diff options
Diffstat (limited to 'bin')
| -rwxr-xr-x | bin/sbang | 84 | ||||
| -rwxr-xr-x | bin/spack | 8 |
2 files changed, 88 insertions, 4 deletions
diff --git a/bin/sbang b/bin/sbang new file mode 100755 index 0000000000..ebfbe2e7a1 --- /dev/null +++ b/bin/sbang @@ -0,0 +1,84 @@ +#!/bin/bash +# +# `sbang`: Run scripts with long shebang lines. +# +# Many operating systems limit the length of shebang lines, making it +# hard to use interpreters that are deep in the directory hierarchy. +# `sbang` can run such scripts, either as a shebang interpreter, or +# directly on the command line. +# +# Usage +# ----------------------------- +# Suppose you have a script, long-shebang.sh, like this: +# +# 1 #!/very/long/path/to/some/interpreter +# 2 +# 3 echo "success!" +# +# Invoking this script will result in an error on some OS's. On +# Linux, you get this: +# +# $ ./long-shebang.sh +# -bash: ./long: /very/long/path/to/some/interp: bad interpreter: +# No such file or directory +# +# On Mac OS X, the system simply assumes the interpreter is the shell +# and tries to run with it, which is likely not what you want. +# +# +# `sbang` on the command line +# ----------------------------- +# You can use `sbang` in two ways. The first is to use it directly, +# from the command line, like this: +# +# $ sbang ./long-shebang.sh +# success! +# +# +# `sbang` as the interpreter +# ----------------------------- +# You can also use `sbang` *as* the interpreter for your script. Put +# `#!/bin/bash /path/to/sbang` on line 1, and move the original +# shebang to line 2 of the script: +# +# 1 #!/bin/bash /path/to/sbang +# 2 #!/long/path/to/real/interpreter with arguments +# 3 +# 4 echo "success!" +# +# $ ./long-shebang.sh +# success! +# +# On Linux, you could shorten line 1 to `#!/path/to/sbang`, but other +# operating systems like Mac OS X require the interpreter to be a +# binary, so it's best to use `sbang` as a `bash` argument. +# Obviously, for this to work, `sbang` needs to have a short enough +# path that *it* will run without hitting OS limits. +# +# +# How it works +# ----------------------------- +# `sbang` is a very simple bash script. It looks at the first two +# lines of a script argument and runs the last line starting with +# `#!`, with the script as an argument. It also forwards arguments. +# + +# First argument is the script we want to actually run. +script="$1" + +# Search the first two lines of script for interpreters. +lines=0 +while read line && ((lines < 2)) ; do + if [[ "$line" = '#!'* ]]; then + interpreter="${line#\#!}" + fi + lines=$((lines+1)) +done < "$script" + +# Invoke any interpreter found, or raise an error if none was found. +if [ -n "$interpreter" ]; then + exec $interpreter "$@" +else + echo "error: sbang found no interpreter in $script" + exit 1 +fi @@ -42,9 +42,9 @@ SPACK_EXTERNAL_LIBS = os.path.join(SPACK_LIB_PATH, "external") sys.path.insert(0, SPACK_EXTERNAL_LIBS) import warnings -# Avoid warnings when nose is installed with the python exe being used to run -# spack. Note this must be done after Spack's external libs directory is added -# to sys.path. +# Avoid warnings when nose is installed with the python exe being used to run +# spack. Note this must be done after Spack's external libs directory is added +# to sys.path. with warnings.catch_warnings(): warnings.filterwarnings("ignore", ".*nose was already imported") import nose @@ -62,7 +62,7 @@ for pyc_file in orphaned_pyc_files: try: os.remove(pyc_file) except OSError as e: - print "WARNING: Spack may fail mysteriously. Couldn't remove orphaned .pyc file: %s" % pyc + print "WARNING: Spack may fail mysteriously. Couldn't remove orphaned .pyc file: %s" % pyc_file # If there is no working directory, use the spack prefix. try: |