Require Go 1.14 to build

.github/workflows/tests.yml

@@ -45,11 +45,6 @@ jobs:
             os: ubuntu-latest
             test_fuse: true
 
-          - job_name: Linux
-            go: 1.13.x
-            os: ubuntu-latest
-            test_fuse: true
-
     name: ${{ matrix.job_name }} Go ${{ matrix.go }}
     runs-on: ${{ matrix.os }}
 

CONTRIBUTING.md

@@ -66,7 +66,7 @@ Development Environment
 The repository contains the code written for restic in the directories
 `cmd/` and `internal/`.
 
-Restic requires Go version 1.13 or later for compiling. Clone the repo (without
+Restic requires Go version 1.14 or later for compiling. Clone the repo (without
 having `$GOPATH` set) and `cd` into the directory:
 
     $ unset GOPATH

build.go

@@ -35,6 +35,7 @@
 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+//go:build ignore_build_go
 // +build ignore_build_go
 
 package main
@@ -123,17 +124,8 @@ func printEnv(env []string) {
 
 // build runs "go build args..." with GOPATH set to gopath.
 func build(cwd string, env map[string]string, args ...string) error {
-	a := []string{"build"}
-
-	// try to remove all absolute paths from resulting binary
-	if goVersion.AtLeast(GoVersion{1, 13, 0}) {
-		// use the new flag introduced by Go 1.13
-		a = append(a, "-trimpath")
-	} else {
-		// otherwise try to trim as many paths as possible
-		a = append(a, "-asmflags", fmt.Sprintf("all=-trimpath=%s", cwd))
-		a = append(a, "-gcflags", fmt.Sprintf("all=-trimpath=%s", cwd))
-	}
+	// -trimpath removes all absolute paths from the binary.
+	a := []string{"build", "-trimpath"}
 
 	if enablePIE {
 		a = append(a, "-buildmode=pie")

changelog/unreleased/pull-3519

@@ -0,0 +1,6 @@
+Change: Require Go 1.14 or newer
+
+Restic now requires Go 1.14 to build. This allows it to use new
+standard library features instead of an external dependency.
+
+https://github.com/restic/restic/issues/3519

doc/020_installation.rst

@@ -255,7 +255,7 @@ From Source
 ***********
 
 restic is written in the Go programming language and you need at least
-Go version 1.13. Building restic may also work with older versions of Go,
+Go version 1.14. Building restic may also work with older versions of Go,
 but that's not supported. See the `Getting
 started <https://golang.org/doc/install>`__ guide of the Go project for
 instructions how to install Go.

go.mod

@@ -36,4 +36,4 @@ require (
 	gopkg.in/tomb.v2 v2.0.0-20161208151619-d5d1b5820637
 )
 
-go 1.13
+go 1.14