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/* cmd.c: the cgit command dispatcher
 *
 * Copyright (C) 2008 Lars Hjemli
 *
 * Licensed under GNU General Public License v2
 *   (see COPYING for full license text)
 */

#include "cgit.h"
#include "cmd.h"
#include "cache.h"
#include "ui-shared.h"
#include "ui-atom.h"
#include "ui-blob.h"
#include "ui-clone.h"
#include "ui-commit.h"
#include "ui-diff.h"
#include "ui-log.h"
#include "ui-patch.h"
#include "ui-plain.h"
#include "ui-refs.h"
#include "ui-repolist.h"
#include "ui-snapshot.h"
#include "ui-stats.h"
#include "ui-summary.h"
#include "ui-tag.h"
#include "ui-tree.h"

static void HEAD_fn(struct cgit_context *ctx)
{
	cgit_clone_head(ctx);
}

static void atom_fn(struct cgit_context *ctx)
{
	cgit_print_atom(ctx->qry.head, ctx->qry.path, 10);
}

static void about_fn(struct cgit_context *ctx)
{
	if (ctx->repo)
		cgit_print_repo_readme(ctx->qry.path);
	else
		cgit_print_site_readme();
}

static void blob_fn(struct cgit_context *ctx)
{
	cgit_print_blob(ctx->qry.sha1, ctx->qry.path, ctx->qry.head);
}

static void commit_fn(struct cgit_context *ctx)
{
	cgit_print_commit(ctx->qry.sha1);
}

static void diff_fn(struct cgit_context *ctx)
{
	cgit_print_diff(ctx->qry.sha1, ctx->qry.sha2, ctx->qry.path);
}

static void info_fn(struct cgit_context *ctx)
{
	cgit_clone_info(ctx);
}

static void log_fn(struct cgit_context *ctx)
{
	cgit_print_log(ctx->qry.sha1, ctx->qry.ofs, ctx->cfg.max_commit_count,
		       ctx->qry.grep, ctx->qry.search, ctx->qry.path, 1);
}

static void ls_cache_fn(struct cgit_context *ctx)
{
	ctx->page.mimetype = "text/plain";
	ctx->page.filename = "ls-cache.txt";
	cgit_print_http_headers(ctx);
	cache_ls(ctx->cfg.cache_root);
}

static void objects_fn(struct cgit_context *ctx)
{
	cgit_clone_objects(ctx);
}

static void repolist_fn(struct cgit_context *ctx)
{
	cgit_print_repolist();
}

static void patch_fn(struct cgit_context *ctx)
{
	cgit_print_patch(ctx->qry.sha1);
}

static void plain_fn(struct cgit_context *ctx)
{
	cgit_print_plain(ctx);
}

static void refs_fn(struct cgit_context *ctx)
{
	cgit_print_refs();
}

static void snapshot_fn(struct cgit_context *ctx)
{
	cgit_print_snapshot(ctx->qry.head, ctx->qry.sha1, ctx->qry.path,
			    ctx->repo->snapshots, ctx->qry.nohead);
}

static void stats_fn(struct cgit_context *ctx)
{
	cgit_show_stats(ctx);
}

static void summary_fn(struct cgit_context *ctx)
{
	cgit_print_summary();
}

static void tag_fn(struct cgit_context *ctx)
{
	cgit_print_tag(ctx->qry.sha1);
}

static void tree_fn(struct cgit_context *ctx)
{
	cgit_print_tree(ctx->qry.sha1, ctx->qry.path);
}

#define def_cmd(name, want_repo, want_layout) \
	{#name, name##_fn, want_repo, want_layout}

struct cgit_cmd *cgit_get_cmd(struct cgit_context *ctx)
{
	static struct cgit_cmd cmds[] = {
		def_cmd(HEAD, 1, 0),
		def_cmd(atom, 1, 0),
		def_cmd(about, 0, 1),
		def_cmd(blob, 1, 0),
		def_cmd(commit, 1, 1),
		def_cmd(diff, 1, 1),
		def_cmd(info, 1, 0),
		def_cmd(log, 1, 1),
		def_cmd(ls_cache, 0, 0),
		def_cmd(objects, 1, 0),
		def_cmd(patch, 1, 0),
		def_cmd(plain, 1, 0),
		def_cmd(refs, 1, 1),
		def_cmd(repolist, 0, 0),
		def_cmd(snapshot, 1, 0),
		def_cmd(stats, 1, 1),
		def_cmd(summary, 1, 1),
		def_cmd(tag, 1, 1),
		def_cmd(tree, 1, 1),
	};
	int i;

	if (ctx->qry.page == NULL) {
		if (ctx->repo)
			ctx->qry.page = "summary";
		else
			ctx->qry.page = "repolist";
	}

	for(i = 0; i < sizeof(cmds)/sizeof(*cmds); i++)
		if (!strcmp(ctx->qry.page, cmds[i].name))
			return &cmds[i];
	return NULL;
}
.module_link; ret->readme = ctx.cfg.readme; ret->mtime = -1; ret->about_filter = ctx.cfg.about_filter; ret->commit_filter = ctx.cfg.commit_filter; ret->source_filter = ctx.cfg.source_filter; ret->clone_url = ctx.cfg.clone_url; ret->submodules.strdup_strings = 1; return ret; } struct cgit_repo *cgit_get_repoinfo(const char *url) { int i; struct cgit_repo *repo; for (i = 0; i < cgit_repolist.count; i++) { repo = &cgit_repolist.repos[i]; if (!strcmp(repo->url, url)) return repo; } return NULL; } void *cgit_free_commitinfo(struct commitinfo *info) { free(info->author); free(info->author_email); free(info->committer); free(info->committer_email); free(info->subject); free(info->msg); free(info->msg_encoding); free(info); return NULL; } char *trim_end(const char *str, char c) { int len; if (str == NULL) return NULL; len = strlen(str); while (len > 0 && str[len - 1] == c) len--; if (len == 0) return NULL; return xstrndup(str, len); } char *ensure_end(const char *str, char c) { size_t len = strlen(str); char *result; if (len && str[len - 1] == c) return xstrndup(str, len); result = xmalloc(len + 2); memcpy(result, str, len); result[len] = '/'; result[len + 1] = '\0'; return result; } void strbuf_ensure_end(struct strbuf *sb, char c) { if (!sb->len || sb->buf[sb->len - 1] != c) strbuf_addch(sb, c); } char *strlpart(char *txt, int maxlen) { char *result; if (!txt) return txt; if (strlen(txt) <= maxlen) return txt; result = xmalloc(maxlen + 1); memcpy(result, txt, maxlen - 3); result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.'; result[maxlen] = '\0'; return result; } char *strrpart(char *txt, int maxlen) { char *result; if (!txt) return txt; if (strlen(txt) <= maxlen) return txt; result = xmalloc(maxlen + 1); memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3); result[0] = result[1] = result[2] = '.'; return result; } void cgit_add_ref(struct reflist *list, struct refinfo *ref) { size_t size; if (list->count >= list->alloc) { list->alloc += (list->alloc ? list->alloc : 4); size = list->alloc * sizeof(struct refinfo *); list->refs = xrealloc(list->refs, size); } list->refs[list->count++] = ref; } static struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1) { struct refinfo *ref; ref = xmalloc(sizeof (struct refinfo)); ref->refname = xstrdup(refname); ref->object = parse_object(sha1); switch (ref->object->type) { case OBJ_TAG: ref->tag = cgit_parse_tag((struct tag *)ref->object); break; case OBJ_COMMIT: ref->commit = cgit_parse_commit((struct commit *)ref->object); break; } return ref; } static void cgit_free_taginfo(struct taginfo *tag) { if (tag->tagger) free(tag->tagger); if (tag->tagger_email) free(tag->tagger_email); if (tag->msg) free(tag->msg); free(tag); } static void cgit_free_refinfo(struct refinfo *ref) { if (ref->refname) free((char *)ref->refname); switch (ref->object->type) { case OBJ_TAG: cgit_free_taginfo(ref->tag); break; case OBJ_COMMIT: cgit_free_commitinfo(ref->commit); break; } free(ref); } void cgit_free_reflist_inner(struct reflist *list) { int i; for (i = 0; i < list->count; i++) { cgit_free_refinfo(list->refs[i]); } free(list->refs); } 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; } static 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; static 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, int context, int ignorews, 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; if (ignorews) diff_params.flags |= XDF_IGNORE_WHITESPACE; emit_params.ctxlen = context > 0 ? context : 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, int ignorews) { struct diff_options opt; struct pathspec_item item; diff_setup(&opt); opt.output_format = DIFF_FORMAT_CALLBACK; opt.detect_rename = 1; opt.rename_limit = ctx.cfg.renamelimit; DIFF_OPT_SET(&opt, RECURSIVE); if (ignorews) DIFF_XDL_SET(&opt, IGNORE_WHITESPACE); opt.format_callback = cgit_diff_tree_cb; opt.format_callback_data = fn; if (prefix) { item.match = prefix; item.len = strlen(prefix); opt.pathspec.nr = 1; opt.pathspec.items = &item; } diff_setup_done(&opt); if (old_sha1 && !is_null_sha1(old_sha1)) diff_tree_sha1(old_sha1, new_sha1, "", &opt); else diff_root_tree_sha1(new_sha1, "", &opt); diffcore_std(&opt); diff_flush(&opt); } void cgit_diff_commit(struct commit *commit, filepair_fn fn, const char *prefix) { unsigned char *old_sha1 = NULL; if (commit->parents) old_sha1 = commit->parents->item->object.sha1; cgit_diff_tree(old_sha1, commit->object.sha1, fn, prefix, ctx.qry.ignorews); } 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; } typedef struct { char * name; char * value; } cgit_env_var; void cgit_prepare_repo_env(struct cgit_repo * repo) { cgit_env_var env_vars[] = { { .name = "CGIT_REPO_URL", .value = repo->url }, { .name = "CGIT_REPO_NAME", .value = repo->name }, { .name = "CGIT_REPO_PATH", .value = repo->path }, { .name = "CGIT_REPO_OWNER", .value = repo->owner }, { .name = "CGIT_REPO_DEFBRANCH", .value = repo->defbranch }, { .name = "CGIT_REPO_SECTION", .value = repo->section }, { .name = "CGIT_REPO_CLONE_URL", .value = repo->clone_url } }; int env_var_count = ARRAY_SIZE(env_vars); cgit_env_var *p, *q; static char *warn = "cgit warning: failed to set env: %s=%s\n"; p = env_vars; q = p + env_var_count; for (; p < q; p++) if (p->value && setenv(p->name, p->value, 1)) fprintf(stderr, warn, p->name, p->value); } 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_errno("Unable to exec subprocess %s", filter->cmd); } 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); } static int is_token_char(char c) { return isalnum(c) || c == '_'; } /* Replace name with getenv(name), return pointer to zero-terminating char */ static char *expand_macro(char *name, int maxlength) { char *value; int len; len = 0; value = getenv(name); if (value) { len = strlen(value); if (len > maxlength) len = maxlength; strncpy(name, value, len); } return name + len; } #define EXPBUFSIZE (1024 * 8) /* Replace all tokens prefixed by '$' in the specified text with the * value of the named environment variable. * NB: the return value is a static buffer, i.e. it must be strdup'd * by the caller. */ char *expand_macros(const char *txt) { static char result[EXPBUFSIZE]; char *p, *start; int len; p = result; start = NULL; while (p < result + EXPBUFSIZE - 1 && txt && *txt) { *p = *txt; if (start) { if (!is_token_char(*txt)) { if (p - start > 0) { *p = '\0'; len = result + EXPBUFSIZE - start - 1; p = expand_macro(start, len) - 1; } start = NULL; txt--; } p++; txt++; continue; } if (*txt == '$') { start = p; txt++; continue; } p++; txt++; } *p = '\0'; if (start && p - start > 0) { len = result + EXPBUFSIZE - start - 1; p = expand_macro(start, len); *p = '\0'; } return result; }