t/lib-diff-alternative: abstract away SHA-1-specific constants
[gitweb.git] / config.c
index 036bae205c11f945c4ddbe63added4b399fcca87..6f8f1d8c1130f89ccf913cc7f7cafac3dd39e123 100644 (file)
--- a/config.c
+++ b/config.c
@@ -9,13 +9,14 @@
 #include "config.h"
 #include "repository.h"
 #include "lockfile.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "strbuf.h"
 #include "quote.h"
 #include "hashmap.h"
 #include "string-list.h"
 #include "utf8.h"
 #include "dir.h"
+#include "color.h"
 
 struct config_source {
        struct config_source *prev;
@@ -1067,6 +1068,15 @@ int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *
        return 0;
 }
 
+int git_config_color(char *dest, const char *var, const char *value)
+{
+       if (!value)
+               return config_error_nonbool(var);
+       if (color_parse(value, dest) < 0)
+               return -1;
+       return 0;
+}
+
 static int git_default_core_config(const char *var, const char *value)
 {
        /* This needs a better name */
@@ -1216,11 +1226,14 @@ static int git_default_core_config(const char *var, const char *value)
        }
 
        if (!strcmp(var, "core.safecrlf")) {
+               int eol_rndtrp_die;
                if (value && !strcasecmp(value, "warn")) {
-                       safe_crlf = SAFE_CRLF_WARN;
+                       global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
                        return 0;
                }
-               safe_crlf = git_config_bool(var, value);
+               eol_rndtrp_die = git_config_bool(var, value);
+               global_conv_flags_eol = eol_rndtrp_die ?
+                       CONV_EOL_RNDTRP_DIE : CONV_EOL_RNDTRP_WARN;
                return 0;
        }
 
@@ -1236,6 +1249,11 @@ static int git_default_core_config(const char *var, const char *value)
                return 0;
        }
 
+       if (!strcmp(var, "core.checkroundtripencoding")) {
+               check_roundtrip_encoding = xstrdup(value);
+               return 0;
+       }
+
        if (!strcmp(var, "core.notesref")) {
                notes_ref_name = xstrdup(value);
                return 0;
@@ -1290,6 +1308,11 @@ static int git_default_core_config(const char *var, const char *value)
                return 0;
        }
 
+       if (!strcmp(var, "core.commitgraph")) {
+               core_commit_graph = git_config_bool(var, value);
+               return 0;
+       }
+
        if (!strcmp(var, "core.sparsecheckout")) {
                core_apply_sparse_checkout = git_config_bool(var, value);
                return 0;
@@ -1318,6 +1341,11 @@ static int git_default_core_config(const char *var, const char *value)
                return 0;
        }
 
+       if (!strcmp(var, "core.partialclonefilter")) {
+               return git_config_string(&core_partial_clone_filter_default,
+                                        var, value);
+       }
+
        /* Add other config variables here and to Documentation/config.txt. */
        return 0;
 }
@@ -1424,7 +1452,7 @@ int git_default_config(const char *var, const char *value, void *dummy)
        if (starts_with(var, "mailmap."))
                return git_default_mailmap_config(var, value);
 
-       if (starts_with(var, "advice."))
+       if (starts_with(var, "advice.") || starts_with(var, "color.advice"))
                return git_default_advice_config(var, value);
 
        if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
@@ -1486,6 +1514,7 @@ static int do_config_from_file(config_fn_t fn,
                void *data, const struct config_options *opts)
 {
        struct config_source top;
+       int ret;
 
        top.u.file = f;
        top.origin_type = origin_type;
@@ -1496,7 +1525,10 @@ static int do_config_from_file(config_fn_t fn,
        top.do_ungetc = config_file_ungetc;
        top.do_ftell = config_file_ftell;
 
-       return do_config_from(&top, fn, data, opts);
+       flockfile(f);
+       ret = do_config_from(&top, fn, data, opts);
+       funlockfile(f);
+       return ret;
 }
 
 static int git_config_from_stdin(config_fn_t fn, void *data)
@@ -1514,10 +1546,8 @@ int git_config_from_file_with_options(config_fn_t fn, const char *filename,
 
        f = fopen_or_warn(filename, "r");
        if (f) {
-               flockfile(f);
                ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename,
                                          filename, f, data, opts);
-               funlockfile(f);
                fclose(f);
        }
        return ret;
@@ -1557,7 +1587,7 @@ int git_config_from_blob_oid(config_fn_t fn,
        unsigned long size;
        int ret;
 
-       buf = read_sha1_file(oid->hash, &type, &size);
+       buf = read_object_file(oid, &type, &size);
        if (!buf)
                return error("unable to load config blob object '%s'", name);
        if (type != OBJ_BLOB) {
@@ -2294,8 +2324,12 @@ struct config_store_data {
        int do_not_match;
        regex_t *value_regex;
        int multi_replace;
-       size_t *seen;
-       unsigned int seen_nr, seen_alloc;
+       struct {
+               size_t begin, end;
+               enum config_event_t type;
+               int is_keys_section;
+       } *parsed;
+       unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc;
        unsigned int key_seen:1, section_seen:1, is_keys_section:1;
 };
 
@@ -2313,10 +2347,40 @@ static int matches(const char *key, const char *value,
                (value && !regexec(store->value_regex, value, 0, NULL, 0));
 }
 
+static int store_aux_event(enum config_event_t type,
+                          size_t begin, size_t end, void *data)
+{
+       struct config_store_data *store = data;
+
+       ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc);
+       store->parsed[store->parsed_nr].begin = begin;
+       store->parsed[store->parsed_nr].end = end;
+       store->parsed[store->parsed_nr].type = type;
+
+       if (type == CONFIG_EVENT_SECTION) {
+               if (cf->var.len < 2 || cf->var.buf[cf->var.len - 1] != '.')
+                       BUG("Invalid section name '%s'", cf->var.buf);
+
+               /* Is this the section we were looking for? */
+               store->is_keys_section =
+                       store->parsed[store->parsed_nr].is_keys_section =
+                       cf->var.len - 1 == store->baselen &&
+                       !strncasecmp(cf->var.buf, store->key, store->baselen);
+               if (store->is_keys_section) {
+                       store->section_seen = 1;
+                       ALLOC_GROW(store->seen, store->seen_nr + 1,
+                                  store->seen_alloc);
+                       store->seen[store->seen_nr] = store->parsed_nr;
+               }
+       }
+
+       store->parsed_nr++;
+
+       return 0;
+}
+
 static int store_aux(const char *key, const char *value, void *cb)
 {
-       const char *ep;
-       size_t section_len;
        struct config_store_data *store = cb;
 
        if (store->key_seen) {
@@ -2328,55 +2392,21 @@ static int store_aux(const char *key, const char *value, void *cb)
                        ALLOC_GROW(store->seen, store->seen_nr + 1,
                                   store->seen_alloc);
 
-                       store->seen[store->seen_nr] = cf->do_ftell(cf);
+                       store->seen[store->seen_nr] = store->parsed_nr;
                        store->seen_nr++;
                }
-               return 0;
        } else if (store->is_keys_section) {
                /*
-                * What we are looking for is in store->key (both
-                * section and var), and its section part is baselen
-                * long.  We found key (again, both section and var).
-                * We would want to know if this key is in the same
-                * section as what we are looking for.  We already
-                * know we are in the same section as what should
-                * hold store->key.
+                * Do not increment matches yet: this may not be a match, but we
+                * are in the desired section.
                 */
-               ep = strrchr(key, '.');
-               section_len = ep - key;
-
-               if ((section_len != store->baselen) ||
-                   memcmp(key, store->key, section_len+1)) {
-                       store->is_keys_section = 0;
-                       return 0;
-               }
-               /*
-                * Do not increment matches: this is no match, but we
-                * just made sure we are in the desired section.
-                */
-               ALLOC_GROW(store->seen, store->seen_nr + 1,
-                          store->seen_alloc);
-               store->seen[store->seen_nr] = cf->do_ftell(cf);
-       }
-
-       if (matches(key, value, store)) {
-               ALLOC_GROW(store->seen, store->seen_nr + 1,
-                          store->seen_alloc);
-               store->seen[store->seen_nr] = cf->do_ftell(cf);
-               store->seen_nr++;
-               store->key_seen = 1;
+               ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc);
+               store->seen[store->seen_nr] = store->parsed_nr;
                store->section_seen = 1;
-               store->is_keys_section = 1;
-       } else {
-               if (strrchr(key, '.') - key == store->baselen &&
-                     !strncmp(key, store->key, store->baselen)) {
-                               store->section_seen = 1;
-                               store->is_keys_section = 1;
-                               ALLOC_GROW(store->seen,
-                                          store->seen_nr + 1,
-                                          store->seen_alloc);
-                               store->seen[store->seen_nr] =
-                                       cf->do_ftell(cf);
+
+               if (matches(key, value, store)) {
+                       store->seen_nr++;
+                       store->key_seen = 1;
                }
        }
 
@@ -2477,30 +2507,85 @@ static ssize_t write_pair(int fd, const char *key, const char *value,
        return ret;
 }
 
-static ssize_t find_beginning_of_line(const char *contents, size_t size,
-       size_t offset_, int *found_bracket)
+/*
+ * If we are about to unset the last key(s) in a section, and if there are
+ * no comments surrounding (or included in) the section, we will want to
+ * extend begin/end to remove the entire section.
+ *
+ * Note: the parameter `seen_ptr` points to the index into the store.seen
+ * array.  * This index may be incremented if a section has more than one
+ * entry (which all are to be removed).
+ */
+static void maybe_remove_section(struct config_store_data *store,
+                                const char *contents,
+                                size_t *begin_offset, size_t *end_offset,
+                                int *seen_ptr)
 {
-       size_t equal_offset = size, bracket_offset = size;
-       ssize_t offset;
+       size_t begin;
+       int i, seen, section_seen = 0;
 
-contline:
-       for (offset = offset_-2; offset > 0
-                       && contents[offset] != '\n'; offset--)
-               switch (contents[offset]) {
-                       case '=': equal_offset = offset; break;
-                       case ']': bracket_offset = offset; break;
+       /*
+        * First, ensure that this is the first key, and that there are no
+        * comments before the entry nor before the section header.
+        */
+       seen = *seen_ptr;
+       for (i = store->seen[seen]; i > 0; i--) {
+               enum config_event_t type = store->parsed[i - 1].type;
+
+               if (type == CONFIG_EVENT_COMMENT)
+                       /* There is a comment before this entry or section */
+                       return;
+               if (type == CONFIG_EVENT_ENTRY) {
+                       if (!section_seen)
+                               /* This is not the section's first entry. */
+                               return;
+                       /* We encountered no comment before the section. */
+                       break;
+               }
+               if (type == CONFIG_EVENT_SECTION) {
+                       if (!store->parsed[i - 1].is_keys_section)
+                               break;
+                       section_seen = 1;
+               }
+       }
+       begin = store->parsed[i].begin;
+
+       /*
+        * Next, make sure that we are removing he last key(s) in the section,
+        * and that there are no comments that are possibly about the current
+        * section.
+        */
+       for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) {
+               enum config_event_t type = store->parsed[i].type;
+
+               if (type == CONFIG_EVENT_COMMENT)
+                       return;
+               if (type == CONFIG_EVENT_SECTION) {
+                       if (store->parsed[i].is_keys_section)
+                               continue;
+                       break;
+               }
+               if (type == CONFIG_EVENT_ENTRY) {
+                       if (++seen < store->seen_nr &&
+                           i == store->seen[seen])
+                               /* We want to remove this entry, too */
+                               continue;
+                       /* There is another entry in this section. */
+                       return;
                }
-       if (offset > 0 && contents[offset-1] == '\\') {
-               offset_ = offset;
-               goto contline;
        }
-       if (bracket_offset < equal_offset) {
-               *found_bracket = 1;
-               offset = bracket_offset+1;
-       } else
-               offset++;
 
-       return offset;
+       /*
+        * We are really removing the last entry/entries from this section, and
+        * there are no enclosed or surrounding comments. Remove the entire,
+        * now-empty section.
+        */
+       *seen_ptr = seen;
+       *begin_offset = begin;
+       if (i < store->parsed_nr)
+               *end_offset = store->parsed[i].begin;
+       else
+               *end_offset = store->parsed[store->parsed_nr - 1].end;
 }
 
 int git_config_set_in_file_gently(const char *config_filename,
@@ -2613,6 +2698,7 @@ int git_config_set_multivar_in_file_gently(const char *config_filename,
                struct stat st;
                size_t copy_begin, copy_end;
                int i, new_line = 0;
+               struct config_options opts;
 
                if (value_regex == NULL)
                        store.value_regex = NULL;
@@ -2635,17 +2721,24 @@ int git_config_set_multivar_in_file_gently(const char *config_filename,
                        }
                }
 
-               ALLOC_GROW(store.seen, 1, store.seen_alloc);
-               store.seen[0] = 0;
-               store.seen_nr = 0;
+               ALLOC_GROW(store.parsed, 1, store.parsed_alloc);
+               store.parsed[0].end = 0;
+
+               memset(&opts, 0, sizeof(opts));
+               opts.event_fn = store_aux_event;
+               opts.event_fn_data = &store;
 
                /*
-                * After this, store.offset will contain the *end* offset
-                * of the last match, or remain at 0 if no match was found.
+                * After this, store.parsed will contain offsets of all the
+                * parsed elements, and store.seen will contain a list of
+                * matches, as indices into store.parsed.
+                *
                 * As a side effect, we make sure to transform only a valid
                 * existing config file.
                 */
-               if (git_config_from_file(store_aux, config_filename, &store)) {
+               if (git_config_from_file_with_options(store_aux,
+                                                     config_filename,
+                                                     &store, &opts)) {
                        error("invalid config file %s", config_filename);
                        free(store.key);
                        if (store.value_regex != NULL &&
@@ -2697,19 +2790,49 @@ int git_config_set_multivar_in_file_gently(const char *config_filename,
                        goto out_free;
                }
 
-               if (store.seen_nr == 0)
+               if (store.seen_nr == 0) {
+                       if (!store.seen_alloc) {
+                               /* Did not see key nor section */
+                               ALLOC_GROW(store.seen, 1, store.seen_alloc);
+                               store.seen[0] = store.parsed_nr
+                                       - !!store.parsed_nr;
+                       }
                        store.seen_nr = 1;
+               }
 
                for (i = 0, copy_begin = 0; i < store.seen_nr; i++) {
+                       size_t replace_end;
+                       int j = store.seen[i];
+
                        new_line = 0;
-                       if (store.seen[i] == 0) {
-                               store.seen[i] = copy_end = contents_sz;
-                       } else if (!store.key_seen) {
-                               copy_end = store.seen[i];
-                       } else
-                               copy_end = find_beginning_of_line(
-                                       contents, contents_sz,
-                                       store.seen[i], &new_line);
+                       if (!store.key_seen) {
+                               copy_end = store.parsed[j].end;
+                               /* include '\n' when copying section header */
+                               if (copy_end > 0 && copy_end < contents_sz &&
+                                   contents[copy_end - 1] != '\n' &&
+                                   contents[copy_end] == '\n')
+                                       copy_end++;
+                               replace_end = copy_end;
+                       } else {
+                               replace_end = store.parsed[j].end;
+                               copy_end = store.parsed[j].begin;
+                               if (!value)
+                                       maybe_remove_section(&store, contents,
+                                                            &copy_end,
+                                                            &replace_end, &i);
+                               /*
+                                * Swallow preceding white-space on the same
+                                * line.
+                                */
+                               while (copy_end > 0 ) {
+                                       char c = contents[copy_end - 1];
+
+                                       if (isspace(c) && c != '\n')
+                                               copy_end--;
+                                       else
+                                               break;
+                               }
+                       }
 
                        if (copy_end > 0 && contents[copy_end-1] != '\n')
                                new_line = 1;
@@ -2723,7 +2846,7 @@ int git_config_set_multivar_in_file_gently(const char *config_filename,
                                    write_str_in_full(fd, "\n") < 0)
                                        goto write_err_out;
                        }
-                       copy_begin = store.seen[i];
+                       copy_begin = replace_end;
                }
 
                /* write the pair (value == NULL means unset) */