Merge branch 'stable'

[ps-cgit] / shared.c

diff --git a/shared.c b/shared.c
index c58a2ff6ae6f643f7a9d944098374ccaaf55ade1..699c3624b1d67b28b8c111b6479df4c9bad43477 100644 (file)
--- a/shared.c
+++ b/shared.c
@@ -1,74 +1,532 @@
+/* shared.c: global vars + some callback functions
+ *
+ * Copyright (C) 2006 Lars Hjemli
+ *
+ * Licensed under GNU General Public License v2
+ *   (see COPYING for full license text)
+ */
+

 #include "cgit.h"
 #include "cgit.h"

+#include <stdio.h>
+#include <linux/limits.h>
+
+struct cgit_repolist cgit_repolist;
+struct cgit_context ctx;
+
+int chk_zero(int result, char *msg)
+{
+       if (result != 0)
+               die("%s: %s", msg, strerror(errno));
+       return result;
+}
+
+int chk_positive(int result, char *msg)
+{
+       if (result <= 0)
+               die("%s: %s", msg, strerror(errno));
+       return result;
+}
+
+int chk_non_negative(int result, char *msg)
+{
+       if (result < 0)
+               die("%s: %s",msg, strerror(errno));
+       return result;
+}
+
+struct cgit_repo *cgit_add_repo(const char *url)
+{
+       struct cgit_repo *ret;
+
+       if (++cgit_repolist.count > cgit_repolist.length) {
+               if (cgit_repolist.length == 0)
+                       cgit_repolist.length = 8;
+               else
+                       cgit_repolist.length *= 2;
+               cgit_repolist.repos = xrealloc(cgit_repolist.repos,
+                                              cgit_repolist.length *
+                                              sizeof(struct cgit_repo));
+       }
+
+       ret = &cgit_repolist.repos[cgit_repolist.count-1];
+       memset(ret, 0, sizeof(struct cgit_repo));
+       ret->url = trim_end(url, '/');
+       ret->name = ret->url;
+       ret->path = NULL;
+       ret->desc = "[no description]";
+       ret->owner = NULL;
+       ret->section = ctx.cfg.section;
+       ret->defbranch = "master";
+       ret->snapshots = ctx.cfg.snapshots;
+       ret->enable_commit_graph = ctx.cfg.enable_commit_graph;
+       ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
+       ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
+       ret->enable_remote_branches = ctx.cfg.enable_remote_branches;
+       ret->enable_subject_links = ctx.cfg.enable_subject_links;
+       ret->max_stats = ctx.cfg.max_stats;
+       ret->module_link = ctx.cfg.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;
+       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 *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;
+}
+
+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;
+}
+
+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;

 
 

-char *cgit_root         = "/usr/src/git";
-char *cgit_root_title   = "Git repository browser";
-char *cgit_css          = "/cgit.css";
-char *cgit_logo         = "/git-logo.png";
-char *cgit_logo_link    = "http://www.kernel.org/pub/software/scm/git/docs/";
-char *cgit_virtual_root = NULL;
+       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;
+}

 
 

-char *cgit_cache_root   = "/var/cache/cgit";
+/*
+ * 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_max_lock_attempts     =  5;
-int cgit_cache_root_ttl        =  5;
-int cgit_cache_repo_ttl        =  5;
-int cgit_cache_dynamic_ttl     =  5;
-int cgit_cache_static_ttl      = -1;
-int cgit_cache_max_create_time =  5;
+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;

 
 

-char *cgit_repo_name    = NULL;
-char *cgit_repo_desc    = NULL;
-char *cgit_repo_owner   = NULL;
+       if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
+               return 1;

 
 

-int cgit_query_has_symref = 0;
-int cgit_query_has_sha1   = 0;
+       *old_size = file1.size;
+       *new_size = file2.size;

 
 

-char *cgit_querystring  = NULL;
-char *cgit_query_repo   = NULL;
-char *cgit_query_page   = NULL;
-char *cgit_query_head   = NULL;
-char *cgit_query_sha1   = NULL;
+       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;
+       }

 
 

-int htmlfd = 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_global_config_cb(const char *name, const char *value)
+void cgit_diff_tree(const unsigned char *old_sha1,
+                   const unsigned char *new_sha1,
+                   filepair_fn fn, const char *prefix, int ignorews)

 {
 {

-       if (!strcmp(name, "root"))
-               cgit_root = xstrdup(value);
-       else if (!strcmp(name, "root-title"))
-               cgit_root_title = xstrdup(value);
-       else if (!strcmp(name, "css"))
-               cgit_css = xstrdup(value);
-       else if (!strcmp(name, "logo"))
-               cgit_logo = xstrdup(value);
-       else if (!strcmp(name, "logo-link"))
-               cgit_logo_link = xstrdup(value);
-       else if (!strcmp(name, "virtual-root"))
-               cgit_virtual_root = xstrdup(value);
+       struct diff_options opt;
+       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);
+       if (ignorews)
+               DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
+       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))
+               diff_tree_sha1(old_sha1, new_sha1, "", &opt);
+       else
+               diff_root_tree_sha1(new_sha1, "", &opt);
+       diffcore_std(&opt);
+       diff_flush(&opt);

 }
 
 }
 

-void cgit_repo_config_cb(const char *name, const char *value)
+void cgit_diff_commit(struct commit *commit, filepair_fn fn, const char *prefix)

 {
 {

-       if (!strcmp(name, "name"))
-               cgit_repo_name = xstrdup(value);
-       else if (!strcmp(name, "desc"))
-               cgit_repo_desc = xstrdup(value);
-       else if (!strcmp(name, "owner"))
-               cgit_repo_owner = xstrdup(value);
+       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);

 }
 
 }
 

-void cgit_querystring_cb(const char *name, const char *value)
+int cgit_parse_snapshots_mask(const char *str)

 {
 {

-       if (!strcmp(name,"r"))
-               cgit_query_repo = xstrdup(value);
-       else if (!strcmp(name, "p"))
-               cgit_query_page = xstrdup(value);
-       else if (!strcmp(name, "h")) {
-               cgit_query_head = xstrdup(value);
-               cgit_query_has_symref = 1;
-       } else if (!strcmp(name, "id")) {
-               cgit_query_sha1 = xstrdup(value);
-               cgit_query_has_sha1 = 1;
+       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 (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("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);
+}
+
+int is_token_char(char c)
+{
+       return isalnum(c) || c == '_';
+}
+
+/* Replace name with getenv(name), return pointer to zero-terminating char
+ */
+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;
+}