine_diff_state {
-       struct xdiff_emit_state xm;
-
        unsigned int lno;
        int ob, on, nb, nn;
        unsigned long nmask;
@@ -216,17 +215,15 @@ static void combine_diff(const unsigned char *parent, mmfile_t *result_file,
        parent_file.size = sz;
        xpp.flags = XDF_NEED_MINIMAL;
        memset(&xecfg, 0, sizeof(xecfg));
-       ecb.outf = xdiff_outf;
-       ecb.priv = &state;
        memset(&state, 0, sizeof(state));
-       state.xm.consume = consume_line;
        state.nmask = nmask;
        state.sline = sline;
        state.lno = 1;
        state.num_parent = num_parent;
        state.n = n;
 
-       xdi_diff(&parent_file, result_file, &xpp, &xecfg, &ecb);
+       xdi_diff_outf(&parent_file, result_file, consume_line, &state,
+                     &xpp, &xecfg, &ecb);
        free(parent_file.ptr);
 
        /* Assign line numbers for this parent.
@@ -308,6 +305,7 @@ static int give_context(struct sline *sline, unsigned long cnt, int num_parent)
 {
        unsigned long all_mask = (1UL<<num_parent) - 1;
        unsigned long mark = (1UL<<num_parent);
+       unsigned long no_pre_delete = (2UL<<num_parent);
        unsigned long i;
 
        /* Two groups of interesting lines may have a short gap of
@@ -329,7 +327,7 @@ static int give_context(struct sline *sline, unsigned long cnt, int num_parent)
 
                /* Paint a few lines before the first interesting line. */
                while (j < i)
-                       sline[j++].flag |= mark;
+                       sline[j++].flag |= mark | no_pre_delete;
 
        again:
                /* we know up to i is to be included.  where does the
@@ -502,6 +500,7 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
                       int use_color)
 {
        unsigned long mark = (1UL<<num_parent);
+       unsigned long no_pre_delete = (2UL<<num_parent);
        int i;
        unsigned long lno = 0;
        const char *c_frag = diff_get_color(use_color, DIFF_FRAGINFO);
@@ -581,7 +580,7 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
                        int j;
                        unsigned long p_mask;
                        sl = &sline[lno++];
-                       ll = sl->lost_head;
+                       ll = (sl->flag & no_pre_delete) ? NULL : sl->lost_head;
                        while (ll) {
                                fputs(c_old, stdout);
                                for (j = 0; j < num_parent; j++) {
@@ -701,7 +700,7 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
                else if (0 <= (fd = open(elem->path, O_RDONLY)) &&
                         !fstat(fd, &st)) {
                        size_t len = xsize_t(st.st_size);
-                       size_t sz = 0;
+                       ssize_t done;
                        int is_file, i;
 
                        elem->mode = canon_mode(st.st_mode);
@@ -716,15 +715,26 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
 
                        result_size = len;
                        result = xmalloc(len + 1);
-                       while (sz < len) {
-                               ssize_t done = xread(fd, result+sz, len-sz);
-                               if (done == 0 && sz != len)
-                                       die("early EOF '%s'", elem->path);
-                               else if (done < 0)
-                                       die("read error '%s'", elem->path);
-                               sz += done;
-                       }
+
+                       done = read_in_full(fd, result, len);
+                       if (done < 0)
+                               die("read error '%s'", elem->path);
+                       else if (done < len)
+                               die("early EOF '%s'", elem->path);
+
                        result[len] = 0;
+
+                       /* If not a fake symlink, apply filters, e.g. autocrlf */
+                       if (is_file) {
+                               struct strbuf buf;
+
+                               strbuf_init(&buf, 0);
+                               if (convert_to_git(elem->path, result, len, &buf, safe_crlf)) {
+                                       free(result);
+                                       result = strbuf_detach(&buf, &len);
+                                       result_size = len;
+                               }
+                       }
                }
                else {
                deleted_file:
@@ -798,7 +808,7 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
                int deleted = 0;
 
                if (rev->loginfo && !rev->no_commit_id)
-                       show_log(rev, opt->msg_sep);
+                       show_log(rev);
                dump_quoted_path(dense ? "diff --cc " : "diff --combined ",
                                 "", elem->path, c_meta, c_reset);
                printf("%sindex ", c_meta);
@@ -881,7 +891,7 @@ static void show_raw_diff(struct combine_diff_path *p, int num_parent, struct re
                inter_name_termination = 0;
 
        if (rev->loginfo && !rev->no_commit_id)
-               show_log(rev, opt->msg_sep);
+               show_log(rev);
 
        if (opt->output_format & DIFF_FORMAT_RAW) {
                offset = strlen(COLONS) - num_parent;
@@ -962,7 +972,7 @@ void diff_tree_combined(const unsigned char *sha1,
                paths = intersect_paths(paths, i, num_parent);
 
                if (show_log_first && i == 0) {
-                       show_log(rev, opt->msg_sep);
+                       show_log(rev);
                        if (rev->verbose_header && opt->output_format)
                                putchar(opt->line_termination);
                }