[PATCH v3 0/2] index-pack: fsck honor checks

git-index-pack has a --strict mode that can take an optional argument to provide a list of fsck issues to change their severity. --fsck-objects does not have such a utility, which would be useful if one would like to be more lenient or strict on data integrity in a repository.

Like --strict, Allow --fsck-objects to also take a list of fsck msgs to change the severity.

Changes since V2:

 * fixed some typos in the documentation
 * added commit trailers

Change since V1:

 * edited commit messages
 * clarified formatting in documentation for --strict= and --fsck-objects=

John Cai (2):
  index-pack: test and document --strict=<msg-id>=<severity>...
  index-pack: --fsck-objects to take an optional argument for fsck msgs

 Documentation/git-index-pack.txt | 26 +++++++++++++-------
 builtin/index-pack.c             |  5 ++--
 t/t5300-pack-object.sh           | 41 ++++++++++++++++++++++++++++++++
 3 files changed, 62 insertions(+), 10 deletions(-)

base-commit: 186b115d3062e6230ee296d1ddaa0c4b72a464b5
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1658%2Fjohn-cai%2Fjc%2Findex-pack-fsck-honor-checks-v3
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1658/john-cai/jc/index-pack-fsck-honor-checks-v3
Pull-Request: https://github.com/git/git/pull/1658

Range-diff vs v2:

 1:  b3b3e8bd0bf ! 1:  cdf7fc7fe8a index-pack: test and document --strict=<msg>
     @@ Metadata
      Author: John Cai <johncai86@gmail.com>
      
       ## Commit message ##
     -    index-pack: test and document --strict=<msg>
     +    index-pack: test and document --strict=<msg-id>=<severity>...
      
          5d477a334a (fsck (receive-pack): allow demoting errors to warnings,
          2015-06-22) allowed a list of fsck msg to downgrade to be passed to
     @@ Commit message
          directly, (nor use index-pack for that matter) it is still useful to
          document and test this feature.
      
     +    Reviewed-by: Christian Couder <christian.couder@gmail.com>
          Signed-off-by: John Cai <johncai86@gmail.com>
      
       ## Documentation/git-index-pack.txt ##
     @@ Documentation/git-index-pack.txt: OPTIONS
      ---strict::
      -	Die, if the pack contains broken objects or links.
      +--strict[=<msg-id>=<severity>...]::
     -+	Die, if the pack contains broken objects or links. If `<msg-ids>` is passed,
     -+	it should be a comma-separated list of `<msg-id>=<severity>` elements where
     -+	`<msg-id>` and `<severity>` are used to change the severity of some possible
     -+	issues, e.g., `--strict="missingEmail=ignore,badTagName=error"`. See the entry
     -+	for the `fsck.<msg-id>` configuration options in `linkgit:git-fsck[1] for
     -+	more information on the possible values of `<msg-id>` and `<severity>`.
     ++	Die, if the pack contains broken objects or links. An optional
     ++	comma-separated list of `<msg-id>=<severity>` can be passed to change
     ++	the severity of some possible issues, e.g.,
     ++	 `--strict="missingEmail=ignore,badTagName=error"`. See the entry for the
     ++	`fsck.<msg-id>` configuration options in linkgit:git-fsck[1] for more
     ++	information on the possible values of `<msg-id>` and `<severity>`.
       
       --progress-title::
       	For internal use only.
     @@ builtin/index-pack.c
       
       static const char index_pack_usage[] =
      -"git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--[no-]rev-index] [--verify] [--strict] (<pack-file> | --stdin [--fix-thin] [<pack-file>])";
     -+"git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--[no-]rev-index] [--verify] [--strict[=<msg-ids>]] (<pack-file> | --stdin [--fix-thin] [<pack-file>])";
     ++"git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--[no-]rev-index] [--verify] [--strict[=<msg-id>=<severity>...]] (<pack-file> | --stdin [--fix-thin] [<pack-file>])";
       
       struct object_entry {
       	struct pack_idx_entry idx;
 2:  cce63c6465f ! 2:  a2b9adb93d8 index-pack: --fsck-objects to take an optional argument for fsck msgs
     @@ Commit message
          the option. This won't often be used by the normal end user, but it
          turns out it is useful for Git forges like GitLab.
      
     +    Reviewed-by: Christian Couder <christian.couder@gmail.com>
          Signed-off-by: John Cai <johncai86@gmail.com>
      
       ## Documentation/git-index-pack.txt ##
     @@ Documentation/git-index-pack.txt: default and "Indexing objects" when `--stdin`
       
      ---fsck-objects::
      -	For internal use only.
     -+--fsck-objects[=<msg-ids>=<severity>...]::
     -+	Instructs index-pack to check for broken objects, but unlike `--strict`,
     -+	does not choke on broken links. If `<msg-ids>` is passed, it should be
     -+	a comma-separated list of `<msg-id>=<severity>` where `<msg-id>` and
     -+	`<severity>` are used to change the severity of `fsck` errors e.g.,
     -+	`--strict="missingEmail=ignore,badTagName=ignore"`. See the entry for
     -+	the `fsck.<msg-id>` configuration options in `linkgit:git-fsck[1] for
     -+	more information on the possible values of `<msg-id>` and `<severity>`.
     ++--fsck-objects[=<msg-id>=<severity>...]::
     ++	Die if the pack contains broken objects. If the pack contains a tree
     ++	pointing to a .gitmodules blob that does not exist, prints the hash of
     ++	that blob (for the caller to check) after the hash that goes into the
     ++	name of the pack/idx file (see "Notes").
       +
     - Die if the pack contains broken objects. If the pack contains a tree
     - pointing to a .gitmodules blob that does not exist, prints the hash of
     +-Die if the pack contains broken objects. If the pack contains a tree
     +-pointing to a .gitmodules blob that does not exist, prints the hash of
     +-that blob (for the caller to check) after the hash that goes into the
     +-name of the pack/idx file (see "Notes").
     ++Unlike `--strict` however, don't choke on broken links. An optional
     ++comma-separated list of `<msg-id>=<severity>` can be passed to change the
     ++severity of some possible issues, e.g.,
     ++`--fsck-objects="missingEmail=ignore,badTagName=ignore"`. See the entry for the
     ++`fsck.<msg-id>` configuration options in linkgit:git-fsck[1] for more
     ++information on the possible values of `<msg-id>` and `<severity>`.
     + 
     + --threads=<n>::
     + 	Specifies the number of threads to spawn when resolving
      
       ## builtin/index-pack.c ##
      @@
       #include "setup.h"
       
       static const char index_pack_usage[] =
     --"git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--[no-]rev-index] [--verify] [--strict[=<msg-ids>]] (<pack-file> | --stdin [--fix-thin] [<pack-file>])";
     -+"git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--[no-]rev-index] [--verify] [--strict[=<msg-ids>]] [--fsck-objects[=<msg-ids>]] (<pack-file> | --stdin [--fix-thin] [<pack-file>])";
     +-"git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--[no-]rev-index] [--verify] [--strict[=<msg-id>=<severity>...]] (<pack-file> | --stdin [--fix-thin] [<pack-file>])";
     ++"git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--[no-]rev-index] [--verify] [--strict[=<msg-id>=<severity>...]] [--fsck-objects[=<msg-id>=<severity>...]] (<pack-file> | --stdin [--fix-thin] [<pack-file>])";
       
       struct object_entry {
       	struct pack_idx_entry idx;