git: switch out the field names usage

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>

git/commits.go

@@ -2,9 +2,6 @@ package git
 
 import (
 	"bytes"
-	"encoding/json"
-	"fmt"
-	"log"
 	"os"
 	"os/exec"
 	"strings"
@@ -16,7 +13,7 @@ import (
 // If commitrange is a git still range 12345...54321, then it will be isolated set of commits.
 // If commitrange is a single commit, all ancestor commits up through the hash provided.
 func Commits(commitrange string) ([]CommitEntry, error) {
-	cmdArgs := []string{"git", "log", prettyFormat + formatCommit, commitrange}
+	cmdArgs := []string{"git", "log", `--pretty=format:%H`, commitrange}
 	if debug() {
 		logrus.Infof("[git] cmd: %q", strings.Join(cmdArgs, " "))
 	}
@@ -65,58 +62,18 @@ var FieldNames = map[string]string{
 // See also FieldNames
 type CommitEntry map[string]string
 
-var (
-	prettyFormat         = `--pretty=format:`
-	formatAuthorEmail    = `%aE`
-	formatAuthorName     = `%aN`
-	formatBody           = `%b`
-	formatCommit         = `%H`
-	formatCommitNotes    = `%N`
-	formatCommitterEmail = `%cE`
-	formatCommitterName  = `%cN`
-	formatSigner         = `%GS`
-	formatSubject        = `%s`
-	formatMap            = `{"commit": "%H", "abbreviated_commit": "%h", "tree": "%T", "abbreviated_tree": "%t", "parent": "%P", "abbreviated_parent": "%p", "refs": "%D", "encoding": "%e", "sanitized_subject_line": "%f", "verification_flag": "%G?", "signer_key": "%GK", "author_date": "%aD" , "committer_date": "%cD" }`
-)
-
 // LogCommit assembles the full information on a commit from its commit hash
 func LogCommit(commit string) (*CommitEntry, error) {
 	buf := bytes.NewBuffer([]byte{})
-	cmdArgs := []string{"git", "log", "-1", prettyFormat + formatMap, commit}
-	if debug() {
-		logrus.Infof("[git] cmd: %q", strings.Join(cmdArgs, " "))
-	}
-	cmd := exec.Command(cmdArgs[0], cmdArgs[1:]...)
+	c := CommitEntry{}
+	for k, v := range FieldNames {
+		cmd := exec.Command("git", "log", "-1", `--pretty=format:`+k+``, commit)
 		cmd.Stdout = buf
 		cmd.Stderr = os.Stderr
-
 		if err := cmd.Run(); err != nil {
-		log.Println(strings.Join(cmd.Args, " "))
 			return nil, err
 		}
-	c := CommitEntry{}
-	output := buf.Bytes()
-	if err := json.Unmarshal(output, &c); err != nil {
-		fmt.Println(string(output))
-		return nil, err
-	}
-
-	// any user provided fields can't be sanitized for the mock-json marshal above
-	for k, v := range map[string]string{
-		"subject":         formatSubject,
-		"body":            formatBody,
-		"author_name":     formatAuthorName,
-		"author_email":    formatAuthorEmail,
-		"committer_name":  formatCommitterName,
-		"committer_email": formatCommitterEmail,
-		"commit_notes":    formatCommitNotes,
-		"signer":          formatSigner,
-	} {
-		output, err := exec.Command("git", "log", "-1", prettyFormat+v, commit).Output()
-		if err != nil {
-			return nil, err
-		}
-		c[k] = strings.TrimSpace(string(output))
+		c[v] = strings.TrimSpace(string(buf.Bytes()))
 	}
 
 	return &c, nil