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/* ui-tree.c: functions for tree output
 *
 * Copyright (C) 2006 Lars Hjemli
 *
 * Licensed under GNU General Public License v2
 *   (see COPYING for full license text)
 */

#include "cgit.h"
#include "html.h"
#include "ui-shared.h"

char *curr_rev;
char *match_path;
int header = 0;

static void print_object(const unsigned char *sha1, char *path)
{
	enum object_type type;
	char *buf;
	unsigned long size, lineno, idx;
	const char *numberfmt = "<a class='no' id='n%1$d' name='n%1$d' href='#n%1$d'>%1$d</a>\n";

	type = sha1_object_info(sha1, &size);
	if (type == OBJ_BAD) {
		cgit_print_error(fmt("Bad object name: %s",
				     sha1_to_hex(sha1)));
		return;
	}

	buf = read_sha1_file(sha1, &type, &size);
	if (!buf) {
		cgit_print_error(fmt("Error reading object %s",
				     sha1_to_hex(sha1)));
		return;
	}

	html(" (");
	cgit_plain_link("plain", NULL, NULL, ctx.qry.head,
		        curr_rev, path);
	htmlf(")<br/>blob: %s\n", sha1_to_hex(sha1));

	html("<table summary='blob content' class='blob'>\n");
	html("<tr>\n");

	html("<td class='linenumbers'><pre>");
	idx = 0;
	lineno = 0;
	htmlf(numberfmt, ++lineno);
	while(idx < size - 1) { // skip absolute last newline
		if (buf[idx] == '\n') {
			htmlf(numberfmt, ++lineno);
		}
		idx++;
	}
	html("</pre></td>\n");

	html("<td class='lines'><pre><code>");
	html_txt(buf);
	html("</code></pre></td>\n");

	html("</tr>\n");
	html("</table>\n");
}


static int ls_item(const unsigned char *sha1, const char *base, int baselen,
		   const char *pathname, unsigned int mode, int stage,
		   void *cbdata)
{
	char *name;
	char *fullpath;
	enum object_type type;
	unsigned long size = 0;

	name = xstrdup(pathname);
	fullpath = fmt("%s%s%s", ctx.qry.path ? ctx.qry.path : "",
		       ctx.qry.path ? "/" : "", name);

	if (!S_ISGITLINK(mode)) {
		type = sha1_object_info(sha1, &size);
		if (type == OBJ_BAD) {
			htmlf("<tr><td colspan='3'>Bad object: %s %s</td></tr>",
			      name,
			      sha1_to_hex(sha1));
			return 0;
		}
	}

	html("<tr><td class='ls-mode'>");
	cgit_print_filemode(mode);
	html("</td><td>");
	if (S_ISGITLINK(mode)) {
		htmlf("<a class='ls-mod' href='");
		html_attr(fmt(ctx.repo->module_link,
			      name,
			      sha1_to_hex(sha1)));
		html("'>");
		html_txt(name);
		html("</a>");
	} else if (S_ISDIR(mode)) {
		cgit_tree_link(name, NULL, "ls-dir", ctx.qry.head,
			       curr_rev, fullpath);
	} else {
		cgit_tree_link(name, NULL, "ls-blob", ctx.qry.head,
			       curr_rev, fullpath);
	}
	htmlf("</td><td class='ls-size'>%li</td>", size);

	html("<td>");
	cgit_log_link("log", NULL, "button", ctx.qry.head, curr_rev,
		      fullpath, 0, NULL, NULL, ctx.qry.showmsg);
	if (ctx.repo->max_stats)
		cgit_stats_link("stats", NULL, "button", ctx.qry.head,
				fullpath);
	html("</td></tr>\n");
	free(name);
	return 0;
}

static void ls_head()
{
	html("<table summary='tree listing' class='list'>\n");
	html("<tr class='nohover'>");
	html("<th class='left'>Mode</th>");
	html("<th class='left'>Name</th>");
	html("<th class='right'>Size</th>");
	html("<th/>");
	html("</tr>\n");
	header = 1;
}

static void ls_tail()
{
	if (!header)
		return;
	html("</table>\n");
	header = 0;
}

static void ls_tree(const unsigned char *sha1, char *path)
{
	struct tree *tree;

	tree = parse_tree_indirect(sha1);
	if (!tree) {
		cgit_print_error(fmt("Not a tree object: %s",
				     sha1_to_hex(sha1)));
		return;
	}

	ls_head();
	read_tree_recursive(tree, "", 0, 1, NULL, ls_item, NULL);
	ls_tail();
}


static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
		     const char *pathname, unsigned mode, int stage,
		     void *cbdata)
{
	static int state;
	static char buffer[PATH_MAX];
	char *url;

	if (state == 0) {
		memcpy(buffer, base, baselen);
		strcpy(buffer+baselen, pathname);
		url = cgit_pageurl(ctx.qry.repo, "tree",
				   fmt("h=%s&amp;path=%s", curr_rev, buffer));
		html("/");
		cgit_tree_link(xstrdup(pathname), NULL, NULL, ctx.qry.head,
			       curr_rev, buffer);

		if (strcmp(match_path, buffer))
			return READ_TREE_RECURSIVE;

		if (S_ISDIR(mode)) {
			state = 1;
			ls_head();
			return READ_TREE_RECURSIVE;
		} else {
			print_object(sha1, buffer);
			return 0;
		}
	}
	ls_item(sha1, base, baselen, pathname, mode, stage, NULL);
	return 0;
}


/*
 * Show a tree or a blob
 *   rev:  the commit pointing at the root tree object
 *   path: path to tree or blob
 */
void cgit_print_tree(const char *rev, char *path)
{
	unsigned char sha1[20];
	struct commit *commit;
	const char *paths[] = {path, NULL};

	if (!rev)
		rev = ctx.qry.head;

	curr_rev = xstrdup(rev);
	if (get_sha1(rev, sha1)) {
		cgit_print_error(fmt("Invalid revision name: %s", rev));
		return;
	}
	commit = lookup_commit_reference(sha1);
	if (!commit || parse_commit(commit)) {
		cgit_print_error(fmt("Invalid commit reference: %s", rev));
		return;
	}

	html("path: <a href='");
	html_attr(cgit_pageurl(ctx.qry.repo, "tree", fmt("h=%s", rev)));
	html("'>root</a>");

	if (path == NULL) {
		ls_tree(commit->tree->object.sha1, NULL);
		return;
	}

	match_path = path;
	read_tree_recursive(commit->tree, NULL, 0, 0, paths, walk_tree, NULL);
	ls_tail();
}
pan class="w"> ref->commit = cgit_parse_commit((struct commit *)ref->object); break; } return ref; } int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags, void *cb_data) { struct reflist *list = (struct reflist *)cb_data; struct refinfo *info = cgit_mk_refinfo(refname, sha1); if (info) cgit_add_ref(list, info); return 0; } void cgit_diff_tree_cb(struct diff_queue_struct *q, struct diff_options *options, void *data) { int i; for (i = 0; i < q->nr; i++) { if (q->queue[i]->status == 'U') continue; ((filepair_fn)data)(q->queue[i]); } } static int load_mmfile(mmfile_t *file, const unsigned char *sha1) { enum object_type type; if (is_null_sha1(sha1)) { file->ptr = (char *)""; file->size = 0; } else { file->ptr = read_sha1_file(sha1, &type, (unsigned long *)&file->size); } return 1; } /* * Receive diff-buffers from xdiff and concatenate them as * needed across multiple callbacks. * * This is basically a copy of xdiff-interface.c/xdiff_outf(), * ripped from git and modified to use globals instead of * a special callback-struct. */ char *diffbuf = NULL; int buflen = 0; int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf) { int i; for (i = 0; i < nbuf; i++) { if (mb[i].ptr[mb[i].size-1] != '\n') { /* Incomplete line */ diffbuf = xrealloc(diffbuf, buflen + mb[i].size); memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size); buflen += mb[i].size; continue; } /* we have a complete line */ if (!diffbuf) { ((linediff_fn)priv)(mb[i].ptr, mb[i].size); continue; } diffbuf = xrealloc(diffbuf, buflen + mb[i].size); memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size); ((linediff_fn)priv)(diffbuf, buflen + mb[i].size); free(diffbuf); diffbuf = NULL; buflen = 0; } if (diffbuf) { ((linediff_fn)priv)(diffbuf, buflen); free(diffbuf); diffbuf = NULL; buflen = 0; } return 0; } int cgit_diff_files(const unsigned char *old_sha1, const unsigned char *new_sha1, unsigned long *old_size, unsigned long *new_size, int *binary, linediff_fn fn) { mmfile_t file1, file2; xpparam_t diff_params; xdemitconf_t emit_params; xdemitcb_t emit_cb; if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1)) return 1; *old_size = file1.size; *new_size = file2.size; if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) || (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) { *binary = 1; if (file1.size) free(file1.ptr); if (file2.size) free(file2.ptr); return 0; } memset(&diff_params, 0, sizeof(diff_params)); memset(&emit_params, 0, sizeof(emit_params)); memset(&emit_cb, 0, sizeof(emit_cb)); diff_params.flags = XDF_NEED_MINIMAL; emit_params.ctxlen = 3; emit_params.flags = XDL_EMIT_FUNCNAMES; emit_cb.outf = filediff_cb; emit_cb.priv = fn; xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb); if (file1.size) free(file1.ptr); if (file2.size) free(file2.ptr); return 0; } void cgit_diff_tree(const unsigned char *old_sha1, const unsigned char *new_sha1, filepair_fn fn, const char *prefix) { struct diff_options opt; int ret; int prefixlen; diff_setup(&opt); opt.output_format = DIFF_FORMAT_CALLBACK; opt.detect_rename = 1; opt.rename_limit = ctx.cfg.renamelimit; DIFF_OPT_SET(&opt, RECURSIVE); opt.format_callback = cgit_diff_tree_cb; opt.format_callback_data = fn; if (prefix) { opt.nr_paths = 1; opt.paths = &prefix; prefixlen = strlen(prefix); opt.pathlens = &prefixlen; } diff_setup_done(&opt); if (old_sha1 && !is_null_sha1(old_sha1)) ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt); else ret = diff_root_tree_sha1(new_sha1, "", &opt); diffcore_std(&opt); diff_flush(&opt); } void cgit_diff_commit(struct commit *commit, filepair_fn fn) { unsigned char *old_sha1 = NULL; if (commit->parents) old_sha1 = commit->parents->item->object.sha1; cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL); } int cgit_parse_snapshots_mask(const char *str) { const struct cgit_snapshot_format *f; static const char *delim = " \t,:/|;"; int tl, sl, rv = 0; /* favor legacy setting */ if(atoi(str)) return 1; for(;;) { str += strspn(str,delim); tl = strcspn(str,delim); if (!tl) break; for (f = cgit_snapshot_formats; f->suffix; f++) { sl = strlen(f->suffix); if((tl == sl && !strncmp(f->suffix, str, tl)) || (tl == sl-1 && !strncmp(f->suffix+1, str, tl-1))) { rv |= f->bit; break; } } str += tl; } return rv; } int cgit_open_filter(struct cgit_filter *filter) { filter->old_stdout = chk_positive(dup(STDOUT_FILENO), "Unable to duplicate STDOUT"); chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess"); filter->pid = chk_non_negative(fork(), "Unable to create subprocess"); if (filter->pid == 0) { close(filter->pipe_fh[1]); chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO), "Unable to use pipe as STDIN"); execvp(filter->cmd, filter->argv); die("Unable to exec subprocess %s: %s (%d)", filter->cmd, strerror(errno), errno); } close(filter->pipe_fh[0]); chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO), "Unable to use pipe as STDOUT"); close(filter->pipe_fh[1]); return 0; } int cgit_close_filter(struct cgit_filter *filter) { chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO), "Unable to restore STDOUT"); close(filter->old_stdout); if (filter->pid < 0) return 0; waitpid(filter->pid, &filter->exitstatus, 0); if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus)) return 0; die("Subprocess %s exited abnormally", filter->cmd); } /* Read the content of the specified file into a newly allocated buffer, * zeroterminate the buffer and return 0 on success, errno otherwise. */ int readfile(const char *path, char **buf, size_t *size) { int fd, e; struct stat st; fd = open(path, O_RDONLY); if (fd == -1) return errno; if (fstat(fd, &st)) { e = errno; close(fd); return e; } if (!S_ISREG(st.st_mode)) { close(fd); return EISDIR; } *buf = xmalloc(st.st_size + 1); *size = read_in_full(fd, *buf, st.st_size); e = errno; (*buf)[*size] = '\0'; close(fd); return (*size == st.st_size ? 0 : e); }