diff --git a/examples/lang/binarypath.mcl b/examples/lang/binarypath.mcl new file mode 100644 index 000000000..70288efc0 --- /dev/null +++ b/examples/lang/binarypath.mcl @@ -0,0 +1,5 @@ +import "deploy" + +print "debug" { + msg => deploy.binary_path(), +} diff --git a/lang/core/deploy/binary_func.go b/lang/core/deploy/binary_func.go new file mode 100644 index 000000000..52c24ab9a --- /dev/null +++ b/lang/core/deploy/binary_func.go @@ -0,0 +1,69 @@ +// Mgmt +// Copyright (C) 2013-2024+ James Shubin and the project contributors +// Written by James Shubin and the project contributors +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program. If not, see . +// +// Additional permission under GNU GPL version 3 section 7 +// +// If you modify this program, or any covered work, by linking or combining it +// with embedded mcl code and modules (and that the embedded mcl code and +// modules which link with this program, contain a copy of their source code in +// the authoritative form) containing parts covered by the terms of any other +// license, the licensors of this program grant you additional permission to +// convey the resulting work. Furthermore, the licensors of this program grant +// the original author, James Shubin, additional permission to update this +// additional permission if he deems it necessary to achieve the goals of this +// additional permission. + +package coredeploy + +import ( + "context" + "os" + "path/filepath" + + "github.com/purpleidea/mgmt/lang/funcs/simple" + "github.com/purpleidea/mgmt/lang/types" +) + +func init() { + simple.ModuleRegister(ModuleName, "binary_path", &simple.Scaffold{ + T: types.NewType("func() str"), + F: BinaryPath, + }) +} + +// BinaryPath returns the path to the binary of this program. This is useful for +// bootstrapping new machines when we want to get the path to copy it over from. +func BinaryPath(ctx context.Context, input []types.Value) (types.Value, error) { + p1, err := os.Executable() + if err != nil { + return nil, err + } + + p2, err := filepath.EvalSymlinks(p1) + if err != nil { + return nil, err + } + + p3, err := filepath.Abs(p2) + if err != nil { + return nil, err + } + + return &types.StrValue{ + V: p3, + }, nil +}