1 files changed, 101 insertions, 0 deletions
diff --git a/commits.go b/commits.go
new file mode 100644
index 0000000..c429bca
--- /dev/null
+++ b/commits.go
@@ -0,0 +1,101 @@
+package main
+
+import (
+	"fmt"
+	"github.com/KatolaZ/git2go"
+	"golang.org/x/crypto/openpgp"
+	"os"
+	"strings"
+	"log"
+)
+
+func CommitToString(commit *git.Commit) string {
+
+	var ret string
+
+	ret += fmt.Sprintf("type: %s\n", commit.Type())
+	ret += fmt.Sprintf("Id: %s\n", commit.Id())
+	ret += fmt.Sprintf("Author: %s\n", commit.Author())
+	ret += fmt.Sprintf("Message: %s\n", commit.Message())
+	ret += fmt.Sprintf("Parent-count: %d\n", commit.ParentCount())
+
+	return ret
+}
+
+// FIXME: RETURN THE ENTITY PROVIDED BY THE CHECK, OR nil
+func check_signature(commit *git.Commit, keyring *openpgp.KeyRing) (signature, signed string, err error) {
+
+	signature, signed, err = commit.ExtractSignature()
+	if err == nil {
+
+		_, err_sig :=
+			openpgp.CheckArmoredDetachedSignature(*keyring, strings.NewReader(signed),
+				strings.NewReader(signature))
+
+		if err_sig == nil {
+			fmt.Printf("Good signature \n")
+			return signature, signed, nil
+		}
+		err = err_sig
+	}
+
+	return "", "", err
+}
+
+
+// traverse all the commits between two references, looking for scorsh
+// commands
+// fixme: we don't have just one keyring here....
+func walk_commits(msg SCORSHmsg, keyring openpgp.KeyRing) int {
+
+	fmt.Printf("Inside parse_commits\n")
+
+	reponame := msg.repo
+	old_rev := msg.old_rev
+	new_rev := msg.new_rev
+
+	repo, err := git.OpenRepository(reponame)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error while opening repository %s (%s)\n",
+			reponame, err)
+		return SCORSH_ERR_NO_REPO
+	}
+
+	old_rev_oid, err := git.NewOid(old_rev)
+
+	oldrev_commit, err := repo.LookupCommit(old_rev_oid)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Commit: %s does not exist\n", old_rev)
+		return SCORSH_ERR_NO_COMMIT
+	}
+
+	new_rev_oid, err := git.NewOid(new_rev)
+
+	newrev_commit, err := repo.LookupCommit(new_rev_oid)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Commit: %s does not exist\n", new_rev)
+		return SCORSH_ERR_NO_COMMIT
+	}
+
+	cur_commit := newrev_commit
+
+	for cur_commit.Id().String() != oldrev_commit.Id().String() {
+
+		commit, err := repo.LookupCommit(cur_commit.Id())
+		if err == nil {
+
+			fmt.Printf("%s", CommitToString(commit))
+			//signature, signed, err := check_signature(commit, &keyring)
+			_, _, err := check_signature(commit, &keyring)
+			if err != nil {
+				log.Printf("%s\n", SCORSHErr(SCORSH_ERR_SIGNATURE))
+				
+			}
+			cur_commit = commit.Parent(0)
+		} else {
+			fmt.Printf("Commit %x not found!\n", cur_commit.Id())
+			return SCORSH_ERR_NO_COMMIT
+		}
+	}
+	return 0
+}