技術雜談：PastebinCL - Paste Your Code from Terminal

Pastebin.com is a website where you can store and share text or code for a certain period of time. Pastebin support syntax highlight for a variety of programming language. However, it is sometimes tedious to open the website and copy-paste your code. PastebinCL is a small command line utility help you to paste text to Pastebin directly from terminal.

Before compiling PastebinCL, you have to sign up a Pastebin account to get a unique developer api key. Then, download the tarball of PastebinCL from Pastebin website. Extract the tarball and compile with make. You need to enter your developer api key here. Then, you may or may not meet errors during the process. If you meet some problems, you need to modify src/Makefile to make PastebinCL. See later content for some tips.

$ tar -xzf pastebincl-1.0.tar.gz
$ cd pastebincl-1.0
$ make
cd src/ && make
-e

Enter your Pastebin Developper API Key (see http://pastebin.com/api), or leave blank to use the default one (may not work):
# enter your Pastebin developer api key here
{{< / highlight >}}

Then, move `pastebincl` to any execution directory like */usr/local/bin* for later use.

To paste text with your Pastebin account, type `pastebincl --usergen` and input your account name and password:

```console
$ pastebincl --usergen
{{< / highlight >}}

There are two ways to use PastebinCL.  You can type `pastebincl` with or without parameters and begin to type your text for paste.  Next, press `Ctrl-d` to paste your text.

```console
$pastebincl -n hello -s python
print "Hello World!"
# press Ctrl-d...
Submitting paste...
Paste submitted successfully!
URL: http://pastebin.com/VG858r4H
{{< / highlight >}}

Another way to paste text is to combine `cat` and `pastebincl`:

```console
$ cat example.rb | pastebincl -n "a example file" -s ruby
{{< / highlight >}}

To see more usage, type `pastebincl --help` in the terminal.

### Troubleshooting on OS X

You may meet the following error:

```console
clang: error: -lcurl: 'linker' input unused
make[1]: *** [CurlPost.o] Error 1
make: *** [pastebincl] Error 2
{{< / highlight >}}

To solve the problem, modify *src/Makefile* and delete **$(CXXLIBS)** in the following section:

```make
# before modification...
ConfigRead.o: ConfigRead.cpp
    $(CXX) $(CXXLIBS) -c $< $(CXXFLAGS) -o $@ -DENCODING_KEY=\"${ENC_KEY}\"

%.o: %.cpp
    $(CXX) $(CXXLIBS) -c $< $(CXXFLAGS) -o $@

# after modification...
ConfigRead.o: ConfigRead.cpp
    $(CXX) -c $< $(CXXFLAGS) -o $@ -DENCODING_KEY=\"${ENC_KEY}\"

%.o: %.cpp
    $(CXX) -c $< $(CXXFLAGS) -o $@
{{< / highlight >}}

Then, you may meet the following error:

```console
ConfigRead.cpp:50:12: error: comparison of constant with
      expression of type 'unsigned int' is always true
      [-Werror,-Wtautological-constant-out-of-range-compare]
      if(findpos!=string::npos)
         ~~~~~~~^ ~~~~~~~~~~~~
{{< / highlight >}}

In this case, modify *src/Makefile* and delete **-Werror** in **CXXFLAGS**:

```make
# before modification...
CXXFLAGS=-Wall -Werror -O2

# after modification...
CXXFLAGS=-Wall -O2
{{< / highlight >}}

### Troubleshooting on Ubuntu

If you are using Ubuntu, you have to install *libcurl4-dev*, which is a virtual package.  You may choose one from *libcurl4-openssl-dev*, *libcurl4-nss-dev* and *libcurl4-gnutls-dev*.

```console
$ sudo apt-get install libcurl4-openssl-dev
{{< / highlight >}}

Because Ubuntu replace `bash` with `dash` as default link of `/bin/sh`.  You have to modify *src/Makefile* and add **SHELL** variable in the top section of the Makefile:

```make
SHELL=/bin/bash
{{< / highlight >}}

Then, you may meet the following error:

```console
# some message omitted...
CurlPost.o: In function `CurlPost::clean()':
CurlPost.cpp:(.text+0x251): no reference to「curl_global_cleanup」
collect2: error: ld returned 1 exit status
make[1]: *** [pastebincl] Error 1
make[1]: Leaving directory `/home/cwchen/src/pastebincl-1.0/src'
make: *** [pastebincl] Error 2
{{< / highlight >}}

In this case, you need to modify the location of **$(CXXLIBS)** in the following section:

```make
# before modification...
$(TARGET): $(OBJS)
        $(CXX) $(CXXLIBS) $^ $(CXXFLAGS) -o $@

# after modification...
$(TARGET): $(OBJS)
        $(CXX) $^ $(CXXFLAGS) -o $@ $(CXXLIBS)
{{< / highlight >}}