docs: Update binary reproduction instructions and refer to older instructions

doc/developer_information.rst

@@ -5,8 +5,9 @@ Reproducible Builds
 *******************
 
 This section describes how to reproduce the official released binaries for
-restic for version 0.9.3 and later. The binary produced depends on the
+restic for version 0.10.0 and later. For restic versions down to 0.9.3 please
-following things:
+refer to the documentation for the respective version. The binary produced
+depends on the following things:
 
  * The source code for the release
  * The exact version of the official `Go compiler <https://golang.org>`__ used to produce the binaries (running ``restic version`` will print this)
@@ -21,15 +22,17 @@ timestamp of the binary contained in it. In order to reproduce the exact same
 ZIP file every time, we update the timestamp of the file ``VERSION`` in the
 source code archive and set the timezone to Europe/Berlin.
 
-In the following example, we'll use the file ``restic-0.9.3.tar.gz`` and Go
+In the following example, we'll use the file ``restic-0.10.0.tar.gz`` and Go
-1.11.1 to reproduce the released binaries.
+1.15.2 to reproduce the released binaries.
 
-1. Download and extract the Go compiler into ``/usr/local/go``:
+1. Determine the Go compiler version used to build the released binaries, then download and extract the Go compiler into ``/usr/local/go``:
 
 .. code::
 
+    $ restic version
+    restic 0.10.0 compiled with go1.15.2 on linux/amd64
     $ cd /usr/local
-    $ curl -L https://dl.google.com/go/go1.11.1.linux-amd64.tar.gz | tar xz
+    $ curl -L https://dl.google.com/go/go1.15.2.linux-amd64.tar.gz | tar xz
 
 2. Extract the restic source code into ``/restic``
 
@@ -37,7 +40,7 @@ In the following example, we'll use the file ``restic-0.9.3.tar.gz`` and Go
 
     $ mkdir /restic
     $ cd /restic
-    $ TZ=Europe/Berlin curl -L https://github.com/restic/restic/releases/download/v0.9.3/restic-0.9.3.tar.gz | tar xz --strip-components=1
+    $ TZ=Europe/Berlin curl -L https://github.com/restic/restic/releases/download/v0.10.0/restic-0.10.0.tar.gz | tar xz --strip-components=1
 
 3. Build the binaries for Windows and Linux:
 
@@ -45,7 +48,7 @@ In the following example, we'll use the file ``restic-0.9.3.tar.gz`` and Go
 
     $ export PATH=/usr/local/go/bin:$PATH
     $ go version
-    go version go1.11.1 linux/amd64
+    go version go1.15.2 linux/amd64
 
     $ GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags "-s -w" -tags selfupdate -o restic_linux_amd64 ./cmd/restic
     $ bzip2 restic_linux_amd64
@@ -80,7 +83,7 @@ The following steps are necessary to build the binaries:
 
 .. code::
 
-    tar xvzf restic-0.9.3.tar.gz
+    tar xvzf restic-0.10.0.tar.gz
 
 3. Create a directory to place the resulting binaries in:
 
@@ -93,7 +96,7 @@ The following steps are necessary to build the binaries:
 .. code::
 
     docker run --rm \
-        --volume "$PWD/restic-0.9.3:/restic" \
+        --volume "$PWD/restic-0.10.0:/restic" \
         --volume "$PWD/output:/output" \
         restic/builder
 
@@ -102,7 +105,7 @@ The following steps are necessary to build the binaries:
 .. code::
 
     docker run --rm \
-        --volume "$PWD/restic-0.9.3:/restic" \
+        --volume "$PWD/restic-0.10.0:/restic" \
         --volume "$PWD/output:/output" \
         restic/builder \
         go run helpers/build-release-binaries/main.go --verbose
@@ -118,6 +121,6 @@ required argument is the new version number (in `Semantic Versioning
 
 .. code::
 
-    go run helpers/prepare-release/main.go 0.9.3
+    go run helpers/prepare-release/main.go 0.10.0
 
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