Import the remaining utilities.

[utils/utils.git] / gitar

diff --git a/gitar b/gitar
new file mode 100755 (executable)
index 0000000..315bf2d
--- /dev/null
+++ b/gitar
@@ -0,0 +1,64 @@
+#!/bin/bash
+# usage: gitar foo-dir >foo.gitar
+
+set -e
+trap 'echo "Unexpected error!
+I am leaving the .git subdirectory around so you can troubleshoot;
+delete the subdirectory before trying to gitar again." 1>&2' ERR
+cd "$1"
+
+if [ -e '.git' ]; then
+       echo 'The source directory is already a git repository!' 1>&2
+       exit 1
+fi
+
+if ! find . -type d -empty | cmp /dev/null - >/dev/null; then
+       echo 'WARNING: The source directory contains empty directories, and git will drop them.' 1>&2
+fi
+
+# Make repository.
+git-init-db >/dev/null
+
+# Make a dummy commit to hold all the files.
+function list-files-to-add {
+       find . -wholename './.git' -prune -or '(' -type f -or -type l ')' -printf '%P\n'
+}
+list-files-to-add | git-update-index --add --stdin >/dev/null
+tree=$(git-write-tree)
+function clean-commit {
+       GIT_AUTHOR_NAME='reproducible' GIT_AUTHOR_EMAIL='' GIT_AUTHOR_DATE='946684801 +0000' GIT_COMMITTER_NAME='reproducible' GIT_COMMITTER_EMAIL='' GIT_COMMITTER_DATE='946684801 +0000' git-commit-tree "$@" </dev/null
+}
+clean-commit $tree >.git/refs/heads/master
+
+# Pack things up nicely.
+git-repack -a >/dev/null
+for i in pack idx; do
+       mv .git/objects/pack/{pack*.$i,pack.$i}
+done
+git-prune >/dev/null
+
+# Write out git repository as a Matt-style file tree.
+function write_file {
+       echo -n "+ ${#2} $2 "
+       stat --format=$'f %s' -- "$1/$2"
+       cat -- "$1/$2"
+       echo
+}
+echo '{'
+       echo '+ 4 HEAD f 23'
+       echo 'ref: refs/heads/master'
+       echo
+       echo '+ 4 refs {'
+               echo '+ 5 heads {'
+                       write_file .git/refs/heads master
+               echo '}'
+       echo '}'
+       echo '+ 7 objects {'
+               echo '+ 4 pack {'
+                       write_file .git/objects/pack pack.pack
+                       write_file .git/objects/pack pack.idx
+               echo '}'
+       echo '}'
+echo '}'
+
+rm -rf .git