MT#61800 perl: Use native try/catch keywords

This makes the code more ergonomic.

Change-Id: I2198f0841e616308e13337a2d547b4c04990f413

helper/sync-db

@@ -332,7 +332,7 @@ sub do_sync_general_timezone {
     my $ok = 1;
     my ($sql_log_bin) = $dbh->selectrow_array('SELECT @@sql_log_bin');
 
-    eval {
+    try {
         die "Error: general.timezone value is not set\n" unless $tz;
 
         $dbh->do("SET sql_log_bin=0");
@@ -353,9 +353,8 @@ SQL
         if ($DBI::err) {
             die "Error: Could not insert into ngcp.timezone: $DBI::errstr\n";
         }
-    };
-    if ($@) {
-        print $@;
+    } catch ($e) {
+        print $e;
         $ok = 0;
     }
     $dbh->do("SET sql_log_bin=$sql_log_bin");
@@ -378,7 +377,7 @@ sub do_sync_db_timezones {
     chomp $tzinfo_version;
 
     my $sql = '';
-    eval {
+    try {
         $dbh->begin_work() or die "Cannot start tx: $DBI::errstr\n";
         my ($cur_tzinfo_version) = $dbh->selectrow_array(<<SQL)
 SELECT version
@@ -429,10 +428,8 @@ INSERT INTO ngcp.tzinfo_version SET version = ?
     ON DUPLICATE KEY UPDATE version = ?, modified_at = CURRENT_TIMESTAMP
 SQL
             or die "Cannot insert into ngcp.tzinfo_version: $DBI::errstr\n";
-    };
-    my $err = $EVAL_ERROR;
-    if ($err) {
-        print $err;
+    } catch ($e) {
+        print $e;
         $dbh->rollback();
         return;
     }
@@ -453,7 +450,7 @@ sub do_sync_timezone_version {
     }
 
     my $sql = '';
-    eval {
+    try {
         $dbh->begin_work() or die "Cannot start tx: $DBI::errstr\n";
         my ($cur_tz_version) = $dbh->selectrow_array(<<SQL)
 SELECT COALESCE(version,'')
@@ -486,10 +483,8 @@ SQL
 UPDATE ngcp.timezone SET version = ?
 SQL
             or die "Cannot update ngcp.timezone: $DBI::errstr\n";
-    };
-    my $err = $EVAL_ERROR;
-    if ($err) {
-        print $err;
+    } catch ($e) {
+        print $e;
         $dbh->rollback();
         return;
     }

helper/tt2-process

@@ -211,14 +211,12 @@ sub process_input {
     # Assume safe defaults.
     umask 0077;
 
-    eval {
+    try {
         process_template($tt, $config, $input, $output);
-    };
-    if ($@) {
-        warn $@;
-        error("Generating $output based on $input: FAILED");
-    } else {
         info("Generating $output: OK");
+    } catch ($e) {
+        warn $e;
+        error("Generating $output based on $input: FAILED");
     }
 
     # Execute postbuild script.

sbin/ngcp-network-validator

@@ -261,12 +261,12 @@ if (defined $ENV{NGCP_KWALIFY_VERBOSE}) {
 
 my $errors = 0;
 
-eval {
+try {
     Kwalify::validate($schema, $yaml);
-} or do {
-    warn $@;
+} catch ($e) {
+    warn $e;
     $errors++;
-};
+}
 
 # Perform out-of-schema checks.
 $errors += miss_check(\%miss_peer, '[/hosts/<host>] Missing peer');

sbin/ngcp-sync-db-creds

@@ -284,10 +284,11 @@ sub flush_privs {
 }
 
 sub main {
-    eval {
+    try {
         $yml = YAML::XS::LoadFile($CONSTANTS_YML);
-    };
-    die "Can't read constants file: $EVAL_ERROR\n" if $EVAL_ERROR;
+    } catch ($e) {
+        die "Can't read constants file: $e\n";
+    }
 
     my ($dbhost, $dbport);
     if (my $db_cfg = Config::Tiny->read($DB_CFG)) {
@@ -315,8 +316,7 @@ sub main {
 
     $dbh->begin_work or die "Cannot start transaction: $DBI::errstr\n";
 
-    eval {
-
+    try {
         my $rc = sync_mysql_data();
 
         if ($rc) {
@@ -324,11 +324,10 @@ sub main {
         } else {
             log_debug("nothing to update");
         }
-    };
-    if ($@) {
+    } catch ($e) {
         $dbh->rollback if $dbh;
         $dbh->disconnect if $dbh;
-        die "Error: $@";
+        die "Error: $e";
     }
 
     $dbh->commit if $dbh;

sbin/ngcp-sync-db-grants

@@ -493,7 +493,7 @@ sub main {
 
     $dbh->begin_work or die "Cannot start transaction: $DBI::errstr\n";
 
-    eval {
+    try {
         my $rc = 0;
 
         create_protected_user($TEMP_GRANT_USER, $TEMP_GRANT_HOST);
@@ -520,11 +520,10 @@ sub main {
         if ($rc) {
             flush_privs();
         }
-    };
-    if ($@) {
+    } catch ($e) {
         $dbh->rollback if $dbh;
         $dbh->disconnect if $dbh;
-        die "Error: $@";
+        die "Error: $e";
     }
 
     $dbh->commit or die "Cannot commit transaction: $DBI::errstr\n";