Dynmically generate ~/.gitconfig

Ancient versions of 'git' would use the unix passwd identity as the
default author/committer.  This dynamically-generated ~/.gitconfig
does the same.

Might as well set excludesfile = ~/.config/git/ignore

1 files changed, 29 insertions, 0 deletions

diff --git a/src/gitconfig.sh b/src/gitconfig.sh
new file mode 100755
index 0000000..3a7e824
--- /dev/null
+++ b/src/gitconfig.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+target=~/.gitconfig
+if [ -z "$OVERWRITE_GITCONFIG" ] && [ -e "$target" ]
+then
+  exit
+fi
+
+user=$(id -un)                                   || exit
+[ "$user" ]                                      || exit
+email=${user}@$(hostname --fqdn)                 || exit
+[ "$email" ]                                     || exit
+name=$(getent passwd "$user" | cut -d: -f2)      || : ok
+temp=$(mktemp ~/.gitconfig.tmp.XXX)              || exit
+[ "$temp" ]                                      || exit
+
+gitconfig()
+{
+cat <<END
+[user]
+        email = ${email}
+        name = ${name:-$email}
+[core]
+        excludesfile = ~/.config/git/ignore
+END
+}
+
+gitconfig > "$temp" &&
+  mv "$temp" "$target" ||
+    rm -f "$temp"