git-pick

gistfile1.txt

#!/bin/sh
#
# 'tig-pick' is a wrapper script that uses 'tig' to pick a Git commit from the
# history. On success, the script prints the ID of the commit to standard
# output, so that it can be used as a parameter for subsequent commands, e.g.,
# 'git rebase -i $(tig-pick)'
#
# All parameters passed to the script will be forwarded to 'tig'.
#

set -e

CONFIG=$(mktemp)
trap "rm -f '$CONFIG'" EXIT

# Prepare config file: source user config, if present
if [ ! -z "$TIGRC_USER" ]; then
	echo "source $TIGRC_USER" >> "$CONFIG"
elif [ -f "$HOME/.tigrc" ]; then
	echo "source $HOME/.tigrc" >> "$CONFIG"
fi

# Bind Enter to print the selected commit ID to error output and exit after
# that.
echo 'bind main <Enter> <sh -c "echo %(commit) >&2"' >> "$CONFIG"

# Run tig with the standard and error output channels swapped.
export TIGRC_USER=$CONFIG
stderr=$(tig "$@" 3>&2 2>&1 1>&3 3>&-) || {
	status=$?
	echo "$stderr" >&2
	exit $status
}

# Extract the commit hash
commit_hash=$(echo "$stderr" | tail -n1)

# Check return value for valid commit hash
if ! printf '%s' "$commit_hash" | grep -iqE '^[0-9a-f]{40}$'; then
	echo "$stderr" >&2
	exit 1
fi

# Extract the commit message
commit_msg=$(git log --format=%B -n 1 "$commit_hash")

# Extract the repository group and name from the git remote URL
remote_url=$(git config --get remote.origin.url)

# If the remote URL is in SSH format (git@domain:group/repo.git), clean it up
if echo "$remote_url" | grep -q "git@"; then
  # Convert SSH URL to HTTPS format
  remote_url="https://$(echo "$remote_url" | sed -E 's#git@([^:]+):([^/]+)/([^/]+)\.git#\1/\2/\3#')"
else
  # For HTTPS URLs, just strip out unnecessary parts
  remote_url="https://$(echo "$remote_url" | sed -E 's#https?://([^/]+)/([^/]+)/([^/]+)\.git#\1/\2/\3#')"
fi

# Create the commit URL in the proper format
commit_url="$remote_url/commit/$commit_hash"

# Output the link in Markdown format and copy to clipboard if pbcopy is available
echo "[$commit_msg]($commit_url)"
echo "[$commit_msg]($commit_url)" | pbcopy