Merge branch 'lm/credential-netrc'

Update credential-netrc helper (in contrib/) to allow customizing
the GPG used to decrypt the encrypted .netrc file.

* lm/credential-netrc:
  git-credential-netrc: accept gpg option
  git-credential-netrc: adapt to test framework for git

contrib/credential/netrc/Makefile

 test:
-	./test.pl
+	./t-git-credential-netrc.sh
 testverbose:
-	./test.pl -d -v
+	./t-git-credential-netrc.sh -d -v

contrib/credential/netrc/git-credential-netrc

@@ -2,11 +2,13 @@
 use strict;
 use warnings;
+use autodie;
 use Getopt::Long;
 use File::Basename;
-my $VERSION = "0.1";
+use Git;
+my $VERSION = "0.2";
 my %options = (
 	       help => 0,
@@ -54,6 +56,7 @@ GetOptions(\%options,
            "insecure|k",
            "verbose|v",
            "file|f=s@",
+           'gpg|g:s',
           );
 if ($options{help}) {
@@ -62,27 +65,31 @@ if ($options{help}) {
 	print <<EOHIPPUS;
-$0 [-f AUTHFILE1] [-f AUTHFILEN] [-d] [-v] [-k] get
+$0 [(-f <authfile>)...] [-g <program>] [-d] [-v] [-k] get
 Version $VERSION by tzz\@lifelogs.com.  License: BSD.
 Options:
-  -f|--file AUTHFILE : specify netrc-style files.  Files with the .gpg extension
-                       will be decrypted by GPG before parsing.  Multiple -f
-                       arguments are OK.  They are processed in order, and the
-                       first matching entry found is returned via the credential
-                       helper protocol (see below).
-                       When no -f option is given, .authinfo.gpg, .netrc.gpg,
-		       .authinfo, and .netrc files in your home directory are used
-		       in this order.
-  -k|--insecure      : ignore bad file ownership or permissions
-  -d|--debug         : turn on debugging (developer info)
-  -v|--verbose       : be more verbose (show files and information found)
+  -f|--file <authfile>: specify netrc-style files.  Files with the .gpg
+                        extension will be decrypted by GPG before parsing.
+                        Multiple -f arguments are OK.  They are processed in
+                        order, and the first matching entry found is returned
+                        via the credential helper protocol (see below).
+                        When no -f option is given, .authinfo.gpg, .netrc.gpg,
+                        .authinfo, and .netrc files in your home directory are
+                        used in this order.
+  -g|--gpg <program>  : specify the program for GPG. By default, this is the
+                        value of gpg.program in the git repository or global
+                        option or gpg.
+  -k|--insecure       : ignore bad file ownership or permissions
+  -d|--debug          : turn on debugging (developer info)
+
+  -v|--verbose        : be more verbose (show files and information found)
 To enable this credential helper:
@@ -99,8 +106,9 @@ in the path.)
   git config credential.helper '$shortname -f AUTHFILE -v'
-Only "get" mode is supported by this credential helper.  It opens every AUTHFILE
-and looks for the first entry that matches the requested search criteria:
+Only "get" mode is supported by this credential helper.  It opens every
+<authfile> and looks for the first entry that matches the requested search
+criteria:
  'port|protocol':
    The protocol that will be used (e.g., https). (protocol=X)
@@ -120,7 +128,7 @@ host=github.com
 protocol=https
 username=tzz
-this credential helper will look for the first entry in every AUTHFILE that
+this credential helper will look for the first entry in every <authfile> that
 matches
 machine github.com port https login tzz
@@ -137,8 +145,8 @@ Then, the helper will print out whatever tokens it got from the entry, including
 back to "protocol".  Any redundant entry tokens (part of the original query) are
 skipped.
-Again, note that only the first matching entry from all the AUTHFILEs, processed
-in the sequence given on the command line, is used.
+Again, note that only the first matching entry from all the <authfile>s,
+processed in the sequence given on the command line, is used.
 Netrc/authinfo tokens can be quoted as 'STRING' or "STRING".
@@ -152,7 +160,7 @@ EOHIPPUS
 my $mode = shift @ARGV;
 # Credentials must get a parameter, so die if it's missing.
-die "Syntax: $0 [-f AUTHFILE1] [-f AUTHFILEN] [-d] get" unless defined $mode;
+die "Syntax: $0 [(-f <authfile>)...] [-d] get" unless defined $mode;
 # Only support 'get' mode; with any other unsupported ones we just exit.
 exit 0 unless $mode eq 'get';
@@ -172,6 +180,8 @@ unless (scalar @$files) {
 	$files = $options{file} = [ map { glob $_ } @candidates ];
 }
+load_config(\%options);
+
 my $query = read_credential_data_from_stdin();
 FILE:
@@ -233,7 +243,7 @@ sub load_netrc {
 	my $io;
 	if ($gpgmode) {
-		my @cmd = (qw(gpg --decrypt), $file);
+		my @cmd = ($options{'gpg'}, qw(--decrypt), $file);
 		log_verbose("Using GPG to open $file: [@cmd]");
 		open $io, "-|", @cmd;
 	} else {
@@ -410,6 +420,14 @@ sub print_credential_data {
 		printf "%s=%s\n", $git_token, $entry->{$git_token};
 	}
 }
+sub load_config {
+	# load settings from git config
+	my $options = shift;
+	# set from command argument, gpg.program option, or default to gpg
+	$options->{'gpg'} //= Git->repository()->config('gpg.program')
+	                  // 'gpg';
+	log_verbose("using $options{'gpg'} for GPG operations");
+}
 sub log_verbose {
 	return unless $options{verbose};
 	printf STDERR @_;

contrib/credential/netrc/t-git-credential-netrc.sh

+#!/bin/sh
+(
+	cd ../../../t
+	test_description='git-credential-netrc'
+	. ./test-lib.sh
+
+	if ! test_have_prereq PERL; then
+		skip_all='skipping perl interface tests, perl not available'
+		test_done
+	fi
+
+	perl -MTest::More -e 0 2>/dev/null || {
+		skip_all="Perl Test::More unavailable, skipping test"
+		test_done
+	}
+
+	# set up test repository
+
+	test_expect_success \
+    'set up test repository' \
+    'git config --add gpg.program test.git-config-gpg'
+
+	# The external test will outputs its own plan
+	test_external_has_tap=1
+
+	test_external \
+    'git-credential-netrc' \
+    perl "$TEST_DIRECTORY"/../contrib/credential/netrc/test.pl
+
+	test_done
+)

contrib/credential/netrc/test.command-option-gpg

+#!/bin/sh
+echo machine command-option-gpg login username password password

contrib/credential/netrc/test.git-config-gpg

+#!/bin/sh
+echo machine git-config-gpg login username password password

contrib/credential/netrc/test.pl

 #!/usr/bin/perl
+use lib (split(/:/, $ENV{GITPERLLIB}));
 use warnings;
 use strict;
-use Test;
+use Test::More qw(no_plan);
+use File::Basename;
+use File::Spec::Functions qw(:DEFAULT rel2abs);
 use IPC::Open2;
-BEGIN { plan tests => 15 }
+BEGIN {
+	# t-git-credential-netrc.sh kicks off our testing, so we have to go
+	# from there.
+	Test::More->builder->current_test(1);
+	Test::More->builder->no_ending(1);
+}
 my @global_credential_args = @ARGV;
-my $netrc = './test.netrc';
-print "# Testing insecure file, nothing should be found\n";
+my $scriptDir = dirname rel2abs $0;
+my ($netrc, $netrcGpg, $gcNetrc) = map { catfile $scriptDir, $_; }
+                                       qw(test.netrc
+                                          test.netrc.gpg
+                                          git-credential-netrc);
+local $ENV{PATH} = join ':'
+                      , $scriptDir
+                      , $ENV{PATH}
+                      ? $ENV{PATH}
+                      : ();
+
+diag "Testing insecure file, nothing should be found\n";
 chmod 0644, $netrc;
 my $cred = run_credential(['-f', $netrc, 'get'],
 			  { host => 'github.com' });
-ok(scalar keys %$cred, 0, "Got 0 keys from insecure file");
-print "# Testing missing file, nothing should be found\n";
+ok(scalar keys %$cred == 0, "Got 0 keys from insecure file");
+diag "Testing missing file, nothing should be found\n";
 chmod 0644, $netrc;
 $cred = run_credential(['-f', '///nosuchfile///', 'get'],
 		       { host => 'github.com' });
-ok(scalar keys %$cred, 0, "Got 0 keys from missing file");
+ok(scalar keys %$cred == 0, "Got 0 keys from missing file");
 chmod 0600, $netrc;
-print "# Testing with invalid data\n";
+diag "Testing with invalid data\n";
 $cred = run_credential(['-f', $netrc, 'get'],
 		       "bad data");
-ok(scalar keys %$cred, 4, "Got first found keys with bad data");
-print "# Testing netrc file for a missing corovamilkbar entry\n";
+ok(scalar keys %$cred == 4, "Got first found keys with bad data");
+diag "Testing netrc file for a missing corovamilkbar entry\n";
 $cred = run_credential(['-f', $netrc, 'get'],
 		       { host => 'corovamilkbar' });
-ok(scalar keys %$cred, 0, "Got no corovamilkbar keys");
-print "# Testing netrc file for a github.com entry\n";
+ok(scalar keys %$cred == 0, "Got no corovamilkbar keys");
+diag "Testing netrc file for a github.com entry\n";
 $cred = run_credential(['-f', $netrc, 'get'],
 		       { host => 'github.com' });
-ok(scalar keys %$cred, 2, "Got 2 Github keys");
-ok($cred->{password}, 'carolknows', "Got correct Github password");
-ok($cred->{username}, 'carol', "Got correct Github username");
-print "# Testing netrc file for a username-specific entry\n";
+ok(scalar keys %$cred == 2, "Got 2 Github keys");
+is($cred->{password}, 'carolknows', "Got correct Github password");
+is($cred->{username}, 'carol', "Got correct Github username");
+diag "Testing netrc file for a username-specific entry\n";
 $cred = run_credential(['-f', $netrc, 'get'],
 		       { host => 'imap', username => 'bob' });
-ok(scalar keys %$cred, 2, "Got 2 username-specific keys");
-ok($cred->{password}, 'bobwillknow', "Got correct user-specific password");
-ok($cred->{protocol}, 'imaps', "Got correct user-specific protocol");
-print "# Testing netrc file for a host:port-specific entry\n";
+ok(scalar keys %$cred == 2, "Got 2 username-specific keys");
+is($cred->{password}, 'bobwillknow', "Got correct user-specific password");
+is($cred->{protocol}, 'imaps', "Got correct user-specific protocol");
+diag "Testing netrc file for a host:port-specific entry\n";
 $cred = run_credential(['-f', $netrc, 'get'],
 		       { host => 'imap2:1099' });
-ok(scalar keys %$cred, 2, "Got 2 host:port-specific keys");
-ok($cred->{password}, 'tzzknow', "Got correct host:port-specific password");
-ok($cred->{username}, 'tzz', "Got correct host:port-specific username");
-print "# Testing netrc file that 'host:port kills host' entry\n";
+ok(scalar keys %$cred == 2, "Got 2 host:port-specific keys");
+is($cred->{password}, 'tzzknow', "Got correct host:port-specific password");
+is($cred->{username}, 'tzz', "Got correct host:port-specific username");
+diag "Testing netrc file that 'host:port kills host' entry\n";
 $cred = run_credential(['-f', $netrc, 'get'],
 		       { host => 'imap2' });
-ok(scalar keys %$cred, 2, "Got 2 'host:port kills host' keys");
-ok($cred->{password}, 'bobwillknow', "Got correct 'host:port kills host' password");
-ok($cred->{username}, 'bob', "Got correct 'host:port kills host' username");
+ok(scalar keys %$cred == 2, "Got 2 'host:port kills host' keys");
+
+is($cred->{password}, 'bobwillknow', "Got correct 'host:port kills host' password");
+is($cred->{username}, 'bob', "Got correct 'host:port kills host' username");
+
+diag 'Testing netrc file decryption by git config gpg.program setting\n';
+$cred = run_credential( ['-f', $netrcGpg, 'get']
+                      , { host => 'git-config-gpg' }
+                      );
+
+ok(scalar keys %$cred == 2, 'Got keys decrypted by git config option');
+
+diag 'Testing netrc file decryption by gpg option\n';
+$cred = run_credential( ['-f', $netrcGpg, '-g', 'test.command-option-gpg', 'get']
+                      , { host => 'command-option-gpg' }
+                      );
+ok(scalar keys %$cred == 2, 'Got keys decrypted by command option');
 sub run_credential
 {
 	my $args = shift @_;
 	my $data = shift @_;
 	my $pid = open2(my $chld_out, my $chld_in,
-			'./git-credential-netrc', @global_credential_args,
+			$gcNetrc, @global_credential_args,
 			@$args);
 	die "Couldn't open pipe to netrc credential helper: $!" unless $pid;