From cd94c6f91ee92ffb0592696170fa84f426b839ab Mon Sep 17 00:00:00 2001 From: Johannes Schindelin Date: Mon, 22 Jun 2015 17:27:18 +0200 Subject: fsck: git receive-pack: support excluding objects from fsck'ing The optional new config option `receive.fsck.skipList` specifies the path to a file listing the names, i.e. SHA-1s, one per line, of objects that are to be ignored by `git receive-pack` when `receive.fsckObjects = true`. This is extremely handy in case of legacy repositories where it would cause more pain to change incorrect objects than to live with them (e.g. a duplicate 'author' line in an early commit object). The intended use case is for server administrators to inspect objects that are reported by `git push` as being too problematic to enter the repository, and to add the objects' SHA-1 to a (preferably sorted) file when the objects are legitimate, i.e. when it is determined that those problematic objects should be allowed to enter the server. Signed-off-by: Johannes Schindelin Signed-off-by: Junio C Hamano diff --git a/Documentation/config.txt b/Documentation/config.txt index 1c65767..f6cbd6d 100644 --- a/Documentation/config.txt +++ b/Documentation/config.txt @@ -2222,6 +2222,14 @@ which would not pass pushing when `receive.fsckObjects = true`, allowing the host to accept repositories with certain known issues but still catch other issues. +receive.fsck.skipList:: + The path to a sorted list of object names (i.e. one SHA-1 per + line) that are known to be broken in a non-fatal way and should + be ignored. This feature is useful when an established project + should be accepted despite early commits containing errors that + can be safely ignored such as invalid committer email addresses. + Note: corrupt objects cannot be skipped with this setting. + receive.unpackLimit:: If the number of objects received in a push is below this limit then the objects will be unpacked into loose object diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c index 3afe8f8..4ced2eb 100644 --- a/builtin/receive-pack.c +++ b/builtin/receive-pack.c @@ -117,6 +117,17 @@ static int receive_pack_config(const char *var, const char *value, void *cb) return 0; } + if (strcmp(var, "receive.fsck.skiplist") == 0) { + const char *path; + + if (git_config_pathname(&path, var, value)) + return 1; + strbuf_addf(&fsck_msg_types, "%cskiplist=%s", + fsck_msg_types.len ? ',' : '=', path); + free((char *)path); + return 0; + } + if (skip_prefix(var, "receive.fsck.", &var)) { if (is_valid_msg_type(var, value)) strbuf_addf(&fsck_msg_types, "%c%s=%s", diff --git a/fsck.c b/fsck.c index 7a614bb..1523243 100644 --- a/fsck.c +++ b/fsck.c @@ -8,6 +8,7 @@ #include "fsck.h" #include "refs.h" #include "utf8.h" +#include "sha1-array.h" #define FSCK_FATAL -1 #define FSCK_INFO -2 @@ -127,6 +128,43 @@ static int fsck_msg_type(enum fsck_msg_id msg_id, return msg_type; } +static void init_skiplist(struct fsck_options *options, const char *path) +{ + static struct sha1_array skiplist = SHA1_ARRAY_INIT; + int sorted, fd; + char buffer[41]; + unsigned char sha1[20]; + + if (options->skiplist) + sorted = options->skiplist->sorted; + else { + sorted = 1; + options->skiplist = &skiplist; + } + + fd = open(path, O_RDONLY); + if (fd < 0) + die("Could not open skip list: %s", path); + for (;;) { + int result = read_in_full(fd, buffer, sizeof(buffer)); + if (result < 0) + die_errno("Could not read '%s'", path); + if (!result) + break; + if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n') + die("Invalid SHA-1: %s", buffer); + sha1_array_append(&skiplist, sha1); + if (sorted && skiplist.nr > 1 && + hashcmp(skiplist.sha1[skiplist.nr - 2], + sha1) > 0) + sorted = 0; + } + close(fd); + + if (sorted) + skiplist.sorted = 1; +} + static int parse_msg_type(const char *str) { if (!strcmp(str, "error")) @@ -191,6 +229,14 @@ void fsck_set_msg_types(struct fsck_options *options, const char *values) buf[equal] = tolower(buf[equal]); buf[equal] = '\0'; + if (!strcmp(buf, "skiplist")) { + if (equal == len) + die("skiplist requires a path"); + init_skiplist(options, buf + equal + 1); + buf += len + 1; + continue; + } + if (equal == len) die("Missing '=': '%s'", buf); @@ -229,6 +275,10 @@ static int report(struct fsck_options *options, struct object *object, if (msg_type == FSCK_IGNORE) return 0; + if (options->skiplist && object && + sha1_array_lookup(options->skiplist, object->sha1) >= 0) + return 0; + if (msg_type == FSCK_FATAL) msg_type = FSCK_ERROR; else if (msg_type == FSCK_INFO) diff --git a/fsck.h b/fsck.h index 1dab276..dded84b 100644 --- a/fsck.h +++ b/fsck.h @@ -32,6 +32,7 @@ struct fsck_options { fsck_error error_func; unsigned strict:1; int *msg_type; + struct sha1_array *skiplist; }; #define FSCK_OPTIONS_DEFAULT { NULL, fsck_error_function, 0, NULL } diff --git a/t/t5504-fetch-receive-strict.sh b/t/t5504-fetch-receive-strict.sh index 720c121..44f3d5f 100755 --- a/t/t5504-fetch-receive-strict.sh +++ b/t/t5504-fetch-receive-strict.sh @@ -123,6 +123,18 @@ committer Bugs Bunny 1234567890 +0000 This commit object intentionally broken EOF +test_expect_success 'push with receive.fsck.skipList' ' + commit="$(git hash-object -t commit -w --stdin dst/.git/SKIP && + git push --porcelain dst bogus +' + test_expect_success 'push with receive.fsck.missingEmail=warn' ' commit="$(git hash-object -t commit -w --stdin