1	/*
     2	Copyright 2014 The Perkeep Authors
     3	
     4	Licensed under the Apache License, Version 2.0 (the "License");
     5	you may not use this file except in compliance with the License.
     6	You may obtain a copy of the License at
     7	
     8	     http://www.apache.org/licenses/LICENSE-2.0
     9	
    10	Unless required by applicable law or agreed to in writing, software
    11	distributed under the License is distributed on an "AS IS" BASIS,
    12	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13	See the License for the specific language governing permissions and
    14	limitations under the License.
    15	*/
    16	
    17	// Package buildinfo provides information about the current build.
    18	package buildinfo // import "perkeep.org/pkg/buildinfo"
    19	
    20	import "flag"
    21	
    22	// GitInfo is either the empty string (the default)
    23	// or is set to the git hash of the most recent commit
    24	// using the -X linker flag. For example, it's set like:
    25	// $ go install --ldflags="-X perkeep.org/pkg/buildinfo.GitInfo "`./misc/gitversion` perkeep.org/server/perkeepd
    26	var GitInfo string
    27	
    28	// Version is a string like "0.10" or "1.0", if applicable.
    29	var Version string
    30	
    31	// Summary returns the version and/or git version of this binary.
    32	// If the linker flags were not provided, the return value is "unknown".
    33	func Summary() string {
    34		if Version != "" && GitInfo != "" {
    35			return Version + ", " + GitInfo
    36		}
    37		if GitInfo != "" {
    38			return GitInfo
    39		}
    40		if Version != "" {
    41			return Version
    42		}
    43		return "unknown"
    44	}
    45	
    46	// TestingLinked reports whether the "testing" package is linked into the binary.
    47	func TestingLinked() bool {
    48		return flag.CommandLine.Lookup("test.v") != nil
    49	}
    50	
    51	// djpegFunc implements DjpegStatus. nil means the images/fastjpeg package
    52	// isn't linked in.
    53	var djpegFunc func() string
    54	
    55	func RegisterDjpegStatusFunc(fn func() string) {
    56		djpegFunc = fn
    57	}
    58	
    59	// DjpegStatus returns a plaintext (non-HTML) string describing the
    60	// state of djpeg on the system.
    61	func DjpegStatus() string {
    62		if djpegFunc != nil {
    63			return djpegFunc()
    64		}
    65		return "unknown"
    66	}