commit abb596709b6fd4f1d020370f5f546db0d932f324
Author: Oswald Buddenhagen <o...@users.sf.net>
Date: Thu May 5 18:33:59 2022 +0200
add --dry-run mode
REFMAIL: 20211130142121.xon5oygrpdfj5...@fastmail.com
NEWS | 2 ++
src/common.h | 2 ++
src/drv_proxy.c | 82 +++++++++++++++++++++++++++++++++++++++-----
src/drv_proxy_gen.pl | 34 ++++++++++++++++++
src/main.c | 6 ++++
src/main_sync.c | 8 +++--
src/mbsync.1 | 5 +++
src/sync_state.c | 13 +++++++
8 files changed, 142 insertions(+), 10 deletions(-)
diff --git a/NEWS b/NEWS
index 9faa4825..bbee6112 100644
--- a/NEWS
+++ b/NEWS
@@ -22,6 +22,8 @@ Added new sync operation 'Old'.
Added support for mirroring deletions more accurately.
+Added --dry-run option.
+
[1.4.0]
The 'isync' compatibility wrapper was removed.
diff --git a/src/common.h b/src/common.h
index c7ad08c5..92d1e89e 100644
--- a/src/common.h
+++ b/src/common.h
@@ -113,6 +113,8 @@ BIT_ENUM(
PROGRESS,
+ DRYRUN,
+
ZERODELAY,
KEEPJOURNAL,
FORCEJOURNAL,
diff --git a/src/drv_proxy.c b/src/drv_proxy.c
index 0cca3a52..37dbc34f 100644
--- a/src/drv_proxy.c
+++ b/src/drv_proxy.c
@@ -23,6 +23,8 @@ typedef union proxy_store {
gen_cmd_t *pending_cmds, **pending_cmds_append;
gen_cmd_t *check_cmds, **check_cmds_append;
wakeup_t wakeup;
+ uint fake_nextuid;
+ char is_fake; // Was "created" by dry-run
char force_async;
void (*expunge_callback)( message_t *msg, void *aux );
@@ -139,8 +141,11 @@ static @type@proxy_@name@( store_t *gctx )
{
proxy_store_t *ctx = (proxy_store_t *)gctx;
- @type@rv = ctx->real_driver->@name@( ctx->real_store );
- debug( "%sCalled @name@, ret=@fmt@\n", ctx->label, rv );
+ @type@rv;
+ @pre_invoke@
+ @indent_invoke@rv = ctx->real_driver->@name@( ctx->real_store );
+ @post_invoke@
+ debug( "%sCalled @name@@print_fmt_dry@, ret=@fmt@\n",
ctx->label@print_pass_dry@, rv );
return rv;
}
//# END
@@ -151,9 +156,12 @@ static @type@proxy_@name@( store_t *gctx@decl_args@ )
proxy_store_t *ctx = (proxy_store_t *)gctx;
@pre_print_args@
- debug( "%sEnter @name@@print_fmt_args@\n", ctx->label@print_pass_args@
);
+ debug( "%sEnter @name@@print_fmt_dry@@print_fmt_args@\n",
ctx->label@print_pass_dry@@print_pass_args@ );
@print_args@
- @type@rv = ctx->real_driver->@name@( ctx->real_store@pass_args@ );
+ @type@rv;
+ @pre_invoke@
+ @indent_invoke@rv = ctx->real_driver->@name@(
ctx->real_store@pass_args@ );
+ @post_invoke@
debug( "%sLeave @name@, ret=@print_fmt_ret@\n", ctx->label,
@print_pass_ret@ );
return rv;
}
@@ -165,9 +173,11 @@ static @type@proxy_@name@( store_t *gctx@decl_args@ )
proxy_store_t *ctx = (proxy_store_t *)gctx;
@pre_print_args@
- debug( "%sEnter @name@@print_fmt_args@\n", ctx->label@print_pass_args@
);
+ debug( "%sEnter @name@@print_fmt_dry@@print_fmt_args@\n",
ctx->label@print_pass_dry@@print_pass_args@ );
@print_args@
- ctx->real_driver->@name@( ctx->real_store@pass_args@ );
+ @pre_invoke@
+ @indent_invoke@ctx->real_driver->@name@( ctx->real_store@pass_args@ );
+ @post_invoke@
debug( "%sLeave @name@\n", ctx->label );
@action@
}
@@ -226,9 +236,11 @@ proxy_do_@name@( gen_cmd_t *gcmd )
proxy_store_t *ctx = cmd->ctx;
@pre_print_args@
- debug( "%s[% 2d] Enter @name@@print_fmt_args@\n", ctx->label,
cmd->tag@print_pass_args@ );
+ debug( "%s[% 2d] Enter @name@@print_fmt_dry@@print_fmt_args@\n",
ctx->label, cmd->tag@print_pass_dry@@print_pass_args@ );
@print_args@
- ctx->real_driver->@name@( ctx->real_store@pass_args@, proxy_@name@_cb,
cmd );
+ @pre_invoke@
+ @indent_invoke@ctx->real_driver->@name@( ctx->real_store@pass_args@,
proxy_@name@_cb, cmd );
+ @post_invoke@
debug( "%s[% 2d] Leave @name@\n", ctx->label, cmd->tag );
}
@@ -252,10 +264,51 @@ static @type@proxy_@name@( store_t *gctx@decl_args@, void
(*cb)( @decl_cb_args@v
debug( " %s\n", box->string );
//# END
+//# DEFINE select_box_pre_invoke
+ ctx->is_fake = 0;
+//# END
+
+//# DEFINE create_box_driable 1
+//# DEFINE create_box_fake_invoke
+ ctx->is_fake = 1;
+//# END
//# DEFINE create_box_counted 1
+//# DEFINE open_box_fakeable 1
+//# DEFINE open_box_fake_invoke
+ ctx->fake_nextuid = 1;
+//# END
+//# DEFINE open_box_fake_cb_args , 1
+
+//# DEFINE get_uidnext_fakeable 1
+//# DEFINE get_uidnext_fake_invoke
+ rv = ctx->fake_nextuid;
+//# END
+//# DEFINE get_uidnext_post_real_invoke
+ ctx->fake_nextuid = rv;
+//# END
+
+//# DEFINE get_supported_flags_fakeable 1
+//# DEFINE get_supported_flags_fake_invoke
+ rv = 255;
+//# END
+
+//# DEFINE confirm_box_empty_fakeable 1
+//# DEFINE confirm_box_empty_fake_invoke
+ rv = 1;
+//# END
+
+//# DEFINE delete_box_driable 1
+//# DEFINE delete_box_fake_invoke
+ ctx->is_fake = 0;
+//# END
//# DEFINE delete_box_counted 1
+//# DEFINE finish_delete_box_driable 1
+//# DEFINE finish_delete_box_fake_invoke
+ rv = DRV_OK;
+//# END
+
//# DEFINE prepare_load_box_print_fmt_args , opts=%s
//# DEFINE prepare_load_box_print_pass_args , fmt_opts( opts ).str
//# DEFINE prepare_load_box_print_fmt_ret %s
@@ -274,6 +327,8 @@ static @type@proxy_@name@( store_t *gctx@decl_args@, void
(*cb)( @decl_cb_args@v
debug( "\n" );
}
//# END
+//# DEFINE load_box_fakeable 1
+//# DEFINE load_box_fake_cb_args , NULL, 0, 0
//# DEFINE load_box_print_fmt_cb_args , total=%d, recent=%d
//# DEFINE load_box_print_pass_cb_args , total_msgs, recent_msgs
//# DEFINE load_box_print_cb_args
@@ -297,6 +352,11 @@ static @type@proxy_@name@( store_t *gctx@decl_args@, void
(*cb)( @decl_cb_args@v
//# DEFINE fetch_msg_print_fmt_args , uid=%u, want_flags=%s, want_date=%s
//# DEFINE fetch_msg_print_pass_args , cmd->msg->uid, !(cmd->msg->status &
M_FLAGS) ? "yes" : "no", cmd->data->date ? "yes" : "no"
+//# DEFINE fetch_msg_driable 1
+//# DEFINE fetch_msg_fake_invoke
+ cmd->data->data = strdup( "" );
+ cmd->data->len = 0;
+//# END
//# DEFINE fetch_msg_print_fmt_cb_args , flags=%s, date=%lld, size=%u
//# DEFINE fetch_msg_print_pass_cb_args , fmt_flags( cmd->data->flags ).str,
(long long)cmd->data->date, cmd->data->len
//# DEFINE fetch_msg_print_cb_args
@@ -318,17 +378,23 @@ static @type@proxy_@name@( store_t *gctx@decl_args@, void
(*cb)( @decl_cb_args@v
fflush( stdout );
}
//# END
+//# DEFINE store_msg_driable 1
+//# DEFINE store_msg_fake_cb_args , cmd->to_trash ? 0 : ctx->fake_nextuid++
//# DEFINE store_msg_counted 1
//# DEFINE set_msg_flags_checked 1
//# DEFINE set_msg_flags_print_fmt_args , uid=%u, add=%s, del=%s
//# DEFINE set_msg_flags_print_pass_args , cmd->uid, fmt_flags( cmd->add
).str, fmt_flags( cmd->del ).str
+//# DEFINE set_msg_flags_driable 1
//# DEFINE set_msg_flags_counted 1
//# DEFINE trash_msg_print_fmt_args , uid=%u
//# DEFINE trash_msg_print_pass_args , cmd->msg->uid
+//# DEFINE trash_msg_driable 1
//# DEFINE trash_msg_counted 1
+//# DEFINE close_box_driable 1
+//# DEFINE close_box_fake_cb_args , 0
//# DEFINE close_box_counted 1
//# DEFINE commit_cmds_print_args
diff --git a/src/drv_proxy_gen.pl b/src/drv_proxy_gen.pl
index 3fda58cb..6b9c8685 100755
--- a/src/drv_proxy_gen.pl
+++ b/src/drv_proxy_gen.pl
@@ -175,15 +175,49 @@ for (@ptypes) {
$replace{'print_pass_args'} = $replace{'pass_args'} =
$pass_args;
$replace{'print_fmt_args'} = make_format($cmd_args);
}
+ my ($fake_cond, $fake_invoke, $fake_cb_args, $post_invoke) = (undef,
"", "", "");
for (keys %defines) {
next if (!/^${cmd_name}_(.*)$/);
my ($key, $val) = ($1, delete $defines{$_});
if ($key eq 'counted') {
$replace{count_step} = "countStep();\n";
+ } elsif ($key eq 'fakeable') {
+ $fake_cond = "ctx->is_fake";
+ $replace{print_pass_dry} = ', '.$fake_cond.' ? "
[FAKE]" : ""';
+ } elsif ($key eq 'driable') {
+ $fake_cond = "DFlags & DRYRUN";
+ $replace{print_pass_dry} = ', ('.$fake_cond.') ? "
[DRY]" : ""';
+ } elsif ($key eq 'fake_invoke') {
+ $fake_invoke = $val;
+ } elsif ($key eq 'fake_cb_args') {
+ $fake_cb_args = $val;
+ } elsif ($key eq 'post_real_invoke') {
+ $post_invoke = $val;
} else {
$replace{$key} = $val;
}
}
+ if (defined($fake_cond)) {
+ $replace{print_fmt_dry} = '%s';
+ if ($inc_tpl eq 'CALLBACK_STS') {
+ $fake_invoke .= "proxy_${cmd_name}_cb(
DRV_OK${fake_cb_args}, cmd );\n";
+ } elsif (length($fake_cb_args)) {
+ die("Unexpected fake callback arguments to
$cmd_name\n");
+ }
+ my $num_fake = $fake_invoke =~ s/^(?=.)/\t/gsm;
+ my $num_real = $post_invoke =~ s/^(?=.)/\t/gsm;
+ my $pre_invoke = "if (".$fake_cond.")";
+ if ($num_fake > 1 || $num_real) {
+ $pre_invoke .= " {";
+ $fake_invoke .= "} else {\n";
+ $post_invoke .= "}\n";
+ } else {
+ $fake_invoke .= "else\n";
+ }
+ $replace{pre_invoke} = $pre_invoke."\n".$fake_invoke;
+ $replace{indent_invoke} = "\t";
+ $replace{post_invoke} = $post_invoke;
+ }
my %used;
my $text = $templates{$template};
if ($inc_tpl) {
diff --git a/src/main.c b/src/main.c
index 37304fab..ba467ac9 100644
--- a/src/main.c
+++ b/src/main.c
@@ -46,6 +46,7 @@ PACKAGE " " VERSION " - mailbox synchronizer\n"
" -x, --expunge-solo expunge deleted messages that are not paired\n"
" -c, --config CONFIG read an alternate config file (default: ~/." EXE "rc)\n"
" -D, --debug debugging modes (see manual)\n"
+" -y, --dry-run do not actually modify anything\n"
" -V, --verbose display what is happening\n"
" -q, --quiet don't display progress counters\n"
" -v, --version display version\n"
@@ -217,6 +218,8 @@ main( int argc, char **argv )
else
goto badopt;
DFlags |= op;
+ } else if (!strcmp( opt, "dry-run" )) {
+ DFlags |= DRYRUN;
} else if (!strcmp( opt, "pull" )) {
cops |= XOP_PULL, mvars->ops[F] |=
XOP_HAVE_TYPE;
} else if (!strcmp( opt, "push" )) {
@@ -454,6 +457,9 @@ main( int argc, char **argv )
op = DEBUG_ALL;
DFlags |= op;
break;
+ case 'y':
+ DFlags |= DRYRUN;
+ break;
case 'T':
for (; *ochar; ) {
switch (*ochar++) {
diff --git a/src/main_sync.c b/src/main_sync.c
index 0c7f6dbf..3d3d90f6 100644
--- a/src/main_sync.c
+++ b/src/main_sync.c
@@ -50,10 +50,14 @@ summary( void )
printf( "Processed %d box(es) in %d channel(s)", boxes_done, chans_done
);
for (int t = 2; --t >= 0; ) {
if (ops_any[t])
- printf( ",\n%sed %d new message(s) and %d flag
update(s)",
+ printf( (DFlags & DRYRUN) ?
+ ",\nwould %s %d new message(s) and %d flag
update(s)" :
+ ",\n%sed %d new message(s) and %d flag
update(s)",
str_hl[t], new_done[t], flags_done[t] );
if (trash_any[t])
- printf( ",\nmoved %d %s message(s) to trash",
+ printf( (DFlags & DRYRUN) ?
+ ",\nwould move %d %s message(s) to trash" :
+ ",\nmoved %d %s message(s) to trash",
trash_done[t], str_fn[t] );
}
puts( "." );
diff --git a/src/mbsync.1 b/src/mbsync.1
index dd0ad981..79a6afba 100644
--- a/src/mbsync.1
+++ b/src/mbsync.1
@@ -74,6 +74,11 @@ Display a summary of command line options.
\fB-v\fR, \fB--version\fR
Display version information.
.TP
+\fB-y\fR, \fB--dry-run\fR
+Enter simulation mode: the Channel status is queried and all required
+operations are determined, but no modifications are actually made
+to either the mailboxes or the state files.
+.TP
\fB-V\fR, \fB--verbose\fR
Enable \fIverbose\fR mode, which displays what is currently happening.
.TP
diff --git a/src/sync_state.c b/src/sync_state.c
index 3329efd0..385d089f 100644
--- a/src/sync_state.c
+++ b/src/sync_state.c
@@ -77,6 +77,9 @@ lock_state( sync_vars_t *svars )
{
struct flock lck;
+ if (DFlags & DRYRUN)
+ return 1;
+
if (svars->lfd >= 0)
return 1;
memset( &lck, 0, sizeof(lck) );
@@ -451,6 +454,8 @@ jFprintf( sync_vars_t *svars, const char *msg, ... )
va_list va;
if (!svars->jfp) {
+ if (DFlags & DRYRUN)
+ goto dryout;
create_state( svars );
if (!(svars->jfp = fopen( svars->jname, svars->replayed ? "a" :
"w" ))) {
sys_error( "Error: cannot create journal %s",
svars->jname );
@@ -463,6 +468,7 @@ jFprintf( sync_vars_t *svars, const char *msg, ... )
va_start( va, msg );
vFprintf( svars->jfp, msg, va );
va_end( va );
+ dryout:
countStep();
JCount++;
}
@@ -474,6 +480,10 @@ save_state( sync_vars_t *svars )
if (!svars->jfp && !svars->replayed)
return;
+ // jfp is NULL in this case anyway, but we might have replayed.
+ if (DFlags & DRYRUN)
+ return;
+
if (!svars->nfp)
create_state( svars );
Fprintf( svars->nfp,
@@ -506,6 +516,9 @@ save_state( sync_vars_t *svars )
void
delete_state( sync_vars_t *svars )
{
+ if (DFlags & DRYRUN)
+ return;
+
unlink( svars->nname );
unlink( svars->jname );
if (unlink( svars->dname ) || unlink( svars->lname )) {
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