diff options
| -rw-r--r-- | Documentation/git-config.txt | 7 | ||||
| -rw-r--r-- | builtin/config.c | 31 | ||||
| -rw-r--r-- | cache.h | 6 | ||||
| -rw-r--r-- | config.c | 86 | ||||
| -rwxr-xr-x | t/t1307-config-blob.sh | 70 |
5 files changed, 193 insertions, 7 deletions
diff --git a/Documentation/git-config.txt b/Documentation/git-config.txt index 9ae2508..f0e179e 100644 --- a/Documentation/git-config.txt +++ b/Documentation/git-config.txt @@ -118,6 +118,13 @@ See also <<FILES>>. --file config-file:: Use the given config file instead of the one specified by GIT_CONFIG. +--blob blob:: + Similar to '--file' but use the given blob instead of a file. E.g. + you can use 'master:.gitmodules' to read values from the file + '.gitmodules' in the master branch. See "SPECIFYING REVISIONS" + section in linkgit:gitrevisions[7] for a more complete list of + ways to spell blob names. + --remove-section:: Remove the given section from the configuration file. diff --git a/builtin/config.c b/builtin/config.c index 33c9bf9..8d01b7a 100644 --- a/builtin/config.c +++ b/builtin/config.c @@ -21,6 +21,7 @@ static char term = '\n'; static int use_global_config, use_system_config, use_local_config; static const char *given_config_file; +static const char *given_config_blob; static int actions, types; static const char *get_color_slot, *get_colorbool_slot; static int end_null; @@ -53,6 +54,7 @@ static struct option builtin_config_options[] = { OPT_BOOLEAN(0, "system", &use_system_config, N_("use system config file")), OPT_BOOLEAN(0, "local", &use_local_config, N_("use repository config file")), OPT_STRING('f', "file", &given_config_file, N_("file"), N_("use given config file")), + OPT_STRING(0, "blob", &given_config_blob, N_("blob-id"), N_("read config from given blob object")), OPT_GROUP(N_("Action")), OPT_BIT(0, "get", &actions, N_("get value: name [value-regex]"), ACTION_GET), OPT_BIT(0, "get-all", &actions, N_("get all values: key [value-regex]"), ACTION_GET_ALL), @@ -218,7 +220,8 @@ static int get_value(const char *key_, const char *regex_) } git_config_with_options(collect_config, &values, - given_config_file, respect_includes); + given_config_file, given_config_blob, + respect_includes); ret = !values.nr; @@ -302,7 +305,8 @@ static void get_color(const char *def_color) get_color_found = 0; parsed_color[0] = '\0'; git_config_with_options(git_get_color_config, NULL, - given_config_file, respect_includes); + given_config_file, given_config_blob, + respect_includes); if (!get_color_found && def_color) color_parse(def_color, "command line", parsed_color); @@ -330,7 +334,8 @@ static int get_colorbool(int print) get_colorbool_found = -1; get_diff_color_found = -1; git_config_with_options(git_get_colorbool_config, NULL, - given_config_file, respect_includes); + given_config_file, given_config_blob, + respect_includes); if (get_colorbool_found < 0) { if (!strcmp(get_colorbool_slot, "color.diff")) @@ -348,6 +353,12 @@ static int get_colorbool(int print) return get_colorbool_found ? 0 : 1; } +static void check_blob_write(void) +{ + if (given_config_blob) + die("writing config blobs is not supported"); +} + int cmd_config(int argc, const char **argv, const char *prefix) { int nongit = !startup_info->have_repository; @@ -359,7 +370,8 @@ int cmd_config(int argc, const char **argv, const char *prefix) builtin_config_usage, PARSE_OPT_STOP_AT_NON_OPTION); - if (use_global_config + use_system_config + use_local_config + !!given_config_file > 1) { + if (use_global_config + use_system_config + use_local_config + + !!given_config_file + !!given_config_blob > 1) { error("only one config file at a time."); usage_with_options(builtin_config_usage, builtin_config_options); } @@ -438,6 +450,7 @@ int cmd_config(int argc, const char **argv, const char *prefix) check_argc(argc, 0, 0); if (git_config_with_options(show_all_config, NULL, given_config_file, + given_config_blob, respect_includes) < 0) { if (given_config_file) die_errno("unable to read config file '%s'", @@ -450,6 +463,8 @@ int cmd_config(int argc, const char **argv, const char *prefix) check_argc(argc, 0, 0); if (!given_config_file && nongit) die("not in a git directory"); + if (given_config_blob) + die("editing blobs is not supported"); git_config(git_default_config, NULL); launch_editor(given_config_file ? given_config_file : git_path("config"), @@ -457,6 +472,7 @@ int cmd_config(int argc, const char **argv, const char *prefix) } else if (actions == ACTION_SET) { int ret; + check_blob_write(); check_argc(argc, 2, 2); value = normalize_value(argv[0], argv[1]); ret = git_config_set_in_file(given_config_file, argv[0], value); @@ -466,18 +482,21 @@ int cmd_config(int argc, const char **argv, const char *prefix) return ret; } else if (actions == ACTION_SET_ALL) { + check_blob_write(); check_argc(argc, 2, 3); value = normalize_value(argv[0], argv[1]); return git_config_set_multivar_in_file(given_config_file, argv[0], value, argv[2], 0); } else if (actions == ACTION_ADD) { + check_blob_write(); check_argc(argc, 2, 2); value = normalize_value(argv[0], argv[1]); return git_config_set_multivar_in_file(given_config_file, argv[0], value, "^$", 0); } else if (actions == ACTION_REPLACE_ALL) { + check_blob_write(); check_argc(argc, 2, 3); value = normalize_value(argv[0], argv[1]); return git_config_set_multivar_in_file(given_config_file, @@ -500,6 +519,7 @@ int cmd_config(int argc, const char **argv, const char *prefix) return get_value(argv[0], argv[1]); } else if (actions == ACTION_UNSET) { + check_blob_write(); check_argc(argc, 1, 2); if (argc == 2) return git_config_set_multivar_in_file(given_config_file, @@ -509,12 +529,14 @@ int cmd_config(int argc, const char **argv, const char *prefix) argv[0], NULL); } else if (actions == ACTION_UNSET_ALL) { + check_blob_write(); check_argc(argc, 1, 2); return git_config_set_multivar_in_file(given_config_file, argv[0], NULL, argv[1], 1); } else if (actions == ACTION_RENAME_SECTION) { int ret; + check_blob_write(); check_argc(argc, 2, 2); ret = git_config_rename_section_in_file(given_config_file, argv[0], argv[1]); @@ -525,6 +547,7 @@ int cmd_config(int argc, const char **argv, const char *prefix) } else if (actions == ACTION_REMOVE_SECTION) { int ret; + check_blob_write(); check_argc(argc, 1, 1); ret = git_config_rename_section_in_file(given_config_file, argv[0], NULL); @@ -1142,11 +1142,15 @@ extern int update_server_info(int); typedef int (*config_fn_t)(const char *, const char *, void *); extern int git_default_config(const char *, const char *, void *); extern int git_config_from_file(config_fn_t fn, const char *, void *); +extern int git_config_from_buf(config_fn_t fn, const char *name, + const char *buf, size_t len, void *data); extern void git_config_push_parameter(const char *text); extern int git_config_from_parameters(config_fn_t fn, void *data); extern int git_config(config_fn_t fn, void *); extern int git_config_with_options(config_fn_t fn, void *, - const char *filename, int respect_includes); + const char *filename, + const char *blob_ref, + int respect_includes); extern int git_config_early(config_fn_t fn, void *, const char *repo_config); extern int git_parse_ulong(const char *, unsigned long *); extern int git_config_int(const char *, const char *); @@ -14,6 +14,11 @@ struct config_source { struct config_source *prev; union { FILE *file; + struct config_buf { + const char *buf; + size_t len; + size_t pos; + } buf; } u; const char *name; int linenr; @@ -45,6 +50,28 @@ static long config_file_ftell(struct config_source *conf) return ftell(conf->u.file); } + +static int config_buf_fgetc(struct config_source *conf) +{ + if (conf->u.buf.pos < conf->u.buf.len) + return conf->u.buf.buf[conf->u.buf.pos++]; + + return EOF; +} + +static int config_buf_ungetc(int c, struct config_source *conf) +{ + if (conf->u.buf.pos > 0) + return conf->u.buf.buf[--conf->u.buf.pos]; + + return EOF; +} + +static long config_buf_ftell(struct config_source *conf) +{ + return conf->u.buf.pos; +} + #define MAX_INCLUDE_DEPTH 10 static const char include_depth_advice[] = "exceeded maximum include depth (%d) while including\n" @@ -961,6 +988,57 @@ int git_config_from_file(config_fn_t fn, const char *filename, void *data) return ret; } +int git_config_from_buf(config_fn_t fn, const char *name, const char *buf, + size_t len, void *data) +{ + struct config_source top; + + top.u.buf.buf = buf; + top.u.buf.len = len; + top.u.buf.pos = 0; + top.name = name; + top.fgetc = config_buf_fgetc; + top.ungetc = config_buf_ungetc; + top.ftell = config_buf_ftell; + + return do_config_from(&top, fn, data); +} + +static int git_config_from_blob_sha1(config_fn_t fn, + const char *name, + const unsigned char *sha1, + void *data) +{ + enum object_type type; + char *buf; + unsigned long size; + int ret; + + buf = read_sha1_file(sha1, &type, &size); + if (!buf) + return error("unable to load config blob object '%s'", name); + if (type != OBJ_BLOB) { + free(buf); + return error("reference '%s' does not point to a blob", name); + } + + ret = git_config_from_buf(fn, name, buf, size, data); + free(buf); + + return ret; +} + +static int git_config_from_blob_ref(config_fn_t fn, + const char *name, + void *data) +{ + unsigned char sha1[20]; + + if (get_sha1(name, sha1) < 0) + return error("unable to resolve config blob '%s'", name); + return git_config_from_blob_sha1(fn, name, sha1, data); +} + const char *git_etc_gitconfig(void) { static const char *system_wide; @@ -1026,7 +1104,9 @@ int git_config_early(config_fn_t fn, void *data, const char *repo_config) } int git_config_with_options(config_fn_t fn, void *data, - const char *filename, int respect_includes) + const char *filename, + const char *blob_ref, + int respect_includes) { char *repo_config = NULL; int ret; @@ -1045,6 +1125,8 @@ int git_config_with_options(config_fn_t fn, void *data, */ if (filename) return git_config_from_file(fn, filename, data); + else if (blob_ref) + return git_config_from_blob_ref(fn, blob_ref, data); repo_config = git_pathdup("config"); ret = git_config_early(fn, data, repo_config); @@ -1055,7 +1137,7 @@ int git_config_with_options(config_fn_t fn, void *data, int git_config(config_fn_t fn, void *data) { - return git_config_with_options(fn, data, NULL, 1); + return git_config_with_options(fn, data, NULL, NULL, 1); } /* diff --git a/t/t1307-config-blob.sh b/t/t1307-config-blob.sh new file mode 100755 index 0000000..fdc257e --- /dev/null +++ b/t/t1307-config-blob.sh @@ -0,0 +1,70 @@ +#!/bin/sh + +test_description='support for reading config from a blob' +. ./test-lib.sh + +test_expect_success 'create config blob' ' + cat >config <<-\EOF && + [some] + value = 1 + EOF + git add config && + git commit -m foo +' + +test_expect_success 'list config blob contents' ' + echo some.value=1 >expect && + git config --blob=HEAD:config --list >actual && + test_cmp expect actual +' + +test_expect_success 'fetch value from blob' ' + echo true >expect && + git config --blob=HEAD:config --bool some.value >actual && + test_cmp expect actual +' + +test_expect_success 'reading non-existing value from blob is an error' ' + test_must_fail git config --blob=HEAD:config non.existing +' + +test_expect_success 'reading from blob and file is an error' ' + test_must_fail git config --blob=HEAD:config --system --list +' + +test_expect_success 'reading from missing ref is an error' ' + test_must_fail git config --blob=HEAD:doesnotexist --list +' + +test_expect_success 'reading from non-blob is an error' ' + test_must_fail git config --blob=HEAD --list +' + +test_expect_success 'setting a value in a blob is an error' ' + test_must_fail git config --blob=HEAD:config some.value foo +' + +test_expect_success 'deleting a value in a blob is an error' ' + test_must_fail git config --blob=HEAD:config --unset some.value +' + +test_expect_success 'editing a blob is an error' ' + test_must_fail git config --blob=HEAD:config --edit +' + +test_expect_success 'parse errors in blobs are properly attributed' ' + cat >config <<-\EOF && + [some] + value = " + EOF + git add config && + git commit -m broken && + + test_must_fail git config --blob=HEAD:config some.value 2>err && + + # just grep for our token as the exact error message is likely to + # change or be internationalized + grep "HEAD:config" err +' + +test_done |