Try explore

.github/workflows/test.yaml

@@ -19,7 +19,7 @@ jobs:
         run: |
           uname -a
           sudo apt-get update
-          sudo apt-get install strace
+          sudo apt-get install strace expect
 
       - name: Checkout
         uses: actions/checkout@v2 

README.md

@@ -138,6 +138,9 @@ You can also choose to commit the overlay directory contents:
 $ try commit rustup-sandbox
 ```
 
+You can also run `try explore` to open your current shell in try, or `/try
+explore /tmp/tmp.X6OQb5tJwr` to explore an existing sandbox.
+
 ## Known Issues
 Any command that interacts with other users/groups will fail since only the
 current user's UID/GID are mapped. However, the [future

completions/try.bash

@@ -20,7 +20,7 @@ _try() {
 
     case "${cmd}" in
         try)
-            opts="-n -y -v -h -D summary commit"
+            opts="-n -y -v -h -D summary commit explore"
             if [[ ${cur} == -* || ${COMP_CWORD} -eq 1 ]] ; then
                 COMPREPLY=( $(compgen -W "${opts}" -- "${cur}") )
                 return 0

docs/try.1.md

@@ -9,6 +9,7 @@ try - run a command in an overlay
 | try [-n] [-D DIR] CMD [ARG ...]
 | try summary [DIR]
 | try commit [DIR]
+| try explore
 | try -v
 | try -h
 
@@ -53,6 +54,10 @@ try commit *DIR*
 
 : Commit the overlay in DIR
 
+try explore
+
+: Run in interactive mode
+
 ## Arguments
 
 *CMD*

test/run_tests.sh

@@ -155,6 +155,47 @@ EOF
     diff -q expected.out out.txt
 }
 
+test_explore()
+{
+    local try_workspace=$1
+    cd "$try_workspace/"
+
+    export SHELL="/bin/bash"
+
+    echo hi >expected.out
+
+    cat >explore.exp <<EOF
+#!/usr/bin/expect
+
+set timeout 3
+
+spawn "$try" explore
+expect {
+    ## Ignore the warnings
+    "Warning*" {
+        exp_continue
+    }
+    ## When we get the prompt, send the command
+    "#*" {
+        send -- "echo hi>test.txt\r"
+    }
+  }
+expect "#"
+## Send `exit`
+send \x04
+
+## Ignore all output and just send a y at the end
+expect ""
+expect "Commit*"
+send -- "y\r"
+expect eof
+EOF
+    ## Debug using the -d flag
+    expect explore.exp >/dev/null
+
+    diff -q expected.out test.txt
+}
+
 test_summary()
 {
     local try_workspace=$1
@@ -228,6 +269,7 @@ if [ "$#" -eq 0 ]; then
     run_test test_pipeline
     run_test test_cmd_sbst_and_var
     run_test test_summary
+    run_test test_explore
     run_test test_empty_summary
     run_test test_mkdir_on_file
 

try

@@ -323,7 +323,7 @@ fi
 case "$1" in
     (summary) : ${SANDBOX_DIR=$2}; summary;;
     (commit) : ${SANDBOX_DIR=$2}; commit;;
-    (explore) : ${SANDBOX_DIR=$2}; try bash;;
+    (explore) : ${SANDBOX_DIR=$2}; try "$SHELL";;
     (--) shift; try "$@";;
     (*) try "$@";;
 esac