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git storage: significantly expand logging to stderr

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In many cases we did not log the issues the code ran into to stderr which made
remote debugging user problems much harder. This hopefully will help with that.

Since I was looking at the code, I also made the existing messages more
consistent.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Dirk Hohndel 2020-06-13 10:46:09 -07:00
parent 23e8839182
commit fe9e33ccac
1 changed files with 67 additions and 42 deletions
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109
core/git-access.c
View file

@ -160,10 +160,11 @@ static int check_clean(const char *path, unsigned int status, void *payload)
status &= ~GIT_STATUS_CURRENT | GIT_STATUS_IGNORED;
if (!status)
return 0;
SSRF_INFO("git storage: local cache dir %s modified, git status 0x%04x", path, status);
if (is_subsurface_cloud)
report_error(translate("gettextFromC", "Local cache directory %s corrupted - can't sync with Subsurface cloud storage"), path);
else
report_error("WARNING: Git cache directory modified (path %s) status %0x", path, status);
report_error("WARNING: Git cache directory modified (path %s) status 0x%04x", path, status);
return 1;
}
@ -183,9 +184,10 @@ static int reset_to_remote(git_repository *repo, git_reference *local, const git
if (git_repository_is_bare(repo) || git_branch_is_head(local) != 1) {
git_reference *out;
if (git_reference_set_target(&out, local, new_id, "Update to remote"))
if (git_reference_set_target(&out, local, new_id, "Update to remote")) {
SSRF_INFO("git storage: could not update local cache to newer remote data");
return report_error(translate("gettextFromC", "Could not update local cache to newer remote data"));
}
git_reference_free(out);
#ifdef DEBUG
@ -196,6 +198,7 @@ static int reset_to_remote(git_repository *repo, git_reference *local, const git
}
if (git_object_lookup(&target, repo, new_id, GIT_OBJ_COMMIT)) {
SSRF_INFO("git storage: could not look up remote commit");
if (is_subsurface_cloud)
return report_error(translate("gettextFromC", "Subsurface cloud storage corrupted"));
else
@ -203,6 +206,7 @@ static int reset_to_remote(git_repository *repo, git_reference *local, const git
}
opts.checkout_strategy = GIT_CHECKOUT_SAFE;
if (git_reset(repo, target, GIT_RESET_HARD, &opts)) {
SSRF_INFO("git storage: local head checkout failed after update");
if (is_subsurface_cloud)
return report_error(translate("gettextFromC", "Could not update local cache to newer remote data"));
else
@ -221,6 +225,7 @@ static const int max_auth_attempts = 2;
static bool exceeded_auth_attempts()
{
if (auth_attempt++ > max_auth_attempts) {
SSRF_INFO("git storage: authentication to cloud storage failed");
report_error("Authentication to cloud storage failed.");
return true;
}
@ -290,7 +295,7 @@ int certificate_check_cb(git_cert *cert, int valid, const char *host, void *payl
{
UNUSED(payload);
if (verbose)
SSRF_INFO("certificate callback for host %s with validity %d\n", host, valid);
SSRF_INFO("git storage: certificate callback for host %s with validity %d\n", host, valid);
if (same_string(host, "cloud.subsurface-divelog.org") && cert->cert_type == GIT_CERT_X509) {
// for some reason the LetsEncrypt certificate makes libgit2 throw up on some
// platforms but not on others
@ -326,10 +331,12 @@ static int update_remote(git_repository *repo, git_remote *origin, git_reference
opts.callbacks.certificate_check = certificate_check_cb;
if (git_remote_push(origin, &refspec, &opts)) {
const char *msg = giterr_last()->message;
SSRF_INFO("git storage: unable to update remote with current local cache state, error: %s", msg);
if (is_subsurface_cloud)
return report_error(translate("gettextFromC", "Could not update Subsurface cloud storage, try again later"));
else
return report_error("Unable to update remote with current local cache state (%s)", giterr_last()->message);
return report_error("Unable to update remote with current local cache state (%s)", msg);
}
return 0;
}
@ -350,7 +357,7 @@ static int try_to_git_merge(git_repository *repo, git_reference **local_p, git_r
outlocal[40] = outremote[40] = 0;
git_oid_fmt(outlocal, local_id);
git_oid_fmt(outremote, remote_id);
SSRF_INFO("trying to merge local SHA %s remote SHA %s\n", outlocal, outremote);
SSRF_INFO("git storage: trying to merge local SHA %s remote SHA %s\n", outlocal, outremote);
}
git_merge_init_options(&merge_options, GIT_MERGE_OPTIONS_VERSION);
@ -358,31 +365,31 @@ static int try_to_git_merge(git_repository *repo, git_reference **local_p, git_r
merge_options.file_favor = GIT_MERGE_FILE_FAVOR_UNION;
merge_options.rename_threshold = 100;
if (git_commit_lookup(&local_commit, repo, local_id)) {
SSRF_INFO("Remote storage and local data diverged. Error: can't get commit (%s)", giterr_last()->message);
SSRF_INFO("git storage: remote storage and local data diverged. Error: can't get commit (%s)", giterr_last()->message);
goto diverged_error;
}
if (git_commit_tree(&local_tree, local_commit)) {
SSRF_INFO("Remote storage and local data diverged. Error: failed local tree lookup (%s)", giterr_last()->message);
SSRF_INFO("git storage: remote storage and local data diverged. Error: failed local tree lookup (%s)", giterr_last()->message);
goto diverged_error;
}
if (git_commit_lookup(&remote_commit, repo, remote_id)) {
SSRF_INFO("Remote storage and local data diverged. Error: can't get commit (%s)", giterr_last()->message);
SSRF_INFO("git storage: remote storage and local data diverged. Error: can't get commit (%s)", giterr_last()->message);
goto diverged_error;
}
if (git_commit_tree(&remote_tree, remote_commit)) {
SSRF_INFO("Remote storage and local data diverged. Error: failed local tree lookup (%s)", giterr_last()->message);
SSRF_INFO("git storage: remote storage and local data diverged. Error: failed local tree lookup (%s)", giterr_last()->message);
goto diverged_error;
}
if (git_commit_lookup(&base_commit, repo, base)) {
SSRF_INFO("Remote storage and local data diverged. Error: can't get commit (%s)", giterr_last()->message);
SSRF_INFO("git storage: remote storage and local data diverged. Error: can't get commit (%s)", giterr_last()->message);
goto diverged_error;
}
if (git_commit_tree(&base_tree, base_commit)) {
SSRF_INFO("Remote storage and local data diverged. Error: failed base tree lookup (%s)", giterr_last()->message);
SSRF_INFO("git storage: remote storage and local data diverged. Error: failed base tree lookup (%s)", giterr_last()->message);
goto diverged_error;
}
if (git_merge_trees(&merged_index, repo, base_tree, local_tree, remote_tree, &merge_options)) {
SSRF_INFO("Remote storage and local data diverged. Error: merge failed (%s)", giterr_last()->message);
SSRF_INFO("git storage: remote storage and local data diverged. Error: merge failed (%s)", giterr_last()->message);
// this is the one where I want to report more detail to the user - can't quite explain why
return report_error(translate("gettextFromC", "Remote storage and local data diverged. Error: merge failed (%s)"), giterr_last()->message);
}
@ -396,20 +403,20 @@ static int try_to_git_merge(git_repository *repo, git_reference **local_p, git_r
while (git_index_conflict_next(&ancestor, &ours, &theirs, iter)
!= GIT_ITEROVER) {
/* Mark this conflict as resolved */
SSRF_INFO("conflict in %s / %s / %s -- ",
SSRF_INFO("git storage: conflict in %s / %s / %s -- ",
ours ? ours->path : "-",
theirs ? theirs->path : "-",
ancestor ? ancestor->path : "-");
if ((!ours && theirs && ancestor) ||
(ours && !theirs && ancestor)) {
// the file was removed on one side or the other - just remove it
SSRF_INFO("looks like a delete on one side; removing the file from the index\n");
SSRF_INFO("git storage: looks like a delete on one side; removing the file from the index\n");
error = git_index_remove(merged_index, ours ? ours->path : theirs->path, GIT_INDEX_STAGE_ANY);
} else if (ancestor) {
error = git_index_conflict_remove(merged_index, ours ? ours->path : theirs ? theirs->path : ancestor->path);
}
if (error) {
SSRF_INFO("error at conflict resplution (%s)", giterr_last()->message);
SSRF_INFO("git storage: error at conflict resolution (%s)", giterr_last()->message);
}
}
git_index_conflict_cleanup(merged_index);
@ -446,7 +453,7 @@ static int try_to_git_merge(git_repository *repo, git_reference **local_p, git_r
set_git_id(&commit_oid);
git_signature_free(author);
if (verbose)
SSRF_INFO("Successfully merged repositories");
SSRF_INFO("git storage: successfully merged repositories");
free_buffer(&msg);
return 0;
@ -464,11 +471,13 @@ write_error:
static int cleanup_local_cache(const char *remote_url, const char *branch)
{
char *backup_path = move_local_cache(remote_url, branch);
SSRF_INFO("git storage: problems with local cache, moved to %s", backup_path);
report_error(translate("gettextFromC", "Problems with local cache of Subsurface cloud data"));
report_error(translate("gettextFromC", "Moved cache data to %s. Please try the operation again."), backup_path);
free(backup_path);
return -1;
}
static int try_to_update(git_repository *repo, git_remote *origin, git_reference *local, git_reference *remote,
const char *remote_url, const char *branch, enum remote_transport rt)
{
@ -485,6 +494,7 @@ static int try_to_update(git_repository *repo, git_remote *origin, git_reference
// Dirty modified state in the working tree? We're not going
// to update either way
if (git_status_foreach(repo, check_clean, NULL)) {
SSRF_INFO("git storage: local cache is dirty, skipping update");
if (is_subsurface_cloud)
goto cloud_data_error;
else
@ -494,6 +504,8 @@ static int try_to_update(git_repository *repo, git_remote *origin, git_reference
remote_id = git_reference_target(remote);
if (!local_id || !remote_id) {
local_id && SSRF_INFO("git storage: unable to get local SHA");
remote_id && SSRF_INFO("git storage: unable to get remote SHA");
if (is_subsurface_cloud)
goto cloud_data_error;
else
@ -505,6 +517,7 @@ static int try_to_update(git_repository *repo, git_remote *origin, git_reference
// so instead merge this as merging a commit into a repo - git_merge() appears to do that
// but needs testing and cleanup afterwards
//
SSRF_INFO("git storage: no common commit between local and remote branches");
if (is_subsurface_cloud)
goto cloud_data_error;
else
@ -512,6 +525,8 @@ static int try_to_update(git_repository *repo, git_remote *origin, git_reference
}
/* Is the remote strictly newer? Use it */
if (git_oid_equal(&base, local_id)) {
if (verbose)
SSRF_INFO("git storage: remote is newer than local, update local");
git_storage_update_progress(translate("gettextFromC", "Update local storage to match cloud storage"));
return reset_to_remote(repo, local, remote_id);
}
@ -519,12 +534,13 @@ static int try_to_update(git_repository *repo, git_remote *origin, git_reference
/* Is the local repo the more recent one? See if we can update upstream */
if (git_oid_equal(&base, remote_id)) {
if (verbose)
SSRF_INFO("local is newer than remote, update remote\n");
SSRF_INFO("git storage: local is newer than remote, update remote");
git_storage_update_progress(translate("gettextFromC", "Push local changes to cloud storage"));
return update_remote(repo, origin, local, remote, rt);
}
/* Merging a bare repository always needs user action */
if (git_repository_is_bare(repo)) {
SSRF_INFO("git storage: local is bare and has diverged from remote; user action needed");
if (is_subsurface_cloud)
goto cloud_data_error;
else
@ -532,6 +548,7 @@ static int try_to_update(git_repository *repo, git_remote *origin, git_reference
}
/* Merging will definitely need the head branch too */
if (git_branch_is_head(local) != 1) {
SSRF_INFO("git storage: local branch is not HEAD, cannot merge");
if (is_subsurface_cloud)
goto cloud_data_error;
else
@ -562,6 +579,7 @@ static int check_remote_status(git_repository *repo, git_remote *origin, const c
SSRF_INFO("git storage: check remote status\n");
if (git_branch_lookup(&local_ref, repo, branch, GIT_BRANCH_LOCAL)) {
SSRF_INFO("git storage: branch %s is missing in local repo", branch);
if (is_subsurface_cloud)
return cleanup_local_cache(remote, branch);
else
@ -570,6 +588,7 @@ static int check_remote_status(git_repository *repo, git_remote *origin, const c
if (git_branch_upstream(&remote_ref, local_ref)) {
/* so there is no upstream branch for our branch; that's a problem.
* let's push our branch */
SSRF_INFO("git storage: branch %s is missing in remote, pushing branch", branch);
git_strarray refspec;
git_reference_list(&refspec, repo);
git_push_options opts = GIT_PUSH_OPTIONS_INIT;
@ -611,7 +630,7 @@ void delete_remote_branch(git_repository *repo, const char *remote, const char *
git_config_delete_entry(conf, "http.proxy");
}
if (git_remote_lookup(&origin, repo, "origin")) {
SSRF_INFO("Repository '%s' origin lookup failed (%s)", remote, giterr_last() ? giterr_last()->message : "(unspecified)");
SSRF_INFO("git storage: repository '%s' origin lookup failed (%s)", remote, giterr_last() ? giterr_last()->message : "(unspecified)");
return;
}
/* fetch the remote state */
@ -620,7 +639,7 @@ void delete_remote_branch(git_repository *repo, const char *remote, const char *
f_opts.callbacks.credentials = credential_https_cb;
error = git_remote_fetch(origin, NULL, &f_opts, NULL);
if (error) {
SSRF_INFO("remote fetch failed (%s)\n", giterr_last() ? giterr_last()->message : "authentication failed");
SSRF_INFO("git storage: remote fetch failed (%s)\n", giterr_last() ? giterr_last()->message : "authentication failed");
return;
}
/* delete the remote branch by pushing to ":refs/heads/<branch>" */
@ -634,8 +653,8 @@ void delete_remote_branch(git_repository *repo, const char *remote, const char *
error = git_remote_push(origin, &refspec, &p_opts);
free(branch_ref);
if (error) {
SSRF_INFO("Unable to delete branch '%s'", branch);
SSRF_INFO("error was (%s)\n", giterr_last() ? giterr_last()->message : "(unspecified)");
SSRF_INFO("git storage: unable to delete branch '%s'", branch);
SSRF_INFO("git storage: error was (%s)\n", giterr_last() ? giterr_last()->message : "(unspecified)");
}
git_remote_free(origin);
return;
@ -650,21 +669,21 @@ int sync_with_remote(git_repository *repo, const char *remote, const char *branc
if (git_local_only) {
if (verbose)
SSRF_INFO("don't sync with remote - read from cache only\n");
SSRF_INFO("git storage: don't sync with remote - read from cache only\n");
return 0;
}
if (verbose)
SSRF_INFO("sync with remote %s[%s]\n", remote, branch);
SSRF_INFO("git storage: sync with remote %s[%s]\n", remote, branch);
git_storage_update_progress(translate("gettextFromC", "Sync with cloud storage"));
git_repository_config(&conf, repo);
if (rt == RT_HTTPS && getProxyString(&proxy_string)) {
if (verbose)
SSRF_INFO("set proxy to \"%s\"\n", proxy_string);
SSRF_INFO("git storage: set proxy to \"%s\"\n", proxy_string);
git_config_set_string(conf, "http.proxy", proxy_string);
free(proxy_string);
} else {
if (verbose)
SSRF_INFO("delete proxy setting\n");
SSRF_INFO("git storage: delete proxy setting\n");
git_config_delete_entry(conf, "http.proxy");
}
@ -674,13 +693,16 @@ int sync_with_remote(git_repository *repo, const char *remote, const char *branc
*/
error = git_remote_lookup(&origin, repo, "origin");
if (error) {
const char *msg = giterr_last()->message;
SSRF_INFO("git storage: repo %s origin lookup failed with: %s", remote, msg);
if (!is_subsurface_cloud)
report_error("Repository '%s' origin lookup failed (%s)", remote, giterr_last()->message);
report_error("Repository '%s' origin lookup failed (%s)", remote, msg);
return 0;
}
if (is_subsurface_cloud && !canReachCloudServer()) {
// this is not an error, just a warning message, so return 0
SSRF_INFO("git storage: cannot connect to remote server");
report_error("Cannot connect to cloud server, working with local copy");
git_storage_update_progress(translate("gettextFromC", "Can't reach cloud server, working with local data"));
return 0;
@ -703,10 +725,8 @@ int sync_with_remote(git_repository *repo, const char *remote, const char *branc
report_error("Cannot sync with cloud server, working with offline copy");
else
report_error("Unable to fetch remote '%s'", remote);
if (verbose)
// If we returned GIT_EUSER during authentication, giterr_last() returns NULL
SSRF_INFO("remote fetch failed (%s)\n",
giterr_last() ? giterr_last()->message : "authentication failed");
// If we returned GIT_EUSER during authentication, giterr_last() returns NULL
SSRF_INFO("git storage: remote fetch failed (%s)\n", giterr_last() ? giterr_last()->message : "authentication failed");
// Since we failed to sync with online repository, enter offline mode
git_local_only = true;
error = 0;
@ -729,10 +749,12 @@ static git_repository *update_local_repo(const char *localdir, const char *remot
error = git_repository_open(&repo, localdir);
if (error) {
const char *msg = giterr_last()->message;
SSRF_INFO("git storage: unable to open local cache at %s: %s", localdir, msg);
if (is_subsurface_cloud)
(void)cleanup_local_cache(remote, branch);
else
report_error("Unable to open git cache repository at %s: %s", localdir, giterr_last()->message);
report_error("Unable to open git cache repository at %s: %s", localdir, msg);
return NULL;
}
@ -742,7 +764,7 @@ static git_repository *update_local_repo(const char *localdir, const char *remot
if (!git_branch_name(&name, head)) {
if (strcmp(name, branch)) {
char *branchref = format_string("refs/heads/%s", branch);
SSRF_INFO("Setting cache branch from '%s' to '%s'", name, branch);
SSRF_INFO("git storage: setting cache branch from '%s' to '%s'", name, branch);
git_repository_set_head(repo, branchref);
free(branchref);
}
@ -765,19 +787,19 @@ static int repository_create_cb(git_repository **out, const char *path, int bare
int ret = git_repository_init(out, path, bare);
if (ret != 0) {
if (verbose)
SSRF_INFO("Initializing git repository failed\n");
SSRF_INFO("git storage: initializing git repository failed\n");
return ret;
}
git_repository_config(&conf, *out);
if (getProxyString(&proxy_string)) {
if (verbose)
SSRF_INFO("set proxy to \"%s\"\n", proxy_string);
SSRF_INFO("git storage: set proxy to \"%s\"\n", proxy_string);
git_config_set_string(conf, "http.proxy", proxy_string);
free(proxy_string);
} else {
if (verbose)
SSRF_INFO("delete proxy setting\n");
SSRF_INFO("git storage: delete proxy setting\n");
git_config_delete_entry(conf, "http.proxy");
}
return ret;
@ -843,18 +865,21 @@ static git_repository *create_local_repo(const char *localdir, const char *remot
opts.fetch_opts.callbacks.certificate_check = certificate_check_cb;
opts.checkout_branch = branch;
if (is_subsurface_cloud && !canReachCloudServer())
if (is_subsurface_cloud && !canReachCloudServer()) {
SSRF_INFO("git storage: cannot reach remote server");
return 0;
}
if (verbose > 1)
SSRF_INFO("git storage: calling git_clone()\n");
error = git_clone(&cloned_repo, remote, localdir, &opts);
if (verbose > 1)
SSRF_INFO("git storage: returned from git_clone() with error %d\n", error);
SSRF_INFO("git storage: returned from git_clone() with return value %d\n", error);
if (error) {
SSRF_INFO("git storage: clone of %s failed", remote);
char *msg = "";
if (giterr_last()) {
msg = giterr_last()->message;
SSRF_INFO("error message was %s\n", msg);
SSRF_INFO("git storage: error message was %s\n", msg);
}
char *pattern = format_string("reference 'refs/remotes/origin/%s' not found", branch);
// it seems that we sometimes get 'Reference' and sometimes 'reference'
@ -863,7 +888,7 @@ static git_repository *create_local_repo(const char *localdir, const char *remot
* to our cloud storage and the branch doesn't exist.
* So we need to create the branch and push it to the remote */
if (verbose)
SSRF_INFO("remote repo didn't include our branch\n");
SSRF_INFO("git storage: remote repo didn't include our branch\n");
cloned_repo = create_and_push_remote(localdir, remote, branch);
#if !defined(DEBUG) && !defined(SUBSURFACE_MOBILE)
} else if (is_subsurface_cloud) {
@ -894,7 +919,7 @@ static struct git_repository *get_remote_repo(const char *localdir, const char *
enum remote_transport rt = url_to_remote_transport(remote);
if (verbose > 1) {
SSRF_INFO("git_remote_repo: accessing %s\n", remote);
SSRF_INFO("git storage: accessing %s\n", remote);
}
git_storage_update_progress(translate("gettextFromC", "Synchronising data file"));
/* Do we already have a local cache? */
@ -1077,7 +1102,7 @@ struct git_repository *is_git_repository(const char *filename, const char **bran
if (subsurface_stat(loc, &st) < 0 || !S_ISDIR(st.st_mode)) {
if (verbose)
SSRF_INFO("loc %s wasn't found or is not a directory\n", loc);
SSRF_INFO("git storage: loc %s wasn't found or is not a directory\n", loc);
free(loc);
free(branch);
return dummy_git_repository;