maint: Add a `check` target to run tests, and add nescessary dependencies

This also downgrades the sys/unix dep.

  The golang.org/x/sys/unix library can't be updated past commit
  ab9e364efd8b52800ff7ee48a9ffba4e0ed78dfb (where I have it right now)
  until go commit 93da0b6e66f24c4c307e0df37ceb102a33306174 (currently on
  master) makes it in to a release.  It narrowly missed the cut-off to
  be in go 1.9; I expect it to be in go 1.10 around February 2018.

10 files changed, 25 insertions, 8 deletions

diff --git a/.gitignore b/.gitignore
index 40f76d0..78a9c91 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 /LICENSE.*.txt
-!/LICENSE.bsd3.txt
+!/LICENSE.bsd*.txt
 /nshd.service
 /nshd.sysusers
 
diff --git a/.gitmodules b/.gitmodules
index 5b9a9ba..516ef6d 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -13,3 +13,9 @@
 [submodule    "go/src/golang.org/x/sys"]
 	path = go/src/golang.org/x/sys
 	url = https://go.googlesource.com/sys
+[submodule "go/src/gopkg.in/check.v1"]
+	path = go/src/gopkg.in/check.v1
+	url = https://gopkg.in/check.v1
+[submodule "go/src/github.com/pkg/errors"]
+	path = go/src/github.com/pkg/errors
+	url = https://github.com/pkg/errors
diff --git a/LICENSE.bsd2-gocheck.txt b/LICENSE.bsd2-gocheck.txt
new file mode 120000
index 0000000..2332993
--- /dev/null
+++ b/LICENSE.bsd2-gocheck.txt
@@ -0,0 +1 @@
+go/src/gopkg.in/check.v1/LICENSE
\ No newline at end of file
diff --git a/LICENSE.bsd2-pkg-errors.txt b/LICENSE.bsd2-pkg-errors.txt
new file mode 120000
index 0000000..805d1cd
--- /dev/null
+++ b/LICENSE.bsd2-pkg-errors.txt
@@ -0,0 +1 @@
+go/src/github.com/pkg/errors/LICENSE
\ No newline at end of file
diff --git a/LICENSE.bsd3.txt b/LICENSE.bsd3-sys-unix.txt
index f33946f..f33946f 120000
--- a/LICENSE.bsd3.txt
+++ b/LICENSE.bsd3-sys-unix.txt
diff --git a/LICENSE.txt b/LICENSE.txt
index c7d2dea..25fe9cf 100644
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -2,14 +2,17 @@ The software in this repository is under a number of licenses:
 
  bin/                                           GPL v2+
  go/src/nshd/                                   GPL v2+
- go/src/gopkg.in/yaml.v2                        Apache v2.0
- go/src/golang.org/x/sys/unix                   3-clause BSD license
- go/src/git.lukeshu.com/go/libgnulinux/crypt    LGPL v2.1+
- go/src/git.lukeshu.com/go/libgnulinux/dl       GPL v2+, with documentation output clarification
- go/src/git.lukeshu.com/go/libgnulinux/getgr    LGPL v2.1+
+ go/src/git.lukeshu.com/go/libgnulinux/crypt/   LGPL v2.1+
+ go/src/git.lukeshu.com/go/libgnulinux/dl/      GPL v2+, with documentation output clarification
+ go/src/git.lukeshu.com/go/libgnulinux/getgr/   LGPL v2.1+
  go/src/git.lukeshu.com/go/libnslcd/            LGPL v2.1+
  go/src/git.lukeshu.com/go/libsystemd/          Apache v2.0
 
+ go/src/github.com/pkg/errors/                  2-clause BSD license
+ go/src/golang.org/x/sys/unix                   3-clause BSD license
+ go/src/gopkg.in/check.v1/                      2-clause BSD license
+ go/src/gopkg.in/yaml.v2/                       Apache v2.0
+
  build-aux/                                     AGPL v3+
 
 The general notion is that the build system is AGPL (v3+), the core
@@ -20,8 +23,9 @@ exceptions:
    CoreOS and Docker.
  - The dl package is GPL v2+ licensed because of wording in comments
    taken from the Linux Programmer's Manual.
- - The YAML and sys/unix libraries use other licenses because they are
-   3rd-party libraries, and that's how the authors licensed them.
+ - pkg/errors, sys/unix, Gocheck, and YAML libraries use other
+   licenses because they are 3rd-party libraries, and that's how the
+   authors licensed them.
 
 The effective license of the 'nshd' program as a whole is GPL v3+; it
 links together code that is GPL v2+ with code that is Apache v2.0; the
diff --git a/Makefile b/Makefile
index bd8ee0b..4b5506e 100644
--- a/Makefile
+++ b/Makefile
@@ -90,6 +90,11 @@ $(outdir)/go/src/nshd/nshd_files/paths.go: $(var.)bindir $(var.)conf_file $(var.
 $(outdir)/go/bin/nshd: $(outdir)/$(files.generate) $(outdir)/go/src/nshd/nshd_files/paths.go
 files.out.all += $(outdir)/go/src/nshd/nshd_files/paths.go
 
+$(outdir)/check:
+	GOPATH=$$PWD/go go test $$(GOPATH=$$PWD/go go list -f '{{.ImportPath}}{{"\n"}}{{join .Deps "\n"}}' $(bins_go) | sort -u | grep -e ^nshd -e '\.[^/]*/')
+.PHONY: $(outdir)/check
+at.targets += $(outdir)/check
+
 
 # Install
 
diff --git a/go/src/github.com/pkg/errors b/go/src/github.com/pkg/errors
new file mode 160000
+Subproject c605e284fe17294bda444b34710735b29d1a9d9
diff --git a/go/src/golang.org/x/sys b/go/src/golang.org/x/sys
-Subproject 7ddbeae9ae08c6a06a59597f0c9edbc5ff2444c
+Subproject ab9e364efd8b52800ff7ee48a9ffba4e0ed78df
diff --git a/go/src/gopkg.in/check.v1 b/go/src/gopkg.in/check.v1
new file mode 160000
+Subproject 20d25e2804050c1cd24a7eea1e7a6447dd0e74e