build: add enhanced information (#2067)

This commit adjusts the build flags to include version information in the LDFLAGS using the -X options. Additionally this makes the information recorded at build time more comprehensive. All build information can now be obtained via the `authelia build` command, and the `authelia version` command is now `authelia --version`. Lastly this adjusts the Dockerfile to utilize docker cache more effectively.

1 files changed, 67 insertions, 0 deletions

diff --git a/cmd/authelia-scripts/helpers.go b/cmd/authelia-scripts/helpers.go
new file mode 100644
index 000000000..2b71d1e65
--- /dev/null
+++ b/cmd/authelia-scripts/helpers.go
@@ -0,0 +1,67 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/authelia/authelia/internal/utils"
+)
+
+func getXFlags(branch, build, extra string) (flags []string, err error) {
+	if branch == "" {
+		out, _, err := utils.RunCommandAndReturnOutput("git rev-parse --abbrev-ref HEAD")
+		if err != nil {
+			return flags, err
+		}
+
+		if out == "" {
+			branch = "master"
+		} else {
+			branch = out
+		}
+	}
+
+	gitTagCommit, _, err := utils.RunCommandAndReturnOutput("git rev-list --tags --max-count=1")
+	if err != nil {
+		return flags, err
+	}
+
+	tag, _, err := utils.RunCommandAndReturnOutput("git describe --tags --abbrev=0 " + gitTagCommit)
+	if err != nil {
+		return flags, err
+	}
+
+	commit, _, err := utils.RunCommandAndReturnOutput("git rev-parse HEAD")
+	if err != nil {
+		return flags, err
+	}
+
+	var states []string
+
+	if gitTagCommit == commit {
+		states = append(states, "tagged")
+	} else {
+		states = append(states, "untagged")
+	}
+
+	if _, exitCode, _ := utils.RunCommandAndReturnOutput("git diff --quiet"); exitCode != 0 {
+		states = append(states, "dirty")
+	} else {
+		states = append(states, "clean")
+	}
+
+	if build == "" {
+		build = "manual"
+	}
+
+	return []string{
+		fmt.Sprintf(fmtLDFLAGSX, "BuildBranch", branch),
+		fmt.Sprintf(fmtLDFLAGSX, "BuildTag", tag),
+		fmt.Sprintf(fmtLDFLAGSX, "BuildCommit", commit),
+		fmt.Sprintf(fmtLDFLAGSX, "BuildDate", time.Now().Format("Mon, 02 Jan 2006 15:04:05 -0700")),
+		fmt.Sprintf(fmtLDFLAGSX, "BuildState", strings.Join(states, " ")),
+		fmt.Sprintf(fmtLDFLAGSX, "BuildExtra", extra),
+		fmt.Sprintf(fmtLDFLAGSX, "BuildNumber", build),
+	}, nil
+}