Add `NewCredentialSSHKeyFromSigner` (#706)

This change adds `NewCredentialSSHKeyFromSigner`, which allows idiomatic
use of SSH keys from Go. This also lets us spin off an SSH server in the
tests.

12 files changed, 34 insertions, 0 deletions

diff --git a/testdata/TestGitRepository.git/HEAD b/testdata/TestGitRepository.git/HEAD
new file mode 100644
index 0000000..cb089cd
--- /dev/null
+++ b/testdata/TestGitRepository.git/HEAD
@@ -0,0 +1 @@
+ref: refs/heads/master
diff --git a/testdata/TestGitRepository.git/config b/testdata/TestGitRepository.git/config
new file mode 100644
index 0000000..44b9489
--- /dev/null
+++ b/testdata/TestGitRepository.git/config
@@ -0,0 +1,6 @@
+[core]
+	repositoryformatversion = 0
+	filemode = true
+	bare = true
+[remote "origin"]
+	url = https://github.com/libgit2/TestGitRepository
diff --git a/testdata/TestGitRepository.git/description b/testdata/TestGitRepository.git/description
new file mode 100644
index 0000000..498b267
--- /dev/null
+++ b/testdata/TestGitRepository.git/description
@@ -0,0 +1 @@
+Unnamed repository; edit this file 'description' to name the repository.
diff --git a/testdata/TestGitRepository.git/info/exclude b/testdata/TestGitRepository.git/info/exclude
new file mode 100644
index 0000000..a5196d1
--- /dev/null
+++ b/testdata/TestGitRepository.git/info/exclude
@@ -0,0 +1,6 @@
+# git ls-files --others --exclude-from=.git/info/exclude
+# Lines that start with '#' are comments.
+# For a project mostly in C, the following would be a good set of
+# exclude patterns (uncomment them if you want to use them):
+# *.[oa]
+# *~
diff --git a/testdata/TestGitRepository.git/info/refs b/testdata/TestGitRepository.git/info/refs
new file mode 100644
index 0000000..e10a563
--- /dev/null
+++ b/testdata/TestGitRepository.git/info/refs
@@ -0,0 +1,8 @@
+0966a434eb1a025db6b71485ab63a3bfbea520b6	refs/heads/first-merge
+49322bb17d3acc9146f98c97d078513228bbf3c0	refs/heads/master
+42e4e7c5e507e113ebbb7801b16b52cf867b7ce1	refs/heads/no-parent
+d96c4e80345534eccee5ac7b07fc7603b56124cb	refs/tags/annotated_tag
+c070ad8c08840c8116da865b2d65593a6bb9cd2a	refs/tags/annotated_tag^{}
+55a1a760df4b86a02094a904dfa511deb5655905	refs/tags/blob
+8f50ba15d49353813cc6e20298002c0d17b0a9ee	refs/tags/commit_tree
+6e0c7bdb9b4ed93212491ee778ca1c65047cab4e	refs/tags/nearly-dangling
diff --git a/testdata/TestGitRepository.git/objects/info/commit-graph b/testdata/TestGitRepository.git/objects/info/commit-graph
new file mode 100644
index 0000000..013e2f0
--- /dev/null
+++ b/testdata/TestGitRepository.git/objects/info/commit-graph
diff --git a/testdata/TestGitRepository.git/objects/info/packs b/testdata/TestGitRepository.git/objects/info/packs
new file mode 100644
index 0000000..d876b38
--- /dev/null
+++ b/testdata/TestGitRepository.git/objects/info/packs
@@ -0,0 +1,2 @@
+P pack-ccace4e169a0858c13d9ae781a91d76fc33769b8.pack
+
diff --git a/testdata/TestGitRepository.git/objects/pack/pack-ccace4e169a0858c13d9ae781a91d76fc33769b8.bitmap b/testdata/TestGitRepository.git/objects/pack/pack-ccace4e169a0858c13d9ae781a91d76fc33769b8.bitmap
new file mode 100644
index 0000000..df3442c
--- /dev/null
+++ b/testdata/TestGitRepository.git/objects/pack/pack-ccace4e169a0858c13d9ae781a91d76fc33769b8.bitmap
diff --git a/testdata/TestGitRepository.git/objects/pack/pack-ccace4e169a0858c13d9ae781a91d76fc33769b8.idx b/testdata/TestGitRepository.git/objects/pack/pack-ccace4e169a0858c13d9ae781a91d76fc33769b8.idx
new file mode 100644
index 0000000..aff5c2e
--- /dev/null
+++ b/testdata/TestGitRepository.git/objects/pack/pack-ccace4e169a0858c13d9ae781a91d76fc33769b8.idx
diff --git a/testdata/TestGitRepository.git/objects/pack/pack-ccace4e169a0858c13d9ae781a91d76fc33769b8.pack b/testdata/TestGitRepository.git/objects/pack/pack-ccace4e169a0858c13d9ae781a91d76fc33769b8.pack
new file mode 100644
index 0000000..a3a1206
--- /dev/null
+++ b/testdata/TestGitRepository.git/objects/pack/pack-ccace4e169a0858c13d9ae781a91d76fc33769b8.pack
diff --git a/testdata/TestGitRepository.git/packed-refs b/testdata/TestGitRepository.git/packed-refs
new file mode 100644
index 0000000..ead149c
--- /dev/null
+++ b/testdata/TestGitRepository.git/packed-refs
@@ -0,0 +1,9 @@
+# pack-refs with: peeled fully-peeled sorted 
+0966a434eb1a025db6b71485ab63a3bfbea520b6 refs/heads/first-merge
+49322bb17d3acc9146f98c97d078513228bbf3c0 refs/heads/master
+42e4e7c5e507e113ebbb7801b16b52cf867b7ce1 refs/heads/no-parent
+d96c4e80345534eccee5ac7b07fc7603b56124cb refs/tags/annotated_tag
+^c070ad8c08840c8116da865b2d65593a6bb9cd2a
+55a1a760df4b86a02094a904dfa511deb5655905 refs/tags/blob
+8f50ba15d49353813cc6e20298002c0d17b0a9ee refs/tags/commit_tree
+6e0c7bdb9b4ed93212491ee778ca1c65047cab4e refs/tags/nearly-dangling
diff --git a/testdata/TestGitRepository.git/refs/heads/master b/testdata/TestGitRepository.git/refs/heads/master
new file mode 100644
index 0000000..88fc4ea
--- /dev/null
+++ b/testdata/TestGitRepository.git/refs/heads/master
@@ -0,0 +1 @@
+49322bb17d3acc9146f98c97d078513228bbf3c0